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code 42, whats going on?

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Old Aug 2, 2006 | 09:55 PM
  #1  
19doug90's Avatar
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From: Markham
Car: 1990 Camaro
Engine: 355ci
Transmission: TKO-600 5 speed
Axle/Gears: 3.73 10 bolt
code 42, whats going on?

Fault at electronic spark timing circuit OR Fault at direct ignition system OR Fault at fuel cutoff relay circuit

So the motor was just rebuilt with parts in sig, had it out of the shop to break the motor in, was driving around just fine, and all of a sudden it stalled, wouldnt fire back up again, after 10 minutes it started up again but for like 10 seconds then cut out.

This is a fuel issue, you can definitly tell the motor isnt getting fuel

what does this code even mean?
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Old Aug 2, 2006 | 10:18 PM
  #2  
jstrdn90rs's Avatar
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From: Desert Heat
Car: 90 RS/90 Z-71/73 Vega
Engine: 3.1/5.7 TBI/5.7
Transmission: 700R4/700R4/350turbo
Axle/Gears: 3.23/3.42/3.42
Did you check the car for spark or fuel when it died?..I think you might have a bad ICM(ignition control module) after 10 minutes it cooled down enough to restart(classic signs).If that checks out then you either have a wiring problem in the ICM circuit or you may have a bad ECM..start with the easy stuff first though.Thats the path you will take...
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Old Aug 3, 2006 | 09:26 PM
  #3  
19doug90's Avatar
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From: Markham
Car: 1990 Camaro
Engine: 355ci
Transmission: TKO-600 5 speed
Axle/Gears: 3.73 10 bolt
So the motor is getting spark, and pressure to the fuel rail, but the injectors arent pulsing

Just had a temporary chip burned for the break in, before they run it on the dyno and dial it in. Brand new motor.

What in the electrical system could cause that and throw that code?

Car ran greta for the first like 2 hours
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Old Aug 3, 2006 | 10:51 PM
  #4  
jstrdn90rs's Avatar
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Joined: Jun 2006
Posts: 503
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From: Desert Heat
Car: 90 RS/90 Z-71/73 Vega
Engine: 3.1/5.7 TBI/5.7
Transmission: 700R4/700R4/350turbo
Axle/Gears: 3.23/3.42/3.42
Originally Posted by 19doug90
So the motor is getting spark, and pressure to the fuel rail, but the injectors arent pulsing

Just had a temporary chip burned for the break in, before they run it on the dyno and dial it in. Brand new motor.

What in the electrical system could cause that and throw that code?

Car ran greta for the first like 2 hours
Inside the ECM it has injector drivers,which operates the injectors,but in order to do that I think the ECM needs to see a referance pulse which comes from the ICM.I have seen engines with spark/fuel and still wont run.You have to understand there is two jobs of the ICM sending a referance signal to the ECM and suppling spark to the plugs.You can have no referance signal and still have spark.The referance signal is important to pulse the injectors..If replacing the ICM doesnt help ..you need to check the referance signal at the ECM and if you have it then ..you might have fried your ECM.
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Old Aug 4, 2006 | 06:36 AM
  #5  
19doug90's Avatar
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From: Markham
Car: 1990 Camaro
Engine: 355ci
Transmission: TKO-600 5 speed
Axle/Gears: 3.73 10 bolt
no then my shop might have fried my ecm which they can freaking pay for lol, k well im going to call them in an hour when they open, if they have nothing yet ill suggest that. and post sooon.
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Old Aug 4, 2006 | 07:39 AM
  #6  
19doug90's Avatar
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From: Markham
Car: 1990 Camaro
Engine: 355ci
Transmission: TKO-600 5 speed
Axle/Gears: 3.73 10 bolt
its not the icm, they changed out the whole distributor and nothing, any other sugestions other then the ecm its self?
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