dboise Posted February 16, 2004 Share Posted February 16, 2004 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! Quote Link to comment Share on other sites More sharing options...
kaiylee Posted February 17, 2004 Share Posted February 17, 2004 I have the engine stall problem at idle or low speed occasionally. Do you have the instruction to clean the throttle body? Thanks. Quote Link to comment Share on other sites More sharing options...
silvermate Posted February 17, 2004 Share Posted February 17, 2004 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. Quote Link to comment Share on other sites More sharing options...
VMF Posted February 17, 2004 Share Posted February 17, 2004 yeah it might be a time for the tune up, your spark might be too weak already. Quote Link to comment Share on other sites More sharing options...
kaiylee Posted February 17, 2004 Share Posted February 17, 2004 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? Quote Link to comment Share on other sites More sharing options...
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