Hello y’all, just recently finished swapping in a 5lm60 to my 94 k1500 with a 350 tbi. It runs great off idle, but at idle it runs horribly.
It’s surging like hell and can’t find where it wants to sit.
fuel pressure should be fine, I just tested it about a month ago while throwing in a new fuel filter. Also rebuilt the TBI unit like 4 months ago.
Coolant temp sensor was recently replaced aswell. New plugs, plug wires, cap rotor etc.
Swapped in a spare IAC I had, actually ran worse on that.
Other than that my next step is probably a smoke machine to see vacuum leaks, it sounds like a vacuum leak to me.
Video of issue:
Thanks!
It’s surging like hell and can’t find where it wants to sit.
fuel pressure should be fine, I just tested it about a month ago while throwing in a new fuel filter. Also rebuilt the TBI unit like 4 months ago.
Coolant temp sensor was recently replaced aswell. New plugs, plug wires, cap rotor etc.
Swapped in a spare IAC I had, actually ran worse on that.
Other than that my next step is probably a smoke machine to see vacuum leaks, it sounds like a vacuum leak to me.
Video of issue:
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Thanks!