Fuel Delivery Problems

[mike23109]

I'm running a rather basic Edelbrock Pro Flow on my SBC. It's worked great for about 3-4 years. Recenty, I've experienced fuel pressure problems. I'll be driving along and the fuel pressure will unexpectedly drop, causing the engine to go lean and backfire. I figured the pump was going bad and replaced it. I decided to go for the next larger pump Edelbrock makes. I also changed the fuel filter while I was at it. I was driving around Reno the past week (at Hot August Nights) and again experienced a drop in fuel pressure. This time the engine stalled and would not restart for over an hour. The new pump was only a week old. I called Edelbrock and they warrantied me a new pump. I picked it up at Summit and installed it. Since it is pretty hot in Reno this week I also decided to wrap the pump in some heat insulator material from DEI. The next day I experience the same problem while cruising on I80, from Reno to Truckee. No fuel pressure, engine stalled. Not fun! I know I could not have had three bad fuel pumps. The problem almost seems like vapor lock but I've not experienced the problem until recently. Could my fuel pump relay be bad. This is an intermitant problem and I'm thinking it could be electrical but don't know where to begin. Any ideas?