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    Vibration?

  2. A

    Vibration?

    Should hammering on front of pass. exhaust manifold while using timing light cause change in timing?
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    Vibration?

    Yes, seem to be. With it up in the air all looks good. Somebody installed this motor after 2019 and could never have had it running right with bad fuel pump and several sensors. Motor assembly and install appeared to have been done by someone with good sense. They installed hydraulic roller...
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    Vibration?

    Hi Schurkey; My brick tells me no knock counts at idle. Is this a good or bad thing? When ecm wire disconnected timing holds steady on 0. When connected the timing fluctuates 2-4 or so degrees. The truck idles sweet with no pops or stumbling. When I grab a handful of throttle while sitting...
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    Vibration?

    I appreciate comment. What I so poorly conveyed was that when I found the 5 lb. I installed new Delphi. Thank you will correct post.
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    Vibration?

    Hello; Just deleted long winded post begging for help. After all of the hours invested in troubleshooting I have come to the conclusion that my remaining problem may well be a vibration. Can anyone tell me how to troubleshoot a possible flex plate problem or any other reciprocating vibration...
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    92 GMC troubleshooting

    Thanks Again; I was just looking back through here and saw I had not responded to your last message. I appreciate your knowledge as well as your wit.
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    Cold start problems with 1992 GMC 5.7 liter

    I should add that the rough running clears up well before it kicks into closed loop, according to my scanner
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    Cold start problems with 1992 GMC 5.7 liter

    No, does not continue after about a minute or when I goose the throttle a bit.
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    Cold start problems with 1992 GMC 5.7 liter

    Thank you caminonut. I recently replaced the cts but you know how the new ones are sometimes defective. Will try to ohm it out to check.
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    Cold start problems with 1992 GMC 5.7 liter

    Thank you wic. Set at zero with wire unhooked but will recheck today.
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    Cold start problems with 1992 GMC 5.7 liter

    I can't find this thread in engine performance and maintenance so lord knows where I sent it but will add this anyway. Hopefully someone will find it. "With my computer skills I might as well drive down to the coast and put my question on a message in a bottle. I started the truck this...
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    Cold start problems with 1992 GMC 5.7 liter

    I have tried to find in old discussions anything that applies and can't to this point. Have truck running quite well after a few months of headaches. Suddenly it started running super rough when cold started. I can rev it up for a bit and it straightens out. If I disconnect the wire for...
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    Slow Roller

    Good write-up I look forward to your progress.
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    New-to-me truck first tune-up 5.7L vortec

    Plugs 5 and 7 on the passenger side? Mentioned a couple of times above. Am I missing something?
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    starter only working when jumping engine relay,

    Is this a GM?
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    Looking for 1995 to 1999 Tahoe or Yukon

    While you are here Bondovw, How much are you asking and how many miles. Judging from the vegetation you may be a little to the North in Ca.? Thank You
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    Belt Squeak is driving me crazy

    This is a real reach but my 1990 K1500 started a screeching sound right after I installed a new engine a couple of years ago. I assumed it was a belt. Changed serpentine- no change. Got out stethoscope- no help. It only did it at highway speeds under acceleration. Finally figured out it was...
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    Windshield and rear window replacement

    Very sorry to hear that you have these problems in the Great North too. I buy good used glass from a guy in Oregon that buys and sells old chevys and parts. About 100 US for windsheilds. I'm betting you can find a guy in your area doing same. I have a couple to do for myself. Facebook...
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    92 GMC troubleshooting

    Thanks. Will check further in am.
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    92 GMC troubleshooting

    Now that I put in a working temp sensor and fixed the map it feels good to hear it run. Still struggling though. Last eve I was running the truck in the shop and reached under the hood and goosed the throttle a few times up to maybe 2500 rpm's. I was leaning over the alternator when I did so...
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    92 GMC troubleshooting

    Who was that masked man? Seriously Road trip, thank you for your help and I appreciate that and your wit. How true the quote about lack of knowledge. Made me wince.
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    93 Suburban 13.6V @ Temp Sensor

    Temp sensor by T-stat housing should get 5 volts but, correct me if i'm wrong, temp gauge on gauge cluster is driven by sensor on drivers side head and I think gets electrical system voltage. My temp gauge in 92 is acting in a similar fashion and I need to replace.
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    92 GMC troubleshooting

  25. A

    92 GMC troubleshooting

    Thank you Roadtrip; I'm not Worthy! That took a little time and I very much appreciate it. I'm looking for a map of the ecm wiring and when I find it I will prove out those grounds. If I understand you correctly, typically I should get some kind of a code or indication if ecm is dying. I...

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