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  1. tsr2185

    Ebrake question

    Odd question. I know I'm due to replace my drums, I've got a decent vibration when braking and goid bit of grunting noice when coming to a stip from the rear. I know one drum is warped for sure. Reversing out my driveway, I pressed ebrake and held the release open and the rear seemed to...
  2. tsr2185

    Drop in crate to replace 350TBI

    I use my 91 k1500 SCSB every 3 weeks for a 4 hour drive to and from work. When Im home, i use it for beer runs/grocery runs/etc. I love tinkering with it and I know inevitably the engine will give out (275 k on body, 115k on GM goodwrench in 2005) Maybe 1 month from now, or ten years who...
  3. tsr2185

    88-94 recirc actuator calibration?

    Got the dreaded click and replaced my recirc actuator. Few weeks later this one started clicking again. Got another ordered and the wrong style was sent to me. So I went ahead and removed old one, inspected gears and it seemed fine to me. Replaced it and functioned it and noticed that the door...
  4. tsr2185

    TBI oil pressure sending unit

    My 1991 350TBI runs fine and is my highway cruiser. Pretty much at anything above 1/4 throttle the oil psi gauge pegs out. I wasn't really concerned out it, as I know OBS oil pressure questions usually open pandoras box. BUT, when it does peg out, the gauge makes a loud audible click in the...
  5. tsr2185

    Rear end rattle diagnosing?

    91 k1500 350 700r4. With g80 I hear a loud rattling in the rear end when I brake or coasting off throttle at highway speeds, mostly exiting off highway. Sounds very similar to a paint rattle can. I stopped to fill up and check for play in the drive shaft but didn't notice play. I was also...
  6. tsr2185

    Tbi ac

    Should a properly charged 91 TBI ac compressor cycle on and off ever in above 75deg weather? Referring to below 20psi low side pressure? Can anyone give me the best reference chart for pressures of 134 in our converted systems? I charged mine last year when temps were around 95 and now they...
  7. tsr2185

    1991 s-10 2.5l overheating (delete if not allowed)

    Sorry for the wrong forum, but theres a wealth of knowledge here and Im sure someone here can help me... My father in laws s-10 started overheating, which resulted in a warped and cracked head. He got a new head and rebuild the top end and still over heats. Hes changed thermostat twice, water...
  8. tsr2185

    91 r4 system over haul

    Quick background: Truck sat for 3 years when I purchased it in 2020, and was told the AC worked. Bought in winter so no need for AC. When I finally needed it, the compressor wouldnt stay running I bough a fix-in-a-can freon kit (r134 converted system) and charged system. Low while running...
  9. tsr2185

    1991 AC & RPM question

    Got a odd question... My compressor blew, so i got it unplugged at the compressor so it doesnt try and kick on when I put defrost on. I plan to completely overhaul the AC system and get it working this summer. When I hit the AC on button, the controls would show it was on, and I can feel/hear...
  10. tsr2185

    Power steering pump going bad?

    91 350tbi Had a belt/pully squeel a few weeks ago and replaced belt. The squeel didn't really stop. I've got a mild leak on what I believe is the high pressure hose for the steering pump. I plan to replace both lines soon but wondering if I need a new pump aswell... This morning was the second...
  11. tsr2185

    Leaky 700r4

    Finally crawled under the truck to inspect after having to add .5qt atf every ~1000 miles. Never showed obvious leaks on ground when parked. Noticed the pan cork seal was crumbly around the edges and wet all around. Torqued bolts down for now to compress whatever seal is left until I get a kit...
  12. tsr2185

    Powerstop koe1970 doesnt fit?????

    Driving me nuts. Took off old pads and rotor and the new pads won't fit on the new rotor with old caliper. Got a new caliper thinking other one was bad but still needs about another 1/4-3/16" clearance. What am I doing wrong??? Cylinder needs to compress flush to clear rotor but wont. 1991...
  13. tsr2185

    Dirty tbi intake?

