I own a 97 GS non-turbo with a 420-A engine.
Ok this past weekend, I had a friend of mine who used to work at a Mitsubishi Dealership change my timing belt and tensioner puller and idle pulley.
The job went sorta perfect, he triple checked everything (the timing marks and other marks) but now when I first start my car the rpm will rise (like normal) then start to fall back down to idle speed (like normal) but when it gets to 1k rpm it will stay there for a second with a constant but rough idle, then it will drop to 800rpm and bounce from 800 to 900rpm / it feels as if it wants to stall.
So has anyone else had this problem?
Symptoms before timing belt change = nothing, power and idle were normal in all rpm's
Symptoms after timing belt change = rough idle but power is normal with no loss in all rpm's / it is as strong as it was before
In my opinion what it feels like at idle now is like when you are sitting in a muscle car with a cam job, the car vibrates a little more then usual and the exhaust hesitates / coughs which makes the car vibrate more in spurts.
So does this sound like the mechanic set a gear one tooth off or maybe he forgot to install a vacuum line that he removed to do the timing belt or what?
Im at a loss and Im taking my car back to him this weekend and it would be cool if I had some insight on what to tell him to look for. Thanks.