Cold starting probs

[lanciachris]

If its not the coolant temp sensor, which it sounds like it is, then check the connections and earthing for the sensor.

[Matt_T16]

Idle Air Control Valve/Throttle Butterfly Bypass Valve is gummed up, if it has one.

Remove, empty can of carb cleaner through it, refit.

Matt

[deltaf]

Vacuum air leak possibly.....Loads of little hoses on these babies can split.
Check the hoses between the turbo and the air flow meter (the big ones) and see if theres a split or one of the clamps is loose. Have seen that happen on a N/a celica before now.

Ps, get a can or carb cleaner/brake spray and fire the engine up.
Now squirt the cleaner in short bursts at likely joint areas, such as the air flow meter to turbo hose, vac hoses and any other hoses/clipped pipes that you suspect.

Any leaks present will result in the engine speed raising and then dropping/stalling if you overdo it.

HTH.

[greenv8s]

Gazboy said:

Hi, first thing in the morning, I start the car up, and all it wants to do is stall, the cold idle doesn't settle at 1100rpm, but at 500rpm or not at all, so I have to keep my foot on the gas as the car wont idle, after 2-3 minutes this problem goes away, and the car runs fine. Took it to DS Automotives in Ayelsbury, hooked up diagnostics, and came through all clear, so assumed a sensor is up the creek, so checked and replaced each one from another car, and it made no difference- any ideas?

What state are the plugs in? If they're a bit cruddy it might be suffering a slight misfire until they've got some heat in them, which would pull the idle speed down and make it generally miserable to drive.

[sheepy]

Gazboy said:

It only does it for a few minutes, then runs like a dream, spark plugs next...

Don't know your car well enough, but if it's injection and it has an extra injector for "cold start", could it be bunged up?