rpm bounce cause?

[barako ba ma]

Your car has aged graciously. The pcm runs the engine in open loop when the engine has not reached normal operating temperature, meaning, it runs at preset parameters and will only make smart adjustments when it has warmed up. Have your TPS scoped for errors in signal. When the TPS and the MAP or MAF signals don't match longer than two seconds, the engine hunts or the idle speed is unstable because the PCM is confused whether to follow the TPS or follow the MAP/MAF. If the TPS is adjustable, it might be out of range or has glitches on the signal band. This is true with the '90's TPS

[rodetor]

Your car has aged graciously. The pcm runs the engine in open loop when the engine has not reached normal operating temperature, meaning, it runs at preset parameters and will only make smart adjustments when it has warmed up. Have your TPS scoped for errors in signal. When the TPS and the MAP or MAF signals don't match longer than two seconds, the engine hunts or the idle speed is unstable because the PCM is confused whether to follow the TPS or follow the MAP/MAF. If the TPS is adjustable, it might be out of range or has glitches on the signal band. This is true with the '90's TPS

True, logically that is how the PCM works. He needs to calibrate its TPS, kung wala sa calibrated range in WCT (wide close throttle ). Palagi mag aadjust ang PCM ng idling speed.

Sent from my Alcatel Onetouch Pop 3 (5) using Tapatalk

[barako ba ma]

He needs to calibrate its TPS, kung wala sa calibrated range in WCT (wide close throttle




?????


Are you referring to ranging the TPS from closed throttle (0.5 v) to wide open (4.5 v)?

[enzo6k]

iscv baka puro gunk na, sabay na din linis throttle body

[Patrick rolla]

Hi guys I have a problem with my 95 corolla xl 2E engine
palyado siya sa idle taas baba needle ng rpm panget tunog ng muffler pero pag natakbo naman smooth
bagong palit sparkplug,fuel filter, hi ten wire still ganun pa din ano kaya cause nito?? sa carb na ba ito?

[mina_nuka]

Hi guys I have a problem with my 95 corolla xl 2E engine
palyado siya sa idle taas baba needle ng rpm panget tunog ng muffler pero pag natakbo naman smooth
bagong palit sparkplug,fuel filter, hi ten wire still ganun pa din ano kaya cause nito?? sa carb na ba ito?

Have you thought of the spark intensity being inadequate?
Available voltage. 100%
Required voltage. 60%
Reserve voltage. 40%


If the spark observed outside of the combustion chamber is other than bluish white the spark is too weak.

Other possible causes:
Worn out camshaft
Carbon build up behind the valves
Carbon build up inside the intake and exhaust ports.
If memory serves me right, your engine has port fuel injection. These might be clogged or sticky.

[ralph13]

Your car has aged graciously. The pcm runs the engine in open loop when the engine has not reached normal operating temperature, meaning, it runs at preset parameters and will only make smart adjustments when it has warmed up. Have your TPS scoped for errors in signal. When the TPS and the MAP or MAF signals don't match longer than two seconds, the engine hunts or the idle speed is unstable because the PCM is confused whether to follow the TPS or follow the MAP/MAF. If the TPS is adjustable, it might be out of range or has glitches on the signal band. This is true with the '90's TPS

very accurate answer!!! salamat po. so TPS lang po ba ang dpat ko i adjust dito? what is the settings that should i use?