    91 350 Is this common buildup for a 100k plus engine? Got 270k on body and assuming intake was off original engine. I got a spray can of seafoam I will spray into pcv valve port tonorrow. Just wondering what I should expect before and after??? Side note, egr was bad when I got truck. Not sure...
  14. tsr2185

    Flooded GMT400....

    I am currently offshore and my '91 TBI is in Houma, LA heliport I have not had confirmation that the parking lot is flooded, but it is VERY likely. My question is, if it is confirmed flooded and I get it on a flatbed and tow it home 28 days from now (i would think driving it home wouldn't be...
  15. tsr2185

    TBI rebuild

    I believe my regulator was shot and leaking down the backside of the bowl, through the square hole? Is this much buildup common? It was all mostly around the bowl and inside bowl. Had a terrible bad gas smell when tearing it apart, and the PO said it sat for almost 2 years before I bought it...
  16. tsr2185

    350 tbi datalogging

    Got my aldl cable coming in tomorrow, and wanna make sure I'm ready for datalogging with tuner rt pro. Anyone know which profile is correct? All include 91 L05 in the description. Should they all 3 work? Anyone specific I should use? A058, A106, or A138. Also. I'm assuming I DONT need the...
  17. tsr2185

    Another rough idle thread

    My truck idles rough when hot. Starts up and idles fine and drives fine. Noticed when ac or defrost is on (compressor unplugged cause low on froen) it idles better. Thoughts? 91 350 tbi. Replaced within last 6 months: IAC plugs and wires Distributor Coil Egr Temp sensor All vac lines, plugged...
  18. tsr2185

    350 TBI wire harness replacement options?

    OEM 12167747 has been discontinued (probably forever), wiring harness for 350 TBI. All my pigtails and connectors are in rough shape, and i've been slowly changing em out when I replace sensors. I think it would be best to just change out the whole harness eventually with a new one. Besides...
  19. tsr2185

    Idler arm upgrade compatibility?

    91 k1500 I got a 2 bolt style idle arm. I heard I can buy a 3 bolt style for the 94+ models and just drill that 3rd hole and the other 2 line up. Any truth to this? Is it as simple as drilling just one hole? I plan to replace with moog problem solver idler arm cause mine is shot.
  20. tsr2185

    Front end play

    Cant post video but How fucked am I... Jacked up passenger side front tire to inspect the rotor and I have a lot of play fron to back on the tire. Makes a clunking noise when going over bumps from that area. Play seems to come from the tie rod, not hub. Assuming it's idler arm? Any advice on...
  21. tsr2185

    1991 350 knock sensor question

    While changing out my starter, i broke the blue wire going into the knock sensor. Was in a rush and was told it would still run like this so i put the new starter in. Did some online research and it looks like all i need is a new pigtail? Its seems like this one was pretty jerry rigged with...
  22. tsr2185

    1991 350 no crank

    Was charging my ac at lowes and right when I got it fully charged, something blew out and all the freon leaked out. Scared the **** outta me. Turned it off after about 20 seconds once I realized what happened with a plume of freon filling the engine bay, and fired right up a few minutes later...
  23. tsr2185

    1991 K1500 AC Actuators

    So I got the famous clicking 30 sec after each cycle off the ignition under the passenger dash. The temperature selector seems to work fine, blows cold and hot when selected to do so. But the vent selector has no response when going from defrost to floor, Its stuck on dash vents and the...
  24. tsr2185

    1991 Running lights

    Truck sat for 5 days and started truck and turned on lights. The daytime running lights didnt work at all, headlights were fine. Cycled light switch a couple times, and checked fuse. After about 5 min idling they suddenly came on, I didnt touch anything. This sound like a stuck relay, or bad...
  25. tsr2185

    1991 350tbi bad valve seals?

    Put hand over exhaust pipe (got duals) and can feel it push and pull while idling. Father in law said shouldnt do that and he thinks it's a leaky valve gasket or maybe timing is off. I just installed new distributor and set timing to 0 with my harbor freight timing gun. Sounds good at initial...

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