idle problem

[jdearden]

been out for a drive today and all was fine then stopped off for some lunch got back to the car started it and the idle is really high. tried turning off and on again but still high its sitting at about 1900 rmp rather than normal 900. any1 got any ideas. the fans were working over time but temps seemed fine. any ideas guys

[sundance02]

jdearden said:

been out for a drive today and all was fine then stopped off for some lunch got back to the car started it and the idle is really high. tried turning off and on again but still high its sitting at about 1900 rmp rather than normal 900. any1 got any ideas. the fans were working over time but temps seemed fine. any ideas guys

check the throttle linkage under the rear clam my be stuck open slightly try a bit of WD40. When you blip the throttle does it stay at 1900rpm or settle back to norm

[jdearden]

its stays at 1900 or between 1500-1900. tried throttle cable and is fine. just seem very wierd cant put my finger on it. car is running fine apart from whole in manifold which should be sorted next week

[sundance02]

jdearden said:

its stays at 1900 or between 1500-1900. tried throttle cable and is fine. just seem very wierd cant put my finger on it. car is running fine apart from whole in manifold which should be sorted next week

Maybe ECU. Poss the hole in manifold has caused it to re set, have a similar prob with mine except my Lambda sensor is failing i think this has caused my ECU to re set and my car wont tick over properly, Is going in monday to be done.

[jdearden]

ow well hopefully new manifold and exhasut being done next week so hopefully will sort it. just waiting on a tail pipe to arrive the whole country seems to have sold out i have one just need 1 more

[mgbond]

I have had this before. (mines a 2.5). I had a bit of a back fire and all the ste on the butterfly blew off leaving a slightly bigger gap so more air more revs. just turnt the idle scre back and reset the throttle position on the ECU.

Bondy

[jdearden]

tried this the idle is fine at first then once warms up it goes really high

[Gadgeroonie]

what engine/ecu have you got ?

[jdearden]

2.5 with mbe

[daddysumo]

Check there is no air leak to the MAP sensor.

[humpy]

jdearden said:

car is running fine apart from whole in manifold

Be cautious with holes (or cracks) in the manifold on the 2.5. They can let air in which can produce ‘flaming’ (through oxygen) onto the lambda sensor which sits in front of the turbo. The ‘flaming’ can disintegrate the lambda sensor; if this happens, bits will go into the turbo and cause a failure. I would take it nice and easy until it is fixed/replaced.

[jdearden]

daddysumo said:

Check there is no air leak to the MAP sensor.

where is the map sensor