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    TBI diagnosis reminder

    having weird issues with your TBI? before getting out the parts cannon, follow this advice from the GM Drivability manual before you start in with more complicated diagnostics--> BEFORE STARTING This check should include: • ECM/PCM grounds for being clean, tight, and in their proper...
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    No power at all, zero lights, guage lights, or anything else. Any help wld be great.

    I'd double check to make sure you connected the wires to the starter properly
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    87 1500 Not Getting Power to TBI Injectors

    this might help.
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    87 1500 Not Getting Power to TBI Injectors

    Looks like A6 comes from ECM I fuse to ECM. It should only be 12v with key ON. If the fuse pops on key ON. You have a short to ground. I had an issue one time where ECM I was shorted to ground on a wire running to the TCC solenoid. Sometimes odd things are powered in odd places....
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    headlight/seat belt buzzer

    I think there are OEM chimera modules available from some GM cars of the same vintage that are a direct plug and play. m
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    headlight/seat belt buzzer

    I appreciate my buzzer also. I've heard you can swap to a module that has a less obnoxious tone...but I don't mind the old school buzz reminder for the rare occasions i need a reminder.
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    What gears

    with the OD trans, 4.56 minimum with 35s. i"d probably lean more toward 4.88. check out-> http://www.grimmjeeper.com/gears.html
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    Bulge Acorn Lug Nuts 7/16-20 Chrome 3/4" Hex

    I needed some new lug nuts, but ended up with a bulk order of 100, even though I only needed 25 ((4 wheels x 6 lugs) +1 spare for a rainy day). bulk was all they had available when I needed them, so I have 75 more I don't need...
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    Hunting idle caused by bad TPS

    I've thought about also getting a tech1. But I was always unsure of exactly what I needed to get for it to work. It does have a some more capability than ALDLDroid.....
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    Hunting idle caused by bad TPS

    I was honestly surprised that such small voltage changes in TPS would cause it. I actually noticed the small voltage changes a couple weeks ago and just shrugged it off. Then remembered I had a spare TPS in the parts tub and thought I'd check it out and see if that was the issue while i was...
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    Hunting idle caused by bad TPS

    It was surging up and down. We'll, really only dropping RPM and then surging back to normal. No more than 50rpm drop. Sometimes it would seem kind of rhythmic and sometimes more random and sometimes it would idle just fine. It wasn't a huge problem yet, but enough that I noticed and finally...
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    1985 Headlight Question

    get the LMC housings for 89-91 that take 9005xs brights and 9006sx low beams. trim the bottom of the back of the low beam headlight bucket with a dremel tool so a 90deg bulb will fit. get some Diode Dynamics sl2 pros for the lows. the 9005xs is fine for high beams. but you can trim the bucket...
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    Hunting idle caused by bad TPS

    the idle started to hunt on me a couple months ago. I'm only about a year on the most recent tuneup, so I ran some fuel system cleaner to see if that would help. no change. so I finally got curious enough to plug in the ALDL scanner and watch some data. I noticed that at idle, I could see the...
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    What have you done to your square lately??

    looks like OEMTools carries an adapter for TBI. bummer about actron
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    What have you done to your square lately??

    I added a test port valve (Actron brand) just after the fuel filter, in between the filter and the flex line. The flex line allows it to stay in place without any modifications. I put a cap on it to keep it clean and just left it in place. That way it is always there to use if I need to check...
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    1987 Fresh Air Intake

    The first 90deg bend is integral to the air cleaner assembly. The second bend in the accordion is also one piece. Check Ebay, I bet you can find what you need there if you don't have a nearby yard to check.
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    1987 454 TBI stalls at idle after a short time

    seems I remember somewhere about issues with Bosch O2 sensors not working well. constant .45v means the ECM and wiring is ok. but for some reason the O2 voltsge isnt changing. I'd try an AC Delco O2 and see if that fixes it.
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    Engine start-up, Lean code 44

    I was thinking there is a free version of tuner pro? you could at least maybe check the O2 voltage by backprobing to see what it is reading. and then unplug it and check the voltage at the connector. it should be between .35 and .55 volts
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    Engine start-up, Lean code 44

    remind me, do you have a scanner to see O2 sensor voltage and fuel trims? could be that it is actually lean, and fuel pressure needs to increase. could also be a bad O2 sensor or a wiring issue in the O2 harness.
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    87 tbi 350 popping at idle and running rich

    there is also these guys, although it says backorder at the moment... https://reddevilriver.com/home-page/ols/products/gm-12-pin-aldl-scan-bluetooth/v/GM-12-PIN-LDL1-CD and these guys for running a laptop... https://boostednw.com/Datalogging/gm-datalogging/boostednw-aldl-12-pin-gm-datalogger...
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    What have you done to your square lately??

    my wiper switch has a loose connection so that when it is less than about 50deg, the washer doesn't work. as soon as the switch gets warm from running the heater for a while, the washer works. as a work around, and to prevent tearing into the column for a relatively minor inconvenience, I...
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    What have you done to your square lately??

    all those manuals are in the Reference Library of this forum to download for free. and they are word searchable
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    Fair price to switch a V10 front and rear diffs to 373 from 308 gears

    that price seems very fair for both axles if everything else is in good shape and no extra items need to be replaced. if something else needs to be replaced, then the price will go up some. I'm in the midwest.
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    87 tbi 350 popping at idle and running rich

    were the EGR passages clear in the intake manifold? are you sure the EGR valve is the correct type? there are positive answers negative backpressure valves. they look very similar, but they are not interchangeable. you can test the EGR solenoid with a mityvac easy enough
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    What have you done to your square lately??

    unless somebody has messed with the throttle stop screw, it is unlikely you need to adjust the base idle. the IAC adjusts to maintain idle speed.

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