Have a 1984 300zx, non-turbo two seater. 124K Have put lots of new parts on it but still have two minor problems....Engine bogs down and hesitates when gas pedal is depressed. And, when warm car does not start (or run well). Appears to be too much gas or not enough air because there is a little bit of black smoke. Are these problems related or separate? What would be the common cause of these problems answered by someone who really knows this car? Please advise. Thank you.
Was the car in storage for a long time? when stored or carburetor gets old gaskets tend to crack and leak also varnish builds up inside and affects performance causing rough running and poor performance. a good hot rod mechanic has more experience than most regular mechanics(who work mostly on fuel injected engines) and can clean and adjust or diagnose what the issues are and rebuild if carburetor needs to be.
Its running very RICH !!!! TOO MUCH GAS!
check the air fuel mix & the air filter!
it needs a good tune up!
& get the injectors either cleaned or replaced
the fuel injectors from the factory are renound for leaking & setting fire to this model!
you can buy aftermrket injectors that eliminate the this
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