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1990 Chevrolet S10 Blazer Question: 90 Chevy S-10 Blazer stalls replaced EGR

 

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learnandburin, Denver, CO, May 28, 2010, 13:24
 Rookie

I have a 90 S-10 Blazer 4.3l and recently had a rough idle and stalling out after a few minutes of run time. The check engine light came on at highway speeds and I pulled a code 32 of the ECM , reference back to a faulty EGR circuit. The EGR was dirty and plugged beyond cleaning so it has been replaced.

Did a tune up - cap, rotor, plugs, wires as well. The rough idle is gone and it runs at idle fine. I power brake it in drive and reverse and it does not seem to want to stall.

The only time it stalls now is after reaching above the speeds of 15 mph or more and only stalls when I brake at lights. Did another code check and found nothing in the system. Set the e-brake and power braked it again and still only stalls after reaching above 15 mph. I know it seems to be getting enough fuel if it wont die after power braking it. What else could be cause a stall only when reaching above 15 mph and braking ?

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    dandd May 28, 2010, 13:30
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     Master

    A code 32 means that the EGR Vacuum Solenoid is bad, unplug it and see if your Chevy runs better, then replace it. Unplug it ASAP , because when I was a GM dealer Tech, the shorted EGR solenoid would fry the engine computer as well. Also make sure that you have good Vacuum lines in the EGR system.

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    Visitor, May 29, 2010, 13:13

    There is no solenoid on the EGR valve. It is vacuum operated.

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    Visitor, July 12, 2010, 01:53

    the solinoid is on the passenger side vavle cover. follow the vacuum line from the egr.

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  • Answer #2

    Visitor, May 28, 2010, 17:08

    It is looking like the problem might be the fuel pump resistor. This is only used when you reach a certain speed.

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    learnandburin, May 29, 2010, 15:04
     Rookie

    First time of hearing of this part I know of the fuel pump relay and fuel pump and the fuse but never heard of a resistor. I searched a little on a replacement part for it and it is not coming up under that name . Would there be another name it is called by ? Where would it be located on the vech ? I see that there is no solenoid on the EGR it self old style vacum controled , the lines do run back to a control block that has the MAP sensor attached to it. This is that TBI system and I am more use to the MFI setup. Thanks

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    Visitor, July 12, 2010, 02:00

    If the egr was carboned up i bet you will find alot of carbon on the underside of the throttle body. I've done one before. I purchased a tbi overhaul kit and had to poke and scrape the carbon out of the vacuum ports. After this my s-10 ran great.

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