93 nissan stanza step on gas pedal will not get pass 5
Car starts but stalls even in park when i step on the gas pedal installed new cap and rotor sparks and wires replaced vacuum lines trans and oil fluids fine just no power hard to even get it up to 30 mph sounds like something is clog . thanks for any help
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signs of a bad fuel pressure regulator. the vehicle runs rough, the engine will not start usually in the mornings. many times engine starts but stalls shortly after starting. a bad regulator can result in fouled plugs. black soot on plugs, blake smoke from tailpipe, running rough, stalling. you could have residue in fuel tank and need to change fuel filter again. have a very good day !!
Easiest diagnosis and fix is to replace the gas cap. Too many people do not recognize the modern gas caps are not like the old 70's where you had carbeurated engines. With the new systems a proper vacuum (you are spot on) is required. Since you can correct this problem by manipulating the gas cap it doesnt sound like anything with a vacuum hose, etc in the engine compartment. Sounds like the gas cap has failed and is not venting/passing air as it should. A valve in the gas cap is set at a certain pressure rating for your vehicle and all vehicles to vent gas vapors and allow air into the tank.. One to prevent explosion due to vapor build up and two to allow a certain amount of air into the tank. This valve is defective or broken on your cap. A new cap is about 11 dollars at the local parts store.
have a muffler place check the catalytic converter it may be clogged and needing a new one. or if you haven't changed the timing belt you need to do it right away. since they are made of rubber and need to be changed every 70000 miles. if it's the timing belt, if it breaks you'll need a new motor. you need to look into it before that happens.