Injector sticking open - symptoms? Now my question is, how do I tell if the fuel regulator is okay? This is often counter-intuitive to diesel owners who consider the injector as part of the fuel system, not the oil system. 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. 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). Hydro(fuel) locking cylinder. 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. 215 months. There are typical causes of the failure such as excess wear, abrasion, or internal defect within the injector. This month we will be concentrating on diagnosing a clogged fuel injector using data from a can tool. Reply Reply Author. Whitish smoke. Raising oil level (fuel washing down in the cylinder). This diagnostic trouble code (DTC) is a generic powertrain code and applies to many OBD-II vehicles (1996-newer). Fuel from the tank is routed to the injector and sprayed into the combustion chamber. Smells like unburned diesel. Bad Fuel Injector Symptoms: Ford Taurus. 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 ? Stuck Closed Fuel Injector … Stuck Open Fuel Injector. One of the obvious symptoms of a clogged fuel injector is the lighting up of the "Check Engine" light in your dashboard. 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. What does that mean? Any ideas? 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? A fuel leak occurs when the diaphragm or seal of the fuel pressure regulator is damaged and fails. 11:34. 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. I don't know if this would make any difference, but I notice it has AC injectors when I assume it should have AD. But if the injector is stuck open and just dumping fuel into the cylinder would it even make a difference? It feels like I might have a dead cylinder. Then plug that wire into a spare spark plug and lay it on the inner fender to see if it sparks. Discussion Starter • #1 • Aug 20, 2015. Engine misfires and decrease in power, acceleration, and fuel efficiency. Exhaust Aftertreatment Fuel Injector A Stuck Open. Top 8 Bad Fuel Injector Symptoms. 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 3,500 posts. That may include but is not limited to vehicles from Mercedes Benz, Sprinter, GMC, Chevrolet, Ford, etc. CASE 1: All fuel injectors registered the same resistance values. Fuel Leakage. Black Smoke from the Exhaust Pipe . If the injector is stuck open, you can damage the engine in … Hi, 1st post, this is my 2nd mrS but this one has a fuel injection issue. Usually a bad or failing fuel injector will produce a few symptoms that can alert the driver of a potential issue. 3. Bad injector stuck open gas pours into cylinder non stop. Is there anyway to tell a simple test or do you need special diagnostics tools? 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 … At idle, the high-pressure oil is around 600 psi. Took the plugs out today, the rear plug is fouled. I hook the whole thing up, apply compressed air to the injector and stick it in a paper cup of soapy water. A problem specific, high concentrate oil additive can remove the stiction and restore it to its original factory performance. 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. Thanks to everyone who has come to help. 1. Nellie Hank. Fuel leakage is also dangerous and should be taken care of immediately. injector where the fuel rail would normally connect. Playing next. Another common symptom is fuel leakage, which not only causes performance problems but also leads to a bad smell. When the needle valve is opened, fuel under enormous pressure is sprayed into the combustion chamber. Save Share. 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. For a while it has been hesitating under acceleration with an occasional quiet but noticable backfire while also accelerating. If a fuel injector is stuck open or close (this has been seen many times on 6.0L Diablo cars) the following will happen. One of the most common symptoms of a potential problem with a fuel injector is engine performance issues. So if you don't have power or ground there is no way they would open unless they are stuck open. Filter primer goes soft all the time. If you have a stuck open injector, you'll need to change your oil as fuel is definitely in your oil. A diesel technician can perform tests to see if a fuel injector has failed. The "Check catalyst" light will come on. Follow. Monday 18th August 2008. 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. 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). One of the most common symptoms of a clogged fuel injector is difficulty starting the engine, or the engine not starting at all. They should open and close, according to demand..and if stuck open, of course it will run "rich". 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. Also should note the filter, pressure regulator, and injection pump are newer. 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. I notice one side of the engine smells like un-burnt fuel. The average lifespan of a diesel fuel injector is around 100,000 miles. Symptoms. 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 fuel injectors help improve fuel efficiency, keep emissions cleaner, and reduce the need for fuel system maintenance work. Stuck open will cause raw fuel to dump into cats causing a rich condition and overheat cats and shut down power. A dead injector will cause the engine start and operate when it is cold but not when it is warm. Don't even think about inputs. Black smoke coming out of the car’s … griffter. 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. If you have a stuck open injector you should smell rich diesel smell out the exhaust. When the engine is at WOT, the high-pressure oil can reach 3,000 psi. 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. Common symptoms of stiction occur well before your mechanic runs the diagnostics on your engine. I saw raw fuel pouring out my exhaust when I lost #2 fuel injector as stuck open. 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. This confirms that the fuel injector your are testing is OK. Injectors require both systems to perform. 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