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dboise

Slight Surging At Neutral Throttle

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My 92 LS400 occasionally surges slightly at neutral throttle, or when decelerating or accelerating to/from neutral throttle. It is most noticable when the cruise control is adjusting to slight uphill/downhill grades and feels like the engine momentarily stumbles. Other than that, the engine runs perfectly. I am about to remove the throttle body and give it a good cleaning, since the car has 200K miles and I know it is dirty. Hoping that helps. I suspect it is also possible that the trottle position sensor might cause this, but not sure. Anyone had this problem and if so, what was the solution? ... Thanks!

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I have the engine stall problem at idle or low speed occasionally. Do you have the instruction to clean the throttle body? Thanks.

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have you had a recent tune-up. i had a similer problem, where the rpm's would surege in neutral and in park with the engine running. i changes the plugs and it did nothing then i changed the ignition wires and it fixed the problem. give that a shot.

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yeah it might be a time for the tune up, your spark might be too weak already.

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Major tune up 3 years ago at dealer. New sparks and wires. Use only 40K since then. Last week car stall because ou of gas. Maybe clogged injector?

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