My girlfriends aunt gave us an old 87 Buick Century for $200. We had the car towed home because it had a bad fuel pump. I dropped the tank, replaced the pump, pulsator, and sending unit. I also cleaned the tank. My girl decides to drive this ol beater to the store and it stalled on her. She got it started and drove it back home.
I hooked up a fuel pressure gauge to the rail and turn the key. The gauge shot up to 5 psi and then fell to zero. I was like okay Houston we have a problem. So I start going thru drawers and I find an old fpr from my TR...happens to be the same part. I replace it and the same thing happens. Turn the key, FP primes, gauge goes to 5 psi and drops to zero.
In order to start the car I have to crank the motor 6-8 seconds before it starts. As the car is cranking the fuel pressure raises from 0 and kicks over at 10 psi. While the car is running FP stays around 25 psi. If I pull the vacuum line off there is no change in idle rpm. Once the car is shut down the car is not holding fp....it drops to 0 as fast as you can turn the key off.
So I went to AZ and picked up a POS GP Sorenson replacement. I threw it in and the same thing happened.
Is it possible that the fuel pump I installed is a POS and is not holding pressure? I was thinking that maybe there was an injector stuck open but the pressure drop is occuring way too fast to be an injector. Any thoughts fellas?
I hooked up a fuel pressure gauge to the rail and turn the key. The gauge shot up to 5 psi and then fell to zero. I was like okay Houston we have a problem. So I start going thru drawers and I find an old fpr from my TR...happens to be the same part. I replace it and the same thing happens. Turn the key, FP primes, gauge goes to 5 psi and drops to