Replaced my cylinder 1 fuel injector yesterday since i had a missfire. Tried everything else and this one wasnt making the sound when i listened to it. Replaced it car ran great no miss or anything after about an hour the pup pup pup pup sound came back into the exaust. Also when i have the car sitting for a bit it takes awhile to turn over just cranks for about 10 sec's then turns over. I think that is because i drained the gas pressure out of the system be4 i pulled the injector and there are still some air pockets but not sure. I also get a white smoke out of the exaust now when i first start it up. Before i did my injector it looked like there was oil in the well so i replaced my valve cover seals and spark plug tube seals. Since cylinder1 wasnt firing maybe its finally burning off that excess oil now? Just so frustrated i can't completely get this problem fixed please help me :-)

 

Hey - so what are the problem right now? (i.e. post injector fix). Are your throwing any codes? Did you reset the ECU after replacing the injector?

 

Havent reset the Ecu yet but still getting the PUP PUP PUP sound burning white smoke

 

white smoke? sounds like a blown head gasket to me my friend.

 

Reset the ECU... see if you get any codes first... and what codes (if any).

 

White smoke is usually related to coolant - blue smoke is related to oil

Could be normal or it could be the head gasket on its way out
http://www.nissanperformancemag.com/...r04/ask_sarah/
http://forums.max-world.org/index.php?showtopic=3454

 

Now there is a really strong gas smell. Is the gas being injected on the exaust cycle? and if i use the software to turn off the CEL is that resetting the ECU or do i have to turn that screw?

 

and if i dont give it gas when trying to turn it on it doesnt turn over