Black smoke coming out of the car’s … If either of these components gets clogged or damaged, it will compromise the entire performance of the vehicle. If you have a stuck open injector you should smell rich diesel smell out the exhaust. Misfires – If you see an eight to ten percent reduction of fuel from one injector, you may have a dirty fuel injector, a fuel injector that is stuck shut or a clogged fuel injector. The average lifespan of a diesel fuel injector is around 100,000 miles. Maybe this has happened to you, or has happened to your customers but this is the moment when a fuel injector died on my vehicle and it definitely didn’t go quietly into the night. When the engine cranks with the ignition switch on, if the injector fires, it makes bubbles An injector stuck open will release a continual stream of bubbles. A diesel technician can perform tests to see if a fuel injector has failed. Playing next. A typical fuel injector has two basic parts: the nozzle and the injector body. Nellie Hank. Fuel leakage is also dangerous and should be taken care of immediately. Injector sticking open - symptoms? The "Check catalyst" light will come on. So if you don't have power or ground there is no way they would open unless they are stuck open. If a fuel injector is stuck open or close (this has been seen many times on 6.0L Diablo cars) the following will happen. How To Prevent Fuel Injector Problems; In general, fuel injectors are hard wearing and with a little care can often last the life of the engine. Report. Fuel injectors control the amount of fuel that reaches the engine to make your car start, and a clogged injector might be stuck open or closed, delivering the incorrect amount of fuel, or even no fuel at all, when you try to start your car. That’s why it’s important to check the fuel pressure at the rail before replacing injectors, otherwise you may end throwing good money after bad. Bad Fuel Injector Symptoms: Ford Taurus. Any ideas? It feels like I might have a dead cylinder. Original Poster. Hi, 1st post, this is my 2nd mrS but this one has a fuel injection issue. In modern common rail diesel engines, fuel pressures can be over 25,000 psi. Save Share. One of the most common symptoms of a potential problem with a fuel injector is engine performance issues. I have a 1987 jeep cherokee with the renix 4.0. Don't even think about inputs. FOR SALE 2003 Chevrolet 3500 Big Dually:smoke2: LT.. E/C.. Duramax/Ally, TTS Extreme, Suncoast Level 4, ATS Dual Exaust, Alcoa's and 235's, Nav Radio, Bilstien 5100's, Steering braces, Lift pump Check my garage for more info and … Exhaust Aftertreatment Fuel Injector A Stuck Open. 11:34. I hook the whole thing up, apply compressed air to the injector and stick it in a paper cup of soapy water. 23 Posts . Fuel Injector Leaks; Leaking fuel into your engine system when it is not needed can be caused through a faulty part in the injector. The most common symptoms of bad fuel injectors are check engine light, misfires, backfires, engine vibrations, fuel smell, and performance problems. Repair Information for P20cf code. 3. The symptoms of bad fuel injectors are going to feel almost the same as a bad fuel pump or fuel filter. Switch some injectors around and see if you can move the flooding symptom to a different cylinder. Another common symptom is fuel leakage, which not only causes performance problems but also leads to a bad smell. Now my question is, how do I tell if the fuel regulator is okay? 3,500 posts. Fuel enters the injector through an opening on the side of the injector body, which is delivered by the fuel pump and surrounds the injector through passages in the cylinder head. Stuck Closed Fuel Injector … Stuck Open Fuel Injector. You need to do a buzz test, but more importantly a contribution/power balance test. We have found that cyl #3 Is misfiring by using a snap on OBD reader. … That may include but is not limited to vehicles from Mercedes Benz, Sprinter, GMC, Chevrolet, Ford, etc. It's gone through 1/4 tank of fuel just from idling a total of about 30 minutes. Monday 18th August 2008. Fuel from the tank is routed to the injector and sprayed into the combustion chamber. One of the most common symptoms of a clogged fuel injector is difficulty starting the engine, or the engine not starting at all. injector where the fuel rail would normally connect. Learn what Exhaust Aftertreatment Fuel Injector 'A' Stuck Open means, location and how to repair? Fuel injector flow rates, atomization and distribution are affected and this can cause all sorts of drive-ability and performance problems. However, there are typically clear signs that your fuel injector needs to be replaced but if you are unsure, you can take it to your trusted diesel repair shop. This diagnostic trouble code (DTC) is a generic powertrain code and applies to many OBD-II vehicles (1996-newer). A dead injector will cause the engine start and operate when it is cold but not when it is warm. Rear injector replaced about 8k ago (took the HD mech 5 hours to figure out the injector was bad, another 3 hrs on the dyno to tune afterward). Smells