The 2nd. problem is after replacing one fuel injector. It now won't idle. Emit lots of smoke from ex manifold. Replaced man intake gaskets. Egr is shut at idle.
I don't know liter size of engine? I don't know exactly what testing you have done? I need more info?
You have dis ignition? Engine cranking, do you have spark at the plugs, proper fuel pressure and fuel injector pulse?
The purple wire with white tracer from ignition module to computer has a dc pulse with engine cranking? With bypass ignition, engine cranking, it's the ignition module that controls spark, during cranking rpms. Did you check voltage and ground for ignition module. With dis ignition, there is a crank sensor? I'm not saying replace anything. I would have replaced the --spark plugs and plug wires, Possibly the ignition coils.
I just don't know exactly what testing you have done?
If you have already done everything I suggested, then, pardon my post. Just trying to help.
SOURCE: I have replaced coils, plugs,wires, o-2 sensors,
hi dispite all your hard work the error says you have a missfire /random cylinders hope this helps if so give the answer a rating please thanks pete
SOURCE: pops back through the intake when it is cold runs
This problem can be caused by defective spark plug wires that are cross firing due to voltage leaking to a nearby plug wire as well as a flat camshaft lobe.
Check the coil and inginition module, they may be failing as the engine warms up. Also check you have the correct gap on the new spark plugs.
hope that helps
Terry
Check PCV System for vacuum leaks
Smoke Test all your work-intake,etc
Test & Smoke the Evap System for leaks
I don't think you really understand what this fault code means, it means that likely all the engine cylinders are misfiring at random no set pattern, not any particular cylinder. I would start with checking for engine vacuum leaks like the intake manifold gasket. that is all I can say since you provided no make, model or year and engine type and size information.
49 views
Usually answered in minutes!
×