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My 2002 toyota corolla altis 1.6J VVTi engine was overhauled. but after we finish and install the egine then start it, the engine does not have a stable idle it goes high & low. what should i do to make the idle stable?
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I'm pretty good with noises, but to answer your question, you're going to have to describe the noise itself. For example, at idle you hear a clicking, chattering, squeaking or rattle. If you can also let us know where the "noise" is coming from (engine, trans, drive axle) that would also be helpful. Try to be as descriptive as possible, so somebody can help you out. Most people have experienced the same issues and can help if given a better description.
run fault codes to find which sensors have not been installed correctly or are defective. Possible cam/crank position sensor faulty. It is very easy to miss a connection or incorrectly put a connection together.
Whats the milage on it?
you seem to have a serious leak, have you checked if it leaves an oil puddle after you parked overnight, if not, try that next morning.
Is is burning oil, do you see blue smoke come out of the tailpipe, if you do, then you are seriously burning oil, engine is asking for an overhaul...
Good luck...
The engine timing being faulty would be a very likely reason especially if all the cylinders have no compression. Less likely reasons could be forgetting to install a cylinder head gasket, putting the wrong size valves in the cylinder head, installing new valves without lapping them into the valve seats, loose spark plugs, and piston ring gaps that are lined up instead of staggered.
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