784 injector swap, jeep running bad
06-07-2011, 02:27 PM
#1
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Year: 2001
Model: Cherokee
784 injector swap, jeep running bad
After changing the injectors my jeep runs bad now. a lot of smoke comes out the tail pipe its white with a hint of black in it. also it has a rough idle. theres no fuel leaking anywhere.
also has a long crank to it before it turns over
anyone know what I can do?
also has a long crank to it before it turns over
anyone know what I can do?
Last edited by Slugger; 06-07-2011 at 04:22 PM.
06-07-2011, 02:30 PM
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Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
not trying to be a smart ***** but you can always give your stockers a good cleaning, new O rings and reinstall them.
06-07-2011, 03:43 PM
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06-07-2011, 07:49 PM
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Year: 1994 1993
Model: Cherokee
Engine: 4.0
Assuming you didn't mix any of the injector plugs up, everything was plugged back in which had been disconnected and there are no fuel leaks...Are there any check engine codes showing?..If not with the black smoke and the long crank I am leaning towards one of the swapped injectors maybe "leaking down" that is, being stuck in the "open" position. The only way to firm this is to get the system up to pressure (But don`t let it get real hot, just a second or so til the fuel pressure is up) and then as soon as you can pull the fuel rail with the injectors attached (But the engine OFF) and if that is the case you should see the one which is leaky. It`s unusual but it does rarely happen. Try this asap (Shouldnt take long). If not we'll have to think of something else.
Last edited by Programbo; 06-07-2011 at 09:44 PM.
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