Help – '98 Sonoma 4.3L RPM problems
Question:
disconnectet the AirSpeed controll module and you’ll improve you RPM. but Service Engine Soon Light will Come on. – Hide quoted text — Show quoted text – > I have a ‘98 Sonoma 4.3 liter with standard transmission. The > problem is that when I’m driving along and I press the clutch in to > shift, the engine RPM’s do not immediately begin to drop. It will > actually go up 100 RPM immediately after I press in the clutch, then > it hangs there for almost a half second and then it will begin to > drop slowly down, very slowly. Sometimes the RPM’s will not even > drop. The engine speed will remain at whatever RPM it was running > before I pressed in the clutch. Sometimes when I let the RPM’s go > all the way down to idle speed (at a stop, for instance) it will not > go any lower than 700 or sometimes 600 RPM. Now and then it will > function properly and drop right down to 550. Anyway this is very > frustrating in a new truck. Anybody else out there experience this? > Does your tachometer act like this? Does anybody have any > suggestions for why this happens or how to fix it? P.S., I’m > describing conditions when the truck is fully warmed up, and no, I am > not resting my foot on the gas pedal. Thanks. Martin – Yuma, AZ
Response:
I have a ‘98 Sonoma 4.3 liter with standard transmission. The problem is that when I’m driving along and I press the clutch in to shift, the engine RPM’s do not immediately begin to drop. It will actually go up 100 RPM immediately after I press in the clutch, then it hangs there for almost a half second and then it will begin to drop slowly down, very slowly. Sometimes the RPM’s will not even drop. The engine speed will remain at whatever RPM it was running before I pressed in the clutch. Sometimes when I let the RPM’s go all the way down to idle speed (at a stop, for instance) it will not go any lower than 700 or sometimes 600 RPM. Now and then it will function properly and drop right down to 550. Anyway this is very frustrating in a new truck. Anybody else out there experience this? Does your tachometer act like this? Does anybody have any suggestions for why this happens or how to fix it? P.S., I’m describing conditions when the truck is fully warmed up, and no, I am not resting my foot on the gas pedal. Thanks. Martin – Yuma, AZ Try checking the throttle position sensor. 600 to 700 rpm for a standard tranny sounds about right to me. What does the sticker say over the radiator? Tim
Response:
It sounds obvious but check your linkage and make sure that theres nothing binding it up or could possibly cause it to hang up. Have you taken it back to the dealer? Mike B – Hide quoted text — Show quoted text – >I have a ‘98 Sonoma 4.3 liter with standard transmission. The >problem is that when I’m driving along and I press the clutch in to >shift, the engine RPM’s do not immediately begin to drop. It will >actually go up 100 RPM immediately after I press in the clutch, then >it hangs there for almost a half second and then it will begin to >drop slowly down, very slowly. Sometimes the RPM’s will not even >drop. The engine speed will remain at whatever RPM it was running >before I pressed in the clutch. Sometimes when I let the RPM’s go >all the way down to idle speed (at a stop, for instance) it will not >go any lower than 700 or sometimes 600 RPM. Now and then it will >function properly and drop right down to 550. Anyway this is very >frustrating in a new truck. Anybody else out there experience this? >Does your tachometer act like this? Does anybody have any >suggestions for why this happens or how to fix it? P.S., I’m >describing conditions when the truck is fully warmed up, and no, I am >not resting my foot on the gas pedal. Thanks. Martin – Yuma, AZ >Try checking the throttle position sensor. 600 to 700 rpm for a >standard tranny sounds about right to me. What does the sticker >say over the radiator? >Tim
Response:
I have a ‘98 Sonoma 4.3 liter with standard transmission. The problem is that when I’m driving along and I press the clutch in to shift, the engine RPM’s do not immediately begin to drop. It will actually go up 100 RPM immediately after I press in the clutch, then it hangs there for almost a half second and then it will begin to drop slowly down, very slowly. Sometimes the RPM’s will not even drop. The engine speed will remain at whatever RPM it was running before I pressed in the clutch. Sometimes when I let the RPM’s go all the way down to idle speed (at a stop, for instance) it will not go any lower than 700 or sometimes 600 RPM. Now and then it will function properly and drop right down to 550. Anyway this is very frustrating in a new truck. Anybody else out there experience this? Does your tachometer act like this? Does anybody have any suggestions for why this happens or how to fix it? P.S., I’m describing conditions when the truck is fully warmed up, and no, I am not resting my foot on the gas pedal. Thanks. Martin – Yuma, AZ
