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first you have to do fuel pressure test while engine running. The fuel pressure regulator is located on side of injector box
what about cap and rotor distributor have to be change
feel free to ask more info
hope it helps
Locate the fuel pressure regulator and remove the vacuum line and start the engine, inspect, if vac port leaks fuel , replace regulator, provided your vehicle is equipped with a vacuum operated fuel pressure regulator.
sometimes if a fuel pressure regulator goes bad , you will be able to smell fuel fumes under hood. a leaking pressure regulator will cause---hard starting, poor fuel economy, stalling, check engine light, gas smell under hood. also check all fuel lines under hood.
if has a fuel odor. it may be the fuel pressure regulator thats bad, it may be flooding out engine. a leaking regulator can cause hard starting, poor fuel economy, stalling, check engine light, gas smell under hood.
here are some signs of a bad fuel pressure regulator: the vehicle runs rough, the engine will not start(usually in morning) MANY TIMES ENGINE STARTS BUT STALLS SHORTLY AFTER STARTING. a bad regulator can result in fouled spark plus, and fuel milage will decrease noticeably. the only cure is to replace regulator. what makes it fail usually it gets a tear in the diafram and it cant maintain fuel pressure. hope this helps toolman,
It may be due to a failed/faulty fuel pressure regulator. I had this problem: easy start when cold, hard starting when warm/hot, and rotten egg smell from exhaust when warm/hot. My mechanic diagnosed a failed/faulty fuel pressure regulator, replaced it, and now the problems (warm hard start, smell) are gone. I have a '92 GT with L4 engine.