Faulty winding can prevent the valves of the fuel injector from properly opening. If a fuel injector is dead and hence causing a dead or non-firing cylinder, the engine will essentially have a hiccup every time it completes a cycle, which results in stuttering or vibration that can be felt in the car or by opening the hood and looking at the engine. 91 Ford 5.8L - Answered by a verified Ford Mechanic This sulfur comes from the crude oil refined into the fuel. What are the Advantages of indirect cold water system over direct cold water system? See what causes these high pressure injectors to … Why don't libraries smell like bookstores? When did organ music become associated with baseball? What would cause 3 gallons of fuel to get dumped in the crank case in 8miles/5min? When to use emergency heat setting on a heat pump? This causes any fuel left in the injector to evaporate, leaving behind hard deposits, inside the injector. On many late-model engines, the shape and direction of the spray pattern is critical for clean combustion and good performance. You can remove the spark plugs and inspect their condition, this way you will narrow the problem to a particular cylinder if it is. Steps. Be wary of aftermarket equivalents, I’ve heard the O-rings won’t fit on several kits. Fuel injectors are used in all modern engines, and are a vital component in the fuel management system. When activated, the injector momentarily opens a valve that allows a precise amount of fuel to spray out. Engine Power Inconsistency – An engine that revs high or low and an RPM gauge … I do not believe this since i recently replaced the injectors. Heat from the engine causes residual fuel in the injector tips to evaporate, leaving a varnish deposit. MAP sensor codes, injector codes, TPS and IAT codes etc. Battery voltage is supplied to all of the fuel injectors and the ground side is controlled by the ECM. Conversely, a damaged spring may keep the valve open and create serious gasoline leaks. PCHEFSONYA MEMBER; 2002 DODGE CARAVAN; I have a 2002 Dodge caravan 3.3l that came in running rough. Depending on the design, an injector may contain multiple sealing rings that contain and control fuel pressure in the injector. What causes stuck valves? This problem … A fuel injector is considered to be clogged if the amount of debris or gunk inside the injector or filter basket has built up to such an extent that it does not allow fuel to flow trough. It would not communicate with the scanner. What story do the plugs tell? What causes the number 5 fuel injector to remain open and flood the cylinder with gas that then flows into the oil pan? Find out why diesel fuel injectors fail and how to avoid it as we see if the injectors are the problem. 2001 Dodge Grand Caravan 3.3 with a #5 injector control wire shorted to ground. If there's fuel down there that you can smell then that's an explosive mix. Symptoms. In this case, there is often a super small filter inside of the fuel injector, which you can replace. Can an injector stick open? If the injector nozzle is dirty, the pattern may be … A bad fuel injector will wreak havoc with how your engine runs, and will likely leave you stranded on the side of the road.. Up until the 1980's, fuel injection was controlled in most engines by a carburettor.In a bid to reduce exhaust emissions, manufacturers were forced to change how fuel … A further symptom of an engine running with a dead cylinder caused by a bad fuel injector is stumbling or delayed … Meaning, the fuel sprayed the backs of the intake valves with each injection. Who proved that a maachine capable of processsing a stream of 1s and 0s was capable of solving any problem? There are a number of issues that could cause your fuel injectors to fail. Mechanic told me to replace the fuel injectors, that they are bad. Of course, over a period of time, the coils in the spool valve can also fail, resulting in a dead injector. Temp, egt, boost, RailPressure, etc are all normal. High pressure fuel is delivered to the injector, which is activated by an engine control unit or fuel injector control module. Rings were washed out in that cylinder from Injector 1 dumping fuel… Deposits and scum tend to build and leave behind debris that can cause the spool valve to stick. This sulfur in the fuel acted as a … That said, it doesn't sound as serious as this from what you say. Fuel injectors become clogged due to hydrocarbons, sediment and other elements in the fuel. So in order to give the best service life for your engine, follow the recommendations of the manufacturer. This will cause the injector to leak fuel. As a result, an issue with one of your fuel injectors can cause your engine to run poorly, or even fail to run at all. Faulty fuel injectors are also known to cause white smoke. Or at least injector pulse length (maybe due to the bottom of the injector drive signal being clipped?). This gummy, sticky, friction is called stiction. Although some may be beyond the expertise of most home mechanics, you can often diagnose a faulty fuel injector using common hand tools. What is causing the injector to stay open. How long will the footprints on the moon last? In this situation, the best course of action is a fuel injector service, to isolate the faulty injector, and replace or repair it. Means black smaoke and a failed catatlitic converter. Most often, the cause of the problem can be traced to the #2 cylinder fuel injector itself, or in the electrical circuitry associated with it. If the fuel injector is clogged, the fuel supply will be irregular too. Some smaller and older service stations has … The valve can stick open, causing poor performance. Leaking Externally Or Internally. This is a common issue on the Caravan and Town and Country models. 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