I have a 1999 chevrolet 3/4 ton four wheel drive suburban. It has the 7.4 (454) with supercharger. This truck is very high performance. I have changed my fuel pump twice now and nothing can keep up. The first one I put on was just a stock GM fuel pump....it worked as long as you did not want to go fast...lol...so then I tried a high performance OEM...It would not even idle...so now what? I'm actually at a loss. I really don't want to take it to a shop for a $1,500 bill just to tell me which one to use...so if you have had this problem or know how to fix it please tell me!!! Thanks a bunch
-CaseyNeed fuel pump for 99 chevy suburban very custom and high performance. 454 supercharged. what fuel pump to use?
A holley black pump works great ,but it doesn't sound like it could be just the fuel pump problem you have regulators and injectors and also the size of the hard line to factor in.I would mount a gauge on the shrader valve and monitor the amount of pressure you are getting to make sure it meets the supercharger requirements. 32-38 lb should be fine.Need fuel pump for 99 chevy suburban very custom and high performance. 454 supercharged. what fuel pump to use?
Call Summit racing in Ohio and their customer service rep. will point you in the right direction. I use them alot because of the customer service. Good luck, Mike.Need fuel pump for 99 chevy suburban very custom and high performance. 454 supercharged. what fuel pump to use?
Sounds like you have an additional issue, even a stock pump will provide enough fuel at idle, it should only be at high rpm that the motor would starve. As stated above you may need to up grade the rest of your fuel system (injectors).
