Rpm fluctuate when car get warm

[pwuser156905914475]

Rpm get fluctuate when car get hot when headlights on or when ac is on and even get shutdown as rpm reach zero when accelerate.
In cold its fine even when headlight and on ac .
Car civic 97

[arslansarwar]

Bhai urdu main likhen. Samj nahi aa rahi

[hasankhurshid29]

Have you checked TPS and IACV?

[hasankhurshid29]

Check tps output when throttle is fully closed means don't press pedal. It should be 0.5V.

[pwuser156905914475]

issue yea. jub gari garam hojati hai tou rpm uper nechay karnay lgatha hai. agar idle 900 hai tou wo nechay jata hai upper ata hai yea hi hota raytha hai.. jub headlight ya ac on karo.. or agar race do tou khabhi khabhi bund hojata ya khud idle mai bund agar ac on off karo ..

warna cold mai car set raythi hai with no headlight on and off and on Ac both.

[pwuser156905914475]

should i serviced throttle body..
or i try to run fan direct and check if its working fine on direct fan. may be thermostat value no supporting or opening the way it has to be .
As this is happening after i change the thermostat .

[umair149]

since it only appeared after changing thermostat and nothing else.
I would advise to check that coolant temperature sensor is working ok. A malfunctioning coolant temperature sensor could cause this issue most probably in your case.

Also make sure that you have no air trapped inside cooling system. Cooling system shall be bled on any such job.

[pwuser156905914475]

As i didnt blend the system when installing new thermostat. will do that .

[hasankhurshid29]

Đirect Fan is not the solution as then the optimum temperature will not be reach or reach after a long time. And then the idle issue will came up. Any CEL reported anytine driving

[pwuser156905914475]

Direct fan option doing just to check. If its working fine or not without it. So will get idea its thermostat issue.

As done throttle clean but still same.

[umair149]

Did you solve the issue yet.

[pwuser156905914475]

No still searching n fixing what too doo next

[streetmachines101]

Try bleeding the coolant system to remove any air bubbles.

[pwuser156905914475]

After diagnosing thoroughly found. Weak ground connections and and baterty ampere less.
Will change that and then advice how its responding

But after doing timing corrected and bleding cooling system. Its much fine now....