vFLOODv

Starts fine cold but when car has reached running temp it starts to bog under power.

Checked hoses, spark plugs/wires all seems ok.

Any insight would be great!!

GEORGE_JET

Does it bog when it is cold, or does it appear to run ok? If it only bogs when warm, check the coolant temp sensor. Be aware that there are several coolant temp sensors. Make sure that you check the one for the ECM, and not the one for the instrument panel, fan control, or the climate control.

vFLOODv

Can someone tell me where the temp sensor that leads to the ECM is located? I'm clueless to where it is.

Thanks

vFLOODv

changed the temp sensor and same result still bogs help.

GEORGE_JET

Does it bog while cold? When warm, does it stumble/bog and then pick up? It does make a difference on what you would want to check next. Replacing parts for this type of problem can be a expensive way to fix it.

vFLOODv

^^^It doesn't bog when cold. Yes, when warm it does stumble/bog then picks up exactly as you describe it.

What could be at fault? Thanks GJ for the help so far!

GEORGE_JET

Check for any stored trouble codes. Then check the airflow meter, these cars use a mechanical airflow meter. Make sure that the vane moves smoothly, and does not stick. Measure the resistance with a DVM. Make sure that the resistance tracks smoothly as you open the vane.
Next check the throttle position sensor. Make sure that the resistance tracks smoothly as you open the throttle.

vFLOODv

Will do! Thanks GJ

vFLOODv

ok checked the flow meter vane all is good. cleaned the throttle body since i was there. same result, this time i notice the bogging starts sooner than before running temp now.
stumped.