I have had my 94 Z28 for a little over 2 years now. I have had very few problems with the car, until recently, it has 88,000 miles on the clock, and it now started doing some oddball stuff. Recently, only when its bone cold, it stumbles really bad, but when it warms up it would be fine, I ruled it out as being the opti, So I ordered one. Then yesterday, I went to start the car, and it just sat there, key cranked, and it would turn over like normal, just wouldn't fire. I pulled out the fuel pressure guage, and low and behold, I am getting just about 19lbs when its at idle...

So, I'm thinking its time for a fuel pump upgrade. I plan on running either a supercharger, or nitro on the motor in the near future. So would like a 255lph pump be ok. Right now, the only things done to the car, are a gutted cat, a Dynamax exhaust, and a dirty k&n filter. Would the car run ok using the bigger pump with out having any other mods? If so, What pump would you guys suggest going with.

 

255lph intank. It will run fine with your current mods, and give you increased fuel volume for more major mods down the road.

 

no adverse affects?

 

Your fuel pressure is controlled by a regulator. Whatever fuel that isn't used by the engine is returned to the tank via the return line. It's all good.