My car has a miss fire at low rpms 1500 and down.When I first start the car it runs rich and some black smoke comes out the rear after a few revs the gas smell goes away,but under light throttle you can fill the car missing.Also If I am going down the road and floor it their is a delay befor it takes off.But at high rpms I don't fill a miss.I canged the cap and rotor and wires and plugs; but the it is doing the same thing.I have felt gas leaking out of the fule presure regulator.I am thinking its eather the regulator or the injectors.What do you guys think?Thanks

 

Did you change the plugs before or after? Make sure they are gapped correctly, if not it will miss at low rpms and do EXACTLY what your explaning, happend to me like a week ago lol.

 

when I get the chance I am going to take the plugs out and check them.

 

Would a bad coil cause the same thing to happen?

 

if you got fuel coming out of the vacuum port of the regulator you absolutely, positively, need a new regulator. when you pull more engine vacuum, like at an idle, you will suck more fuel into the intake through the regulator. not to mention your fuel pressure will prob be off.

 

Ya it dosent happen all the time but some times I get a strog gas smell and when I put my hands on the regulator my had comes back full of gas. I am not shure where its leaking from but if it dose start it stops once I worm it up.

 

What kind of regulator should I get stock or adjustable.Car is a 1996 z28 lt4 hot cam kit and full bolt on's.

 

Ok I checked out the plugs and wires; they are all good.It seems to be geting worse I can't even spin the tires off the line;but it powers up a few seconds latter.

 

Now that I think about it the car wasent missing untill the cam swap.And I diden't install the opti my budy did.Could he have installed it incorrectly.The car can't even burn rubber it was faster befor the cam.

 

How would the car act if the opti was put in wrong.