Update With Fuel Issue

[mustangramair]

I finally figured out what my problem was last week. As some of you may remember, my car was flooding out and the gauge was pegged at 80 PSI. Well, my fuel pump broke and was pumping at max capacity which blew my regulator out, which saturated my charcoal (sp) canister, and all the excess fuel fouled my spark plugs out. I put back in my stock regulator and fuel pump, replaced the canister, and put new NGK spark plugs in and the car runs great again.

Thanks for all your guy's input, I appreciated it! I just thought I would let you know about the domino effect that happened to my car. Hopefully this will help someone if they run into the same problem as I did, it was a major headache trying to figure out what happened.

 

[tunedin302]

This is educational to me. I always thought that the fuel pump in a mustang was either on or off meaning it pumped at max when it was on or not at all as when off. I thought the regulator is what actually controls the amount of fuel that the motor see and the rest of the fuel is returned to the tank via the return line. Is this not the case? I know Aeromotive makes a fuel pump controller which regulate the voltage going to the pump based on the engine RPM thereby reducing the flow output of the pump but I didn't think our cars had anything of the sort. Thanks.

 

[mustangramair]

I initially thought I had a bad regulator, it only had 2500 miles on it. I then replaced the BBK with a Kirban and it ran for about 10 seconds at normal fuel pressure then sky rocketed again. I had to take the car to the shop to have them replace the fuel pump, they were the ones who told me the deal with the fuel pump. I know it was putting out too much fuel because I went through two good regulators, the Walbro 190 lph fuel pump puts out a max of 100 psi and the BBK regulator is good to regulate up to 70 psi I believe. So it seems to be the fuel pump was blowing the regulators out.

This is my theory on what happened, if anyone has a better understanding on how our fuel system works and what they think happened, I am always will to learn.