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  1. R

    Rough Idle

    BigCope923 what code number was pulled for your truck?? If your fuel pump is newer or has been changed please test pressure because its not alot of fun to change fuel pump. Mine has arrived and waiting for a second set of hands to replace. The idle up and down on your post is exactly what mine...
  2. R

    Rough Idle

    Going through the same issue. My truck pulled code 43. Which is basically knock sensor. But. I have a suspicion that its knocking due to lean condition due to fuel pump. I tested knock sensor, replaced map sensor and tested tps. rebuilt my tbi with new diaphragm for regulator and truck runs like...
  3. R

    Uneven idle. No power.

    Ok its been awhile and still messing with this truck. I recently replaced the MAP sensor and IAC control on the TBI. Tested the TPS per kennthewelders advice and it checks good. New O2 sensor. Check engine light not on at idle but does come on when i get on it. Code is 43. Which if i am reading...
  4. R

    Uneven idle. No power.

    Thanks. but the check engine light was on all the time before this and now its off. I do know how to check the TPS with a volt meter so i will try that first. thank you.
  5. R

    Uneven idle. No power.

    Long story short. 1990 c1500 rwd 5.7. Recently my truck died on road while driving. Always ran rich before and sucked lots of gas but still got me there. Rebuilt TBI with Diaphragm for regulator etc. Replaced temp sensor in manifold, also new O2. After this the idle surges up and down and almost...
  6. R

    a/c retrofit

    Thanks. I just changed the pressure switches. all is well with the pressures. I would absolutely agree needing to change the condenser. I will see how it goes. Since I did not change my condenser i only put in 6oz. of ester oil. Pag is apparently not compatible with mineral oil found in the...
  7. R

    a/c retrofit

    Looking to retrofit my 1990 c1500 from r12 to r134a. I already have the fittings installed and the system has leaked out a long time ago. I pulled a vacuum for 30 minutes and it held at 28inches of mercury for 30 minutes. My question is what type of oil do i use after flushing the evaporator and...
  8. R

    TBI 350 jumpy timing

    Please post what you find in case the rest of us have the same issue!!
  9. R

    TBI 350 jumpy timing

    Also I have pulled these distributors apart and soaked the shaft and reluctor in Evaporust overnight with good results. Just need snap ring pliers and a punch for the roll pin.
  10. R

    TBI 350 jumpy timing

    I know this is a shot in the dark. But my girlfriends son and i both have a 1990. He seemed to always have a problem getting the distributor hold down clamp on the shoulder correctly and would always have it just pushed up to the distributor and not clamping downward. You sound very...

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