idle fault

[hijacka]

Did you replace the secondhand intake gaskets? Perhaps they where damaged? Warm the car up to normal running temp before reset. also check the vac line on the fuel reg for cracking or splitting

[Shaun]

all new vac lines a month ago so no splits anywhere. i will check the gaskets.

when i started the car to come home from work today it idled up to 1800 and then dropped away to nothing and stalled.

would i be right to think that the temp sensor is tricking the ecu into thinking the car is hot so the cold start doesn't work properly?

[titian]

As i suggested in post two. Also you show the temp sensor circled in your photo,You mentioned the sesing wire was a bit dodgy too. Reckon that's potentially where the issue is. Fans do not always come on if the sensor or the wire are giving fault issues.However the CEL will probably stay on.

As suggested,change the sensor and see,they not too expensive.

Just f ??? kin awkward to change! (17mm spanner req)

[hijacka]

You don't check them, Buy some new intake manifold gaskets and install them. Perhaps the condition of them were over looked when you changed the intake etc? IMO it sounds like a vac leak as the idle control valve operation is to leak air but that air is measured. Now your manifold gaskets if leaking will cause idle to hunt up and down and may change in rpm as the car warms up. other symptoms may also include high pitch turbo squeal at high rpm and load and backfiring between gear changes.. Good luck hope you find the problem whatever it maybe.