SOURCE: Why doe's my car idle high and low Why doe's my chery tiggo 2.0 auto idle high and low
Try disconnecting the battery black cable for 5 minutes to reset the idle speed. Also make sure you don't have an issue with air trapped in the cooling system, did you bleed the air out?
SOURCE: My Chery tiggo 1.6tx 2010 model is jerking while I driving
My Chery J11 (same as Tiggo) 2 litre automatic has had jerking on two occasions.
The first time was at 60,000km. The gear symbol on the dashboard was showing and the automatic transmission was making funny noises. I drained the automatic transmission fluid, very little came out so the fluid level was obviously too low, refilled it, and the problem was fixed.
The second time was at 94,000km. I didn't know whether it was the engine, the ignition system, or the transmission, as it was jerking and the transmission was trying to change up or down. I could only drive it very gently, or in manual mode (tiptronic).
I noticed that the engine was faltering in neutral, so decided to start with the easy stuff, the ignition system. I changed the spark plugs and the problem disappeared. The spark plugs looked OK! One of them had a small brown stain on the ceramic inside, but really, it looked fine. Anyway, that fixed the problem.
PS I agree totally with Bob Kirkwood's answer, could be spark plug/leads or fuel delivery.
SOURCE: chery tiggo, 2004, 2.0at the car will not start after stopping,
Vapor lock is a possibility if it fails to restart after a trip. More detail will be very helpful.
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