Thread: car breakin up

my car breaking up at low rpm when reving with alot of black smoke. i need 2 try some other injectors (i have msd 50lbs) just 2 check. i have so rc's 550cc would this work? (inpendence?)

What's your fuel pressure gauge setting?

stock regulator

Sounds like a possible MAF issue. Check the pigtail or if it may have come loose. Maybe a boost leak somewhere?

turn the key ( car off) whats ur maf reading?pressure test your ic pipes

what are your plugs gaped at to how much boost are you running

If the car is puffing black smoke that means the fuel mixture is way to fat.

As for the injectors if you choose to run the RC's make sure you know what impedence they are. You can call RC and they will tell you.



This may be another problem. If you are running a Walboro your fuel pressure may be through the roof. Do you have a FPR gauge? Also invest in a adjustable regulator. Especially with a turbo car.

yep a walboro can make the stock fuel pressure go up by 3psi. if your running a z32 fuel filter the pressure will increase by another 2psi

what is the ecu programmed for. 50lb=525cc/min so 550cc will be to big on a 50lb fuel program.

my car breaks up as well under low rpms wideband is reading lean tho, it only doesn't it when I first crank it up.