rpm

  1. WW14

    Breaking up at high RPM

    Hi there, new to the forum. I am a GM tech of 11 years, I have a 97 k1500 that I've recently built the engine for but it breaks up and misfires through exhaust and intake above 4000 RPM. The engine is the stock roller 350 block Eagle rods and mild flat tops Comp cams xtreme energy roller cam...
  2. W

    Is this normal?

    I was driving on the interstate with my truck loaded with around 700 pounds in the bed. I didn’t want to put it in overdrive as there were quite a few hills and I didn’t want to wear out the transmission. I put it in drive but to get up around 75 mph I was around 3500 rpm. I had to drive it like...
  3. W

    Weird RPM issue

    I have a 92 k2500 with a 305. I noticed when I was driving today with my foot lightly on the gas that my engine speed was jumping from 1500 to 2500 and back. It would do it until I either let off the gas or pressed it down further. It keeps doing it and I can’t seem to figure out what’s causing it
  4. Z

    Odb1 aldl data logging

    was wondering if anyone could help me with my data I have no idea what to be looking for, I have a 1990 5.7 tbi and have been having a random shake at a stoplight and rpm drops for a second and goes back to normal when it shakes. Have replaced too many parts trying to figure this issue out and I...
  5. chris2323

    RPM and MPH Gauge Error

    I have a 1997 K1500 pickup and both my rpm and mph gauges are not reading correctly. They are both reading higher than the actual rpm/mph, and seem to get farther off as rpm or speed increases. Has anyone had this issue? Any help or troubleshooting advice would be greatly appreciated. Rpm is...
    • chris2323
    • Thread
    • 411 gauge cluster instrument cluster k1500 mph rpm speed sensor vss wiring help
    • Replies: 27
    • Forum: Electronics
  6. T

    Misfire and voltage drop caused by instrument cluster

    Hello all, I have been chasing an issue on my 1993 C1500 5.7, engine and trans are out of a 1990 c1500. New parts include: Reman ECM, IAC, TPS, MAP, Ignition Coil, Plugs and wires, Coolant Temp Sensor, Oil Sensor., All grounds. I have been having a misfire issue, and whenever the turn signals...

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