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  1. E

    1987 454 TBI stalls at idle after a short time

    I did not "just plug it in". My laptop does not have a CD drive, I bought the USB drive version. I plugged in the USB drive first then plugged in the cable. It did nothing. I went into COM ports and saw it there as COM 4. I have not put any effort into it as it was headed to the body shop for...
  2. E

    Have you checked your ground?

    Sometime for test purposes I advise to add a ground and if the problem is resolved you know what to do. Find that hidden ground and fix it.
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    AC Condenser - Should I use New Or Original.

    If you need to replace parts because they are worn, leaking or in rough shape than I agree, replace with modern design. If you need to replace hoses, of course use barrier hose. I think that is all you can find anyway, now. My point was if you were happy with the system using R12 and you are...
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    Have you checked your ground?

    I am a field Service Engineer for a major auto manufacturer. I see so many times where a tech has replaced all kinds of parts. I get there and in 15 minutes we have found the wiring issue. Voltage drop testing. Start with the basics, fuses, grounds, etc.
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    AC Condenser - Should I use New Or Original.

    I have converted hundreds of old R12 systems to R134a. I worked as an auto tech back when they phased out R12. Converting was simple. Evacuate the R12, remove the compressor, drain out any oil and measure. If you can, replace the orifice tube calibrated for R134a but the R12 one will work...
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    Rear Window size question

    Have you tried calling a glass shop? LMC has listings for glass. GM made millions of these trucks. Should be a no brainer to find glass. Local glass company will be best because when you pick it up you can check the fit right there. If there is an issue they can see it. I doubt you will have a...
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    Kick panels with 6.5" speaker pods

    These look cool but are pricey. Kickpanels with speakers
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    1987 454 TBI stalls at idle after a short time

    My Laptop is running Windows 10 and keeps trying to get my to go to Win 11. I am not saying the cable is no good. I only tried for a few minutes and when it didn't work I put it away. My truck was headed to the body shop that day and I just needed to check/set the TPS voltage. When it comes...
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    1987 454 TBI stalls at idle after a short time

    I bought the allocable.com usb cable. I could not get it to work. When my truck comes back from the rest shop I need to use it. It is a Windows issue and I have not been able to get the software to see it even though windows sees it.
  10. E

    1987 GMC High Serria K20

    I know this is 6 months late but in the search for High Sierra 3500 emblems I found this guy. Click for Badges
  11. E

    First real drive! Not tragic but not good. I think I need carb advice.

    Vacuum modulators are cheap, just replace it and make sure you have good vacuum supply to it. You will have to adjust it to get the shift point where you need them. As far as HEI goes just buy a stock distributor with HEI for a small block. Replace the pickup inside, vacuum advance and coil...
  12. E

    Starter - Looking for Quality

    Let's say the motor spins at 1000 rpm, then you use gear reduction to reduce it to 300rpm for the engine. By nature of gear reduction you increase torque out of the motor. A direct drive starter free spins at say 300 rpm but under load it will spin at maybe 200. All hypothetical numbers. But...
  13. E

    First real drive! Not tragic but not good. I think I need carb advice.

    Your fuel tank is not venting properly that is why you can't fill it. Did you plumb the vacuum like original using the vacuum diagram? Do you have the vacuum modulator connected on the transmission? Is it any good? Same thing for your vacuum advance on the distributor. Old vacuum diaphrams get...
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    Starter - Looking for Quality

    Tuff Stuff makes good starters. They are made in USA. I would go with a gear reduction starter over a direct drive. They are lighter, smaller, make more cranking power and spin the engine faster.
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    Backfiring through carb. Wont start

    What I tell technicians daily and when I was teaching, make a list of all the possibilities. Write it down. Then all the things that can be checked and verified in 2 mins or less. Do those and cross them off your list (assuming you did not find the problem). Then prioritize the list in easiest...
  16. E

    Hydro Boost

    My 1987 V3500 is currently at the body shop. I trying to remember if there is a cooler for the P/S system. I would check every hose and if there is a cooler make sure it is clear. Inspect all metal lines and make sure none are crushed or kinked. You did not say if the system worked or not. If...
  17. E

    Backfiring through carb. Wont start

    I have been lurking here for a while. Been in the automotive service business since 1985 and now am a Field Service Engineer for an auto manufacturer. Backfiring out the intake is timing. Bring the engine to TDC, make sure the rotor is point to #1 on the distributer cap. Then check firing...
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