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xtascox

Hard-core CEG'er
Joined
Sep 13, 2007
Messages
1,132
Location
Philadelphia, PA
Well I just got off the phone with the shop looking at my car and they told me that they have faults on all 6 injectors. The fuel pressure is there but there is no spray from the injectors. I mentioned the thought of the PCM but they didn't know for sure and recommended that I take it to a dealer. I'm considering swapping in a known working PCM. What do you guys think?
 
I just got off the phone with another mechanic who worked on a contour with a similar issue and he said to try replacing the coil pack. There is spark, but no injector spray, so would replacing the coil make sense?
 
Injector fault on ALL 6 injectors says to me to check the injector harness for bad wiring. Perhaps there is some missing wire insulating and you are getting a short atsomewhere in the harness. I would check there first. If you are certain that the PCM is the same code as your original, then there would be no problem swapping them just to eliminate the PCM as the problem. Your mechanic should be able to test the injector wiring with a volt/ohm meter to make sure that there is power/ground to the injectors themselves. If all looks well there, I would say there is a fuel issue.
 
Pale Horse said:
Injector fault on ALL 6 injectors says to me to check the injector harness for bad wiring. Perhaps there is some missing wire insulating and you are getting a short atsomewhere in the harness. I would check there first. If you are certain that the PCM is the same code as your original, then there would be no problem swapping them just to eliminate the PCM as the problem. Your mechanic should be able to test the injector wiring with a volt/ohm meter to make sure that there is power/ground to the injectors themselves. If all looks well there, I would say there is a fuel issue.
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The fuel pressure is correct and I already put in another fuel pump and filter so that eliminates a fuel issue. The problem is that it seems to clear up for a couple days when the battery has been disconnected for some time. I will stop by the shop tomorrow morning and pull the #4 and number #11 fuses and let the PCM reset and see if it starts. If not, I'll have it towed home and get to work.
 
I forgot to mention that this happened within a few minutes of hitting WOT. The first time it happened back in early February was a WOT pull all the way through 3rd to about 6000 RPMS. It died within 3 minutes. Then when it died Saturday, I had maybe hit WOT for about 5 seconds in 4th just to see how she was running, and the car died in less than 5 minutes. IIRC both times it died was the first time I hit WOT since I got the car back on the road.
 
BAD SVT said:
the odds of having all 6 faulty injectors are negligible. something else is wrong. check your harnesses like was mentioned earlier. so after WOT and the car shuts down, does it turn over?
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Yes it turns over. Just no spray from the injectors. I highly doubt there is anything wrong with the injectors. It has to be wiring or PCM related.
 
You said it happened after WOT. Well, remember that when starting the car, if the gas pedal is jammed to the floor then the injectors are turned off. :ponder: Maybe this has something to do with it :shrug:
 
zorrex said:
You said it happened after WOT. Well, remember that when starting the car, if the gas pedal is jammed to the floor then the injectors are turned off. :ponder: Maybe this has something to do with it :shrug:
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nah, i don't think so. it should still start. i had problems with my pcm. in fact, i had to change it. a faulty pcm will totally mess up the car. so the mechanic is sure that's the problem?
 
BAD SVT said:
nah, i don't think so. it should still start. i had problems with my pcm. in fact, i had to change it. a faulty pcm will totally mess up the car. so the mechanic is sure that's the problem?
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The mechanic only knew for sure that the injectors were all faulting and not spraying. I mentioned the PCM and he agreed but also said there could be a short causing it. I still have perfect spark, and I'm not sure if a bad PCM would affect the spark or not.
 
zorrex said:
You said it happened after WOT. Well, remember that when starting the car, if the gas pedal is jammed to the floor then the injectors are turned off. :ponder: Maybe this has something to do with it :shrug:
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I was thinking that too, but I can't figure out how it would affect the car while running and why it wouldn't happen as soon as I hit WOT.
 
xtascox said:
The mechanic only knew for sure that the injectors were all faulting and not spraying. I mentioned the PCM and he agreed but also said there could be a short causing it. I still have perfect spark, and I'm not sure if a bad PCM would affect the spark or not.
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for the most part, a faulty pcm will throw many values and parts other than injectors off. am just sceptical about a bad pcm that affects just the fueling system.
 
So someone please explain to me...

The shop towed my car home for free. They didn't charge me anything at all, even for the hour they spent diagnosing the issue. So I went over and bought them all lunch. Anyway, when I got home I said what the hell, and popped the key in the ignition and to my surprise she started right up and ran for an hour straight without dying once. I tugged, twisted, pulled, bent, hit, and whatever else I could think of on all the wiring going to and including all the wiring on the injector harness, and I could not cause it to stall. So then, thinking maybe my car was having power issues, I got in the car and cranked every accessory in the car I could think of and revved the car hard, and still, no problems. I am incredibly perplexed. I keep wanting to think computer issues, but I wouldn't know where to start...
 
xtascox said:
So someone please explain to me...

The shop towed my car home for free. They didn't charge me anything at all, even for the hour they spent diagnosing the issue. So I went over and bought them all lunch. Anyway, when I got home I said what the hell, and popped the key in the ignition and to my surprise she started right up and ran for an hour straight without dying once. I tugged, twisted, pulled, bent, hit, and whatever else I could think of on all the wiring going to and including all the wiring on the injector harness, and I could not cause it to stall. So then, thinking maybe my car was having power issues, I got in the car and cranked every accessory in the car I could think of and revved the car hard, and still, no problems. I am incredibly perplexed. I keep wanting to think computer issues, but I wouldn't know where to start...
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i think your car has an attitude problem:laugh:
 
is it possible that there is something in the fuel line in between the injectors and the valve stem that gets disturbed when wot/calling for more fuel. could be all gunked up.
 
xdetroitx said:
is it possible that there is something in the fuel line in between the injectors and the valve stem that gets disturbed when wot/calling for more fuel. could be all gunked up.
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But would that call for the PCM to shut off all 6 injectors? If that is the case, I will run some injector cleaner through tomorrow just to test it.

Tonight on my drive home I spent a great deal of the time putting things together. This is what I was able to pull together out of my head:

The car runs amazing with no issues for roughly 3 days of off and on driving. Now what I realized tonight was that, within a few hours I get System too lean bank 1 and bank 2. All of the other codes I noticed with the car come up at the time the car dies. I thought to myself "Why are they showing up when the car dies? None of them affect the car running!"
Well I can't explain why the car dies (other than knowing the injectors are all not spraying), but I do know that this is about the time when the PCM completes all 8 system monitors. What this has to do with the car dying I do not know but I do know that it must be telling me something.

So now, I need a list of all possible reasons the PCM would decide to cut the injectors. Also, I need to know what type of diagnostics equipment I need to buy to make the car think that all 8 monitors are complete, so I can try to recreate the situation (other than running the car for a hours on end). One other thing I noticed tonight when running the scan tool to see how many monitors are complete (which was 3 after about an hour of running), is that I can hear the PCM(EEC? Correct me if they are not the same unit.) clicking for the first scan or two, then the clicking stops. Is it normal to hear this clicking?

To sum it up:
1. What possible reasons could cause the computer to cut the injectors?
2. What do I need to obtain to make the computer think all 8 monitors are complete, and further more, cause it to throw codes?
3. Is the PCM clicking when running a scan tool normal?
4. Why would all 6 injectors fault after all 8 monitors are complete?
 
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