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Originally Posted by manjijima
ok so i just got a 92 fastback. twin cam, i have a few questions...
the engine has some knocking noises from the top. im guessing due to the timing chain gaurd problem?
2nd when i start my car, the idle bounces up and down. sometimes drops so low it stalls. so i have to give it some gas to stay up. anyone know what kinda problem this might be?
3rd im getting pretty bad gas milage. at about half a tank i got only 110 miles. havent gone through the whole thing yet.
is there anything i can do or change to make my car running top shape? thanks
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Are the noises more of a knocking, or a ticking? Ticking can be lifters/chain. The problem with starting the car is probably a dirty IACV, mine has it, a lot of older Nissans have that (the valve lets air in during idle, it gets dirty and sticky, so car dies unless you hold gas in at start up to open the throttle).
For gas mileage I would check for leaky injectors, clean up your maf and throttle body...basic tune up stuff like they said.