1.8 cold running - jerking, or hunts/stalls
I have a 2000 W reg Rover 75 1.8 manual (non turbo) with a strange issue when started from cold (as in a cold engine..... the weather is irrelevant) and it’s fine as soon as the temperature gauge moves.
If I start up, drive down the road and lift off the throttle in say second gear, the car will jerk/kangaroo. To avoid this jerking I dip the clutch before lifting off the throttle. What happens then when I dip the clutch is the engine hunts and often stalls unless you rev it a bit. If stationary and I blip the throttle, as the the engine revs rose, it sort of skips/jumps at approx 1800-2000rpm. I had this exact issue on a 2000 W reg Rover 45 1.8 10 years ago, and in 6 years I NEVER got to the bottom of it! I have changed the 02 sensor. No difference. |
Not inlet manifold gasket is it? Check plugs for coolant. Also try resetting the IACV, ignition on, don't start the engine, press accelerator pedal 5 times quickly, ignition off. Restart the car. All I've got for now:}
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A fine crack/tear in the vacuum hoses - :shrug:
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engine coolant temp sensor ? cant you run the ipk temp diagnostic to check ?
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New inlet manifold gasket fitted last year when head gasket was changed.
Plugs look good. Temp reading fine. I’ve ordered a second hand throttle body and new idle air control valve. I don’t think it will make any difference as I changed these on my 45 and nothing changed. |
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Make sure that the throttle cable is properly adjusted with a little slack to allow the arm to rest on the throttle stop at idle. My Rover 25 came to me with similar problems, I found that the throttle cable in previous ownership had been overtightened to get the revs up to try to mitigate a stalling problem from cold. I adjusted the throttle cable correctly and it solved everything bar the stalling problem which was more evident without the bodge of the overtightening. It took a T4 session to get the car running better and I think the base idle index is still in need of some attention but I hardly use the car and it runs in the main well enough for my needs for now. I hope to get it fully sorted in time but other things to sort keep getting in the way. :getmecoat:
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