1990 s10 4x4 4.3 tbi fuel too rich; s...

1990 s10 4x4 4.3 tbi fuel too rich; stalls; rough idle

Posted in the Chevrolet S-10 Forum


Regina, Canada

#1 Dec 28, 2009
Anyone help?
Almost 300K km original powertrain and all electronics, except of course rotor, plugs, wires,
Smells rich-running (gas) outside anywhere !
I did see the EGR Valve problem posts but not sure there yet.
Key giveaway is that after stalling, even if warm (not a weather issue), must wait 10-20 minutes before it will restart, because even tho it's turning over, it just won't start before it's time!
Was told that TBI= primitive and that there's some kind of worn(out?) seals inside the throat where gasfuel leaks past injectors into intake manifold, and injectors can't meter this, so get a choking rich ratio?
Gastank fuel pump also original.
Can anyone give me details??

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