hesitant acceleration Options

[lifesagt]

Only on cold start and until the engine is a running temp. I have a problem with acceleration, not just slight hesitation but when i put the accelerator to the floor it crawls along for a few seconds then slowly starts to accelerate. I have had it in at toyota and they have replaced the O2 sensor and their is no other faults showing. I'd take it back but they are way too expensive for repairs or diagnosis. When at running temp the car is great. Not really sure what kinds of things could be causing the problem and only at that specific period when cold. Any help would be great. Cheers

[DrAg1n320]

hi, is the vehicle misfiring at all?. When it first starts up cold, does it take a while for it to crank or does it just fire right up. How long does it take to warm up? im sorry if i ask so many questions.

[lifesagt]

Hi, no misfire and starts up straight away. after starting it almost stalls but then goes to normal revs. It takes approx ten minutes to get to running temp. The idle feels as though there is a slight miss though. Cheers

[purplegt4]

check your spark plugs.

maybe she just needs a tune-up.

[lifesagt]

today i removed and checked the leads, plugs and distributor cap. all are working fine and although their was some slight carbon build on the plugs, nothing unusual to speak of. i cleaned them anyway. After putting it back together i still have the same prob. I'm at a loss of what to do next.

[alltracman78]

Possibly your TPS [or AFM if you have a GE].
What year/model/engine is it?

[lifesagt]

It's a 1993 2ltr GT, SS1 jap import with 3s-fe engine. don't want to sound like a dummy but can you please explain TPS and AFM and what they do. Would those things have an effect only at cold running temp? Cheers

[alltracman78]

Ah

You don't have an AFM.
The TPS is the throttle position sensor.
If it gets cold the contacts can become bad, and it takes a second for the ECU to read where it is.

[lifesagt]

is their a way to check this?