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Discussion Starter · #1 ·
I just bought a 4.0l and the rpm is very high and seems to rev up when changing gears,
On idle it’s 1200 rpm
It drops when I take off with clutch in,
What could it be ?
 

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Discussion Starter · #4 ·
One thing is when I rev it stays at around 3000 rpm then there is a tssssss sound from the engine bay and it drops to 1200 sorry for sounding dumb but there’s no other way of explaining it
 

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You may want to try the idle re-learn procedure to see if it fixes it, or it could have a large vacuum leak, but I would think if it was, it would throw a code.
 

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You may want to try the idle re-learn procedure to see if it fixes it, or it could have a large vacuum leak, but I would think if it was, it would throw a code.
I second that I forgot to hook up the breather that connects to the air intake and got a code a day later. Try to do an air idle relearn and I would think that would fix it.


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