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1997 T4 Misfire when left and the reused when hot S40-V40

posted by  someone claiming to be sebking on  Sat Nov 6 04:19 CST 2004 [RELATED]

My 97 T4 has a fault the dealer has not been able to find for 50K miles!

If I make a journey so the engine is hot then park for approx 20 mins when I then restart the engine the idle jumps from 50 to 900 rpm and keeps doing this. When driving it clearly is not firing correctly.

Stopping the enging and then starting seems to cure (or if it stalls and is restarted)

Dealer wants to keep it for a few days (which will cost and they are not happy about giving me a loan)

ECU was replaced at 34K to stop the cutting out at high speeds!!!! (a known fault)

Any ideas - current mileage is 80K

Seb







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    1997 T4 Misfire when left and the reused when hot S40-V40

    posted by  someone claiming to be Miker on  Mon Nov 8 06:47 CST 2004 [RELATED]

    Seb

    Here is a WAG.

    Could it be a temperature sensor that makes the computer think the engine is still cold even though it is warmed up?

    If computer thinks engine is cold it will dump gas like no tomorrow. Since it is really warmed up it adjusts the incoming air to smooth out idle. Since it can't do this it keeps adjusting till it stalls.

    Restarting the engine may just correct the temperature intermitency problem.

    Miker







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