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Check engine light comes on after driving at highway speeds at 15m. Turns off w/key.

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Old Jul 9, 2016 | 01:22 AM
  #1  
mustangman65_79's Avatar
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Car: 1989 Iroc
Check engine light comes on after driving at highway speeds at 15m. Turns off w/key.

I tried searching, and couldn't find my problem.

Basically, if I drive the car around town, no problems. But if I get it up to highway speeds for 15m or so, the check engine light comes on. I can't hear or feel the motor do anything when it happens. It also resets it'self when you turn off the key, so I don't think I can get any codes.

A few things about my car.
*the 700r4 has been swapped for a 350
*The stock shifter was been swapped for a hurst(I think, maybe B&M, I didn't do it. ) thus the neutral switch isn't hooked up properly, making me shift it on my own.
*all the smog is disconnected
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Old Jul 9, 2016 | 09:21 AM
  #2  
RBob's Avatar
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: Check engine light comes on after driving at highway speeds at 15m. Turns off w/k

> *all the smog is disconnected

That will do it, it is likely the EGR code 32 being set. Blink out the codes via a paper clip to see which one it is.

RBob.
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Old Jul 9, 2016 | 11:51 AM
  #3  
mustangman65_79's Avatar
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Car: 1989 Iroc
Re: Check engine light comes on after driving at highway speeds at 15m. Turns off w/k

Originally Posted by RBob
> *all the smog is disconnected

That will do it, it is likely the EGR code 32 being set. Blink out the codes via a paper clip to see which one it is.

RBob.
Does that code stay? Because the light resets and I've always heard if the light isn't on, you can't get codes.
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Old Jul 9, 2016 | 01:14 PM
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RBob's Avatar
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: Check engine light comes on after driving at highway speeds at 15m. Turns off w/k

If the SES/CEL stays on long enough a stored code will be set.

RBob.
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Old Jul 9, 2016 | 03:43 PM
  #5  
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From: Temecula, CA
Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: Check engine light comes on after driving at highway speeds at 15m. Turns off w/k

RBob is probably correct. Had the vacuum line fall of my EGR and this was the result.
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Old Jul 16, 2016 | 10:53 PM
  #6  
mustangman65_79's Avatar
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Car: 1989 Iroc
Re: Check engine light comes on after driving at highway speeds at 15m. Turns off w/k

I think the vacuum is hooked up. Need to look more tomorrow.
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Old Jul 17, 2016 | 11:19 PM
  #7  
mustangman65_79's Avatar
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Car: 1989 Iroc
Re: Check engine light comes on after driving at highway speeds at 15m. Turns off w/k

So I forgot to look. haha
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