QuestionQUESTION: I have this car and it misses on 3 cyc 4,6,5 pull plug wires and nothing have spark on all 6 cyc to plugs eletric injectors all work but misses all the time don't know if it might be a sensor problem ? if you know of anything please let me know thanks
ANSWER: Hi Paul,
If there is spark and injection on a cylinder and still it misses, then it could be a leaky/partially clogged injector or a problem with compression. Probably the easier test would be compression and if that shows the values of all cylinders to be within 25% or oneanother, then I would consider changing out the injectors.
You might also check the egr valve to be sure it isn't sticking slightly ajar. It is located in the pipe that starts at the front exhaust manifold and crosses in front of the engine toward the rear. Look for the valve stem between the round top and the body of the valve, hidden behind a flange. Inside the flange find the stem which has a slot in it. Use the slot with the tip of a screwdriver to move it back and forth. See if internal spring-action causes it to close to a dead stop. If not or it seems stick then spray some WD-40 on the stem where it enters the valve body and work it back and forth.
Those are the possibilities that I can see.
Roland
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QUESTION: In jectors are all new the compression is all about the same the i can not find a egr valve this 3.0 has the front manifold and has a cross over pipe going to the back maifold and where would you find this egr valve both manifold go to the 02 sensor than out where would it be and is it hooked to somthing thanks
ANSWER: Sorry, unless it was sold in California that year it won't have egr.
Otherwise you might want to check the injector driver wires in case you don't have good signals to those cylinders. How about the wire order around the distributor cap? It is different from the actual firing order so check that possibility. You could have spark, but not at the right point in time.
Have you tried for fault codes using the ignition key? "on-off-on-off-on and leave on" doing that in 5 seconds or less elapsed time. Then count the number of flashes between each pause of the 'check engine' light. Let me know.
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QUESTION: it looks light the it started out as 1 then 2 then 4 then 1 then 4 and then 6 i have no clue im about to give up on this car thanks
AnswerYou can re-read the codes to be sure of accurate counts.
You should always get a 55 (end of readout). Might the 46 been a 55?
The 12 is routine usually and just means the power from the battery to the computer was disconnected recently usually be disconnecting the battery for some other reason. Recently means the last 50-100 key cycles.
The 41 means the alternator field coils are not responding as requested by the computer which you would have noticed as a charge warning light if the field coil is 'open'.
The 46 (if not a 55) means the voltage output of the alternator is too high (which could also be due to the field coil wire from the alternator to the computer being shorted to ground (which would be another type of 41 cause).
I don't see any codes related to 'missing' here. You could verify continuity of the injector 'driver' wires for cyl 4,5,6: they go to 14,38 and 58, respectively at the computer plug. Each injector has a dark green/orange 12v wire, and the other wire is the 'driver'.
But do try codes again, and again if necessary until you are sure you have them accurate,
Roland