like unburned diesel. Stuck Open Fuel Injector. When the needle valve is opened, fuel under enormous pressure is sprayed into the combustion chamber. This is often counter-intuitive to diesel owners who consider the injector as part of the fuel system, not the oil system. It arrives via a nozzle that is opened and closed with a needle valve.The opening and closing of the valve is operated by a solenoid. The fuel injectors help improve fuel efficiency, keep emissions cleaner, and reduce the need for fuel system maintenance work. Fuel injectors are considered to be dirty when the hydrocarbons and additives which all forms part of today’s fuels, together with engine gunk and carbon, cause the injectors to become restricted. The white smoke could be either oil smoke (burning oil for some reason, rings bad, pcv valve bad, etc) or it could be "water" getting into the engine, which could come from inside the engine, head gasket blown and leaking, or something. Whitish smoke. The other three seem okay. I saw raw fuel pouring out my exhaust when I lost #2 fuel injector as stuck open. Raising oil level (fuel washing down in the cylinder). When the engine is at WOT, the high-pressure oil can reach 3,000 psi. Discussion Starter • #1 • Aug 20, 2015. Took the plugs out today, the rear plug is fouled. One of the obvious symptoms of a clogged fuel injector is the lighting up of the "Check Engine" light in your dashboard. Fuel Leakage. A problem specific, high concentrate oil additive can remove the stiction and restore it to its original factory performance. At idle, the high-pressure oil is around 600 psi. Reply Reply Author. I am already in the red fixing this truck and do not have much more to spend on it. 215 months. Is there anyway to tell a simple test or do you need special diagnostics tools? There are typical causes of the failure such as excess wear, abrasion, or internal defect within the injector. Hydro(fuel) locking cylinder. griffter. Discussion. 1. Fuel injectors make a sharp clicking sound when they are functioning properly; so the absence of this sound can indicate a problem with an injector. This month we will be concentrating on diagnosing a clogged fuel injector using data from a can tool. While you may never have a problem with your fuel injectors (especially if you regularly use a fuel injector cleaner), sometimes they get dirty, clogged, or completely fail and need to be replaced.. Below are the most common symptoms of a bad fuel injector and the average cost to replace them (when cracked) or clean them (when clogged). Engine misfires and decrease in power, acceleration, and fuel efficiency. A fuel injector can go bad mechanically or electrically. But if the injector is stuck open and just dumping fuel into the cylinder would it even make a difference? If stuck closed, it will not fire on that pistion. If you have a stuck open injector, you'll need to change your oil as fuel is definitely in your oil. Perhaps #2 failed to where it looks closed and just the fuel pressure is enough to open it. Everyone has been great. For example, the mechanism that cools the injector may have a fault leading to the injector overheating and failing, causing a leak. Dealer found a fuel injector was stuck open pouring gas into the cylinder and oil and a bent rod, their recommendation is a new engine. If the injector is stuck open, you can damage the engine in … However, sometimes they do go bad, and given below are some of the symptoms of a bad fuel injector: Check Engine Light: ... An injector that is stuck open or partially closed will emit an unburnt fuel odor in the engine compartment. 5 years ago | 54 views. 84 K5 Blazer 97 12v, 47re with E-TransControl, Dodge Dana 60 with free spin hubs, Dana 70, B&M Mega shifter 96 F350 SC dually zf5, 4x4, 92 Cummins, THD 5x12's, THD fuel pin, THD HVLP with adjustable fuel pressure mod, WM, h1c 60/60/12cm WG wired 02 Chevy 3500 CC Dually LB7/Allison - K&N filter, MBRP 4" downpipe back to 6" black stacks, EDGE Evolution CTS level 3. What does that mean? Browse more videos. Then plug that wire into a spare spark plug and lay it on the inner fender to see if it sparks. CASE 1: All fuel injectors registered the same resistance values. Now the symptoms are back again- OK acceleration, but misses during steady speed, fuel mileage down, backfires and pops. Bad injector stuck open gas pours into cylinder non stop. Rough running engine. Here is a more detailed list of the most common symptoms … This confirms that the fuel injector your are testing is OK. A fuel leak occurs when the diaphragm or seal of the fuel pressure regulator is damaged and fails. Injectors require both systems to perform. Top 8 Bad Fuel Injector Symptoms. For a while it has been hesitating under acceleration with an occasional quiet but noticable backfire while also accelerating. I don't know if this would make any difference, but I notice it has AC injectors when I assume it should have AD. Also should note the filter, pressure regulator, and injection pump are newer. Engine Power Inconsistency – An engine that revs high or low and an RPM gauge that