So i replaced cylinder head because cam gear spun. after i got it all back together started car and now it idles high and revs up and down. do i have the timing off ?
Agree with Steve P. Possible vacuum leak.
SOURCE: high revs
being a fuel injected engine , there are many reasons this could be happening.
from the top , lets check the Manifold Absolute Pressure (M.A.P.) sensor , as it is easiest.
Find the MAP sensor , it has a couple a wires and a vacuum tube going to it and is on the firewall or fender support under the bonnet.
Disconnect the wire harness from it (small plug with wires).
If the engines RPMs drop to normal , replace the MAP sensor.
There will be marks on the cam gear and the crank gear. Some are dots, some are diamond shaped. You just line the two up so the top mark is directly over mark on the crank. You may have to turn the crank by hand which is easier with all the plugs out, to line it up. You will want to drain oil,change filter, and put in new oil to get rid of contaminated oil in oilpan.
If you fail, you are not talking about a lot of money to try to fix the top of the engine compared to engine replacement. For the most part, you could still tow it.
You could ask how much it would cost just to replace the gasket and let someone else bust their knuckles.
SOURCE: 2500 to 3000 rpm idle
Change your Thottle positioning Sensor. My 93 lesabre did the same thing and i changed the TPS and it stopped.
SOURCE: Car revs high when not in gear, but still revs
Timing has been adjusted to high, or the spark advance is out of adjustment causing the revving
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