Car stalled out w/ code 42

[MP81]

Can't tell if this seems similar to what it was doing earlier: http://www.thirdgen.org/forums/elect...e-42-some.html

[MeenZ28]

Interesting read. Doesn't sound exsactly like what mine is doing but similar. My tach isn't jumpy like his though. But it did make me start thinking about the knock sensor...

On a funnier side note, i was going to look at the car last night but realized when I got home from work that I left my keys in my desk at work. Couldn't get into the car to do anything... oops.

[zeeman]

Bring #1 piston to tdc. Line the timing mark up @ 0. Check to see where the rotor is pointed. Should be @ #1 plug wire position. If you have spark and fuel , you should be getting something.

[MeenZ28]

Yes, i should. Thats the problem. Im not getting anything. I for sure am getting spark. I used an old spare plug and poped off plug wire 1 and layed it on the strut tower as i turned it over. I can see sparks... Timing is correct.
I know i have fuel as the pump primes with the key to on and my gauge at the shrader valve shows normal pressure....

[DanDalessandro]

I want to say vats but vats won't stall a car.. did you rescan it for codes?

[MeenZ28]

Not yet, but code or no code it still wont fire. The Vats has already been bypassed on her long long ago.

[zeeman]

Ok good. Give it a shot of starting fluid or prime with some gas. Just to make surethat fuel is getting to the cylinders. If it fires on the prime. Then you have a fuel problem. Bad fuel ,injectors not fireing, plugged carb/injectors.
It sounds normal whan you turn it iover right?

[MeenZ28]

Normal sure. Just doesn't fire up. I'll try the starter fluid thing.

[MeenZ28]

Tried the started fluid, no help. I quadruple checked my plug wires and timing. Even went as far as changing out all my fuses with new fuses (on a "what if" thought). Still no luck. Im really starting to think the ecm bricked..... Kinda wish i had a friend local with a 92' z28 w/ an 700r4 just to try swaping ecms to see if it makes a differance.

[zeeman]

You can try it,its possible. But if you are getting spark and fuel, air is pretty much a given. It should try to start.

You can try this,its an old wrecker driver tip. Have someone crank the key, and spray wd40 or some other light oil into the intake. You may have a dry motor. Or gas washed the Cylinders . You could do a compression and see whats up.
Pull a couple plugs and see whats going on.

[MeenZ28]

Plugs look fine. Hell they're less than a month old anyway.
the wd40 trick is the same thing i tried with the starter fluid, right? Didnt do anything.

as a matter of curiousity, does anyone know what the bundle of wires that goes over the passenger side strut tower do? I did the wire mod to those a while back and ran them under the wheel well but since i put the air ride in got rid of the plastic well liners. Wondering if theres important wiring there that got damaged or wet or somthing. Anything in that wiring that woul contribute to this?

[zeeman]

Not the same. In a no start situation the cylinder walls can become washed clean of the oil the rings need to seal and make compression. So you spray some oil into the intake so the rings will seal.
As far as the plugs are concerned, its not the age or condition we are looking at here. You need to read them. Look at the deposits. What color are they , black? Tan? Dry? Wet? Oily? They will tell you what is happening in the combustion chamber.

If you have spark, and the timing is correct, you said you had good fuel presure, but it won't fire off of a prime. Something isnt adding up.

[NullHead]

Plugs look fine. Hell they're less than a month old anyway.
the wd40 trick is the same thing i tried with the starter fluid, right? Didnt do anything.

as a matter of curiousity, does anyone know what the bundle of wires that goes over the passenger side strut tower do? I did the wire mod to those a while back and ran them under the wheel well but since i put the air ride in got rid of the plastic well liners. Wondering if theres important wiring there that got damaged or wet or somthing. Anything in that wiring that woul contribute to this?

Yes, the main engine wiring harness runs through the passenger wheel well. I'd look real carefully at all those wires and make sure everything is intact. The body harness / lighting harness goes through the driver's side bulkhead underneath the hood hinge/brake booster area. I could be wrong, but in all the instances that I've needed to remove harnesses, that's what I've found.

[MeenZ28]

Well I'm throwing in the towel. I'm towing it somewhere and letting it be someone else's problem. I hate admitting defeat but I'm stumped and I don't have the time to chase this down any longer. This thing is my daily and My wife is getting cranky having to take me to work everyday and that won't do. Happy wife, happy life.

[MeenZ28]

Yes, the main engine wiring harness runs through the passenger wheel well. I'd look real carefully at all those wires and make sure everything is intact. The body harness / lighting harness goes through the driver's side bulkhead underneath the hood hinge/brake booster area. I could be wrong, but in all the instances that I've needed to remove harnesses, that's what I've found.

Yes but most of the engine harness that comes from the fender well takes a 90 degree turn toward the engine at the fire wall. From what I can tell the only wires that actually cross over the strut tower (which is what I relocated under the strut tower) on the passenger side are all for the cooling fans (which wouldn't be involved in this).