Recent content by gmbellew

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    Instrument gauge problem, can’t find much info

    the only common thread between the instrument gauges being inop with ign on and the headlight buzzer going off with the ign on that I can think of is the ignition switch...
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    Throwing Parts at the Wall

    Replacement parts, even AC Delco, often aren't as reliable as a 35yr old OEM part. I'd not replace what isn't broken. For no 1, I'd start simple with the IAC and do a hard reset. Jumper A and B on the ALDL and turn key to "on" for 30-45 sec. You should eventually hear the stepper motor in the...
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    '87 TBI lurching and surging

    I had a cracked torque converter control solenoid cause those symptoms once on my 1990 burb. but they only showed up after the converter locked once on a drive. I could drive around town fine as long as i never locked up. but if I locked the converter, it never fully unlocked and caused that...
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    Sad Discovery: GM 10 Bolt Fails

    https://www.quickperformance.com/GM-85-10-Bolt-Eaton-Detroit-Truetrac-Posi-Gears-Bearing-Kit-Package_p_21559.html This is what I had installed when my rear end went out.
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    Oil dripping around starter

    I have a similar situation on my 1990 350. it is hard to see in that area, but I think it might be the dipstick tube at the block on mine. like you said, all above the area i can see is dry. and that's the one thing in that area that I just can't see all that well.
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    Brown timing wire diesafter unplugged

    good call on checking for vacuum leaks and EGR system operation. if you replaced the IAC, you could try a hard IAC reset by jumpering AB on the ALDL port with a paper clip with ign on for about 45sec. that will fully seat it and the computer knows where closed is regarding IAC counts.
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    Brown timing wire diesafter unplugged

    when you unplug the timing wire, the timing should be controlled by the ignition control module under the cap. if it just dies when you unplug the timing wire, I'd suspect that the module may be bad or maybe is somehow poorly grounded? check the reference library for the service manuals. the...
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    Code thrown but not for my year/MAP issue

    The ECM operates a solenoid to control the exhaust gas recirculation (EGR) valve. This solenoid is normally closed. By providing a ground path, the ECM energizes the solenoid which then allows vacuum to pass to the EGR valve. The ECM monitors EGR effectiveness by de-energizing the EGR control...
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    Correct Fuel Pressure 1987 350

    If you still are getting code 32, I'd diagnose that before I made any other changes
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    Correct Fuel Pressure 1987 350

    10psi is the low end of spec (9-13psi). code 32 is EGR, not MAP. could be the EGR valve is stuck open or the EGR solenoid might be bad. did the code 42 come back after the new ICM was installed?
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    Code thrown but not for my year/MAP issue

    last pic because you can only attach 5. I'd pop yours off and compare to these pics to make sure it looks exactly like the old one in these photos
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    Code thrown but not for my year/MAP issue

    here are photos comparing the old one (correct part, but old) and the new one (incorrect part) from when I had issues. the correct new one I acquired later looked exactly like the old one, just clean
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    Code thrown but not for my year/MAP issue

    here is the proper EGR part number AC Delco 214-5073. if you have no more off idle stumble with the EGR hose plugged, I'd suspect the likely culprit to be the wrong type of EGR if the EGR solenoid is operating properly. the valve and the solenoid components are tested separately.
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    Random Service Engine Soon light

    manual says 10-20 degrees retard. not sure where I got 8 from. sorry for the bad Intel. Electronic Spark Control (ESC) system is designed to retard spark timing up to 10° - 20° to reduce spark knock (detonation) in the engine. This allows the engine to use maximum spark advance to improve...
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    Code thrown but not for my year/MAP issue

    I bet you have the wrong EGR. There are positive and negative backpressure EGRs. Only get an AC Delco. I had a thread on this somewhere with the part number...search it up. I replaced mine and had an off idle stumble. Parts house said it was right. But it was not. Replaced with the proper part...

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