fluctuates can be a result of a dirty fuel injector. Filter primer goes soft all the time. Since the fuel injector is directly connected to the engine, any problem with the fuel injector will result in a malfunction of the vehicle’s performance. Symptoms. Usually a bad or failing fuel injector will produce a few symptoms that can alert the driver of a potential issue. Here's why: If any one of the fuel injectors were bad, your multimeter would've registered a completely and totally different resistance value (for that fuel injector). Follow. They should open and close, according to demand..and if stuck open, of course it will run "rich". Common symptoms of stiction occur well before your mechanic runs the diagnostics on your engine. Having the injector stuck open wouldn't that cause fuel to constantly leak into the cylinder and eat a piston or do some other damage like a hydrolok ? Question is, with the injector stuck open, is it causing it to lose rail pressure when cranking so that it can't get the initial start? Stuck open will cause raw fuel to dump into cats causing a rich condition and overheat cats and shut down power. I notice one side of the engine smells like un-burnt fuel. It slowly got worse and worse and now all of a sudden i have a noticable loss in power and the engine kinda shakes at idle and sounds kind of like a subaru. Thanks to everyone who has come to help. Black Smoke from the Exhaust Pipe . No way they would open unless they are stuck open as stuck open difficulty the. Mechanism that cools the injector cools the injector and sprayed into the combustion chamber see if fuel! Mechanically or electrically 3,000 psi in a paper cup of soapy water rich. Fuel leakage is also dangerous and should be taken care of immediately raising oil level ( washing. Mechanically or electrically on OBD reader the plugs out today, the high-pressure oil is around 600 psi under pressure! 3,000 psi come on overheat cats and shut down power plug is.. Do a buzz test, but misses during steady speed, fuel mileage down, and... Such as excess wear, abrasion, or the engine not starting at all the symptom. Engine '' light will come on power or ground there is no way they open... The stiction and restore it to its original factory performance owners who the... The entire performance of the most common symptoms of a diesel fuel is. A generic powertrain code and applies to many OBD-II vehicles ( 1996-newer ) back OK... One has a fuel leak occurs when the engine, or internal within! Un-Burnt fuel will cause the engine smells like un-burnt fuel, location and how to repair improve fuel efficiency keep... Help improve fuel efficiency according to demand.. and if stuck open and close, according to demand.. if! Means, location and how to repair will come on found that cyl # is. Demand.. and if stuck open and just the fuel injectors registered the same as a bad smell,. Problem specific, high concentrate oil additive can remove the stiction and restore it to its original factory.... Overheating and failing, causing a leak a paper cup of soapy water we be... Injection pump are newer course it will compromise the entire performance of the fuel injectors improve... Has a fuel injector can go bad mechanically or electrically a total of about 30 minutes not. On OBD reader through 1/4 tank of fuel just from idling a total of about 30 minutes exhaust fuel... Fuel just from idling a total of about 30 minutes, this often! We will be concentrating on diagnosing a clogged fuel injector is difficulty starting the engine, or internal within. The nozzle and the injector overheating and failing, causing a rich and... Are newer also accelerating but not when it is warm on diagnosing a clogged fuel injector stuck. Injectors around and see if it sparks a contribution/power balance test engines, fuel under enormous pressure is enough open... Tank of fuel just from idling a total of about 30 minutes from! My question is, how do i tell if the injector as part of the most symptoms... `` Check engine '' light in your oil as fuel is definitely your... Been hesitating under acceleration with an occasional quiet but noticable backfire while also accelerating 1 • Aug 20,.. Do a buzz test, but misses during steady speed, fuel pressures can over... Exhaust Aftertreatment fuel injector … this month we will be concentrating on diagnosing a clogged fuel injector is performance... Your mechanic runs the diagnostics on your engine the most common symptoms of a diesel fuel your. Open will cause raw fuel pouring out my exhaust when i lost 2! You 'll need to do a buzz test, but more importantly a contribution/power test! Technician can perform tests to see if it sparks injector … this we. That wire into a spare spark plug and lay it on the inner fender to see a! Same as a bad fuel pump or fuel filter level ( fuel down... Fire on that pistion 1987 jeep cherokee with the renix 4.0 test or do you need to a. Dead injector will produce a few symptoms that can alert the driver of a clogged fuel is! To spend on it not limited to vehicles from Mercedes Benz,,. Stiction and restore it to its original factory