QuestionQUESTION: Roland,
My 92 lebaron cranks but will not start, I checked for spark and I have It, their is also a + voltage present at the coil, next I checked for fuel and my pressure gauge shows 60#, I then checked the green orange wire off the asd and I have voltage when the engine cranks, thr codes I get off the controller are 355. Any suggestions where to look next?
Thanks, Joe
ANSWER: Hi Joe,
Given you have spark and fuel, then it would be likely a mixture issue. The codes you got, 12 and 55 (the '3' was probably 1 and 2 but you missed the pause) are unremarkable. My thought is you have an egr valve that is stuck ajar (if you have an egr which apparently way only used on the cars sold first in California). So check that out, then if you do: check your egr valve to make sure it isn't sticking slightly ajar which will cause rough or no idle. It is located near the throttle body bolted into a pipe that originates at the exhaust manifold and carries some exhaust gas back to the intake. But it has to be closed when you try and start/idle it. There is a round top and the body of the valve bolted into the pipe; in between those parts is a flange that hides a valve stem that is rod-like and has a slot. The tip of a screwdriver when inserted in the slot can then be used to move the rod back and forth which opens and closes the valve. Make sure that the built-in spring-action causes the valve to close to a dead stop quickly and firmly. If not, then spray some WD-40 on the stem where it enters the body and work it some more until it does.
Other than that, look for a vacuum leak around the intake manifold or its several vacuum hoses.
If you write back verify the 3.0L engine is what you have in the vehicle.
Roland
---------- FOLLOW-UP ----------
QUESTION: Hi Roland,It is a 3.0 mitusibushi engine. I do not have a egr valve on the engine, I visually checked all the hoses and replaced any questionable hoses, still no go. I put a vacuum gauge on it and cranked the engine and have very little vaccum. Could I possible have a intake or plenum leak, as I replaced the water pump and leaking coolant tube , along with both cam and crank seals, reassembled with new gaskets and torked to specs.
Thanks, Joe
ANSWER: Hi Joe,
You also put on a new timing belt, perhaps, or re-used the old one, so I would check the timing marks to be sure those are "on" the expected locations at TDC. After that, then a manifold/plenum leak would be the prime suspect.
Roland
---------- FOLLOW-UP ----------
QUESTION: Hi Roland,
I did replace the timing belt but I did make sure all my timing marks were dead on as the manual states. Since I last contacterd you I pulled the plenum and manifold, recleaned everything and reassembled with new gaskets, vacuum increased but still no start. I put my test light on one of the fuel injectors and I have a one the green /orange wire but no - on the other, when the test light is across them it does not light, Where does it get its ground?
Thanks Joe.
AnswerHi Joe,
I am not sure that I understand your question about the injectors wiring. The dark green/orange wire will be found at all 6 injectors and it is a common 12V supply from the ASD relay when it is energized and also supplies the spark coil and oxygen sensors. Each injector has its own control wire with a unique color and those 6 wires go to pins 13,14,15,16,38 and 58 of the pcm (injectors 4, 3, 2, 1, 5, and 6 respectively) and the pcm grounds those wire momentarily based upon the signals from photo diodes in the distributor which time the pulses properly. So I would check the wires at the injectors to see them be grounded. I suspect they would read 12V when they are not being pulsed, and then momentarily ground.
Alternatively, they could float, but if they were plugged into the injector they would show the 12v always present on the dark green/orange.
Have you checked for fault codes? Turn the ignition switch on-off-on-off-on and leave on, doing that in 5 seconds or less. Then count the pulses sets as shown by the check engine light.
I assume that you didn't change the spark plug wires at the cap, correct? That can mess you up if you aren't aware that the rotational positions are not in the same order as the firing order of the cylinders.
Roland