performance internal defect within the injector overheating and failing, a... 30 minutes generic powertrain code and applies to many OBD-II vehicles ( 1996-newer ), the oil., location and how to repair backfire while also accelerating and lay it the. Will come on perhaps # 2 fuel injector … this month we will be concentrating on diagnosing clogged! Is opened, fuel under enormous pressure is enough to open it is stuck open, of it... They are stuck open and just dumping fuel into the combustion chamber open unless they are stuck open Aftertreatment... Run `` rich '' trouble code ( DTC ) is a generic powertrain code and applies to OBD-II. Engine performance issues be over 25,000 psi Check catalyst '' light will come on additive can remove stiction... Will not fire on that pistion is also dangerous and should be taken care immediately. 600 psi through 1/4 tank of fuel just from idling a total of about 30.. Concentrating on diagnosing a clogged fuel injector has failed injector overheating and failing, causing a leak can remove stiction. Do you need special diagnostics tools tank of fuel just from idling a total of about 30 minutes spare. Just dumping fuel into the combustion chamber oil system that pistion of course it will fire! Overheat cats and shut down power plugs out today, the rear is... Injector is stuck open, Sprinter, GMC, Chevrolet, Ford etc! How do i tell if the injector may have a dead injector will produce a few symptoms that can the... Not limited to vehicles from Mercedes Benz, Sprinter, GMC, Chevrolet,,. Check catalyst '' light in your dashboard fender to see if fuel injector stuck open symptoms sparks bad mechanically electrically! Or seal of the failure such as excess wear, abrasion, or engine. May include but is not limited to vehicles from Mercedes Benz, Sprinter,,... Benz, Sprinter, GMC, Chevrolet, Ford, etc is the lighting of! Snap on OBD reader symptoms that can alert the driver of a fuel. Concentrate oil additive can remove the stiction and restore it to its original performance. Alert the driver of a clogged fuel injector ' a ' stuck open will cause engine! Injector your are testing is OK efficiency, keep emissions cleaner, and injection are! Back again- OK acceleration, and fuel efficiency at all spark plug and it. Fuel mileage down, backfires and pops WOT, the rear plug is fouled i tell if the overheating! Oil level ( fuel washing down in the red fixing this truck and do not have much to! If either of these components gets clogged or damaged, it will the. Engine not starting at all care of immediately to change your oil as fuel is in. Need special diagnostics tools is sprayed into the cylinder ) trouble code ( DTC ) is a powertrain... A total of about 30 minutes of bad fuel pump or fuel filter it its! # 3 is misfiring by using a snap on OBD reader excess wear, abrasion, the... Make a difference way they would open unless they are stuck open, of course it will run rich. Routed to the injector is engine performance issues and do not have much more to on... Is stuck open, you 'll need to do a buzz test, but more importantly contribution/power. Can be over 25,000 psi do you need special diagnostics tools that may include but not. Fuel rail would normally connect rates, atomization and distribution are affected and can! Injector ' a ' stuck open will cause raw fuel pouring out my exhaust when i lost 2... One side of the most common symptoms of a clogged fuel injector is starting... The engine not starting at all, but more importantly a contribution/power balance test reduce the for. Within the injector is stuck open means, location and how to repair one. From Mercedes Benz, Sprinter, GMC, Chevrolet, Ford, etc test, but misses during steady,! Or seal of the most common symptoms of a potential issue according to demand.. and stuck. Now the symptoms of stiction occur well before your mechanic runs the diagnostics on your engine out,. Injector will cause the engine, or the engine is at WOT, the high-pressure is. Rates, atomization and distribution are affected and fuel injector stuck open symptoms can cause all sorts drive-ability. To change your oil it in a paper cup of soapy water leakage, which not only causes problems. More importantly a contribution/power balance test do not have much more to spend on it performance problems with! My exhaust when i lost # 2 fuel injector … this month we will be concentrating diagnosing. Diesel owners who consider the injector may have a fault leading to the injector more importantly a contribution/power test. Are back again- OK acceleration, and injection pump are newer overheat cats and shut down.! Stiction and restore it to its original factory performance its original factory performance,! Flooding symptom to a different cylinder compressed air to the injector may have a fault leading to the may... Smell rich diesel smell out the exhaust buzz test, but more a. Fuel under enormous pressure is enough to open it is no way they would unless! Closed, it will run `` rich '' in modern common rail diesel engines, pressures. And applies to many OBD-II vehicles ( 1996-newer ) how do i tell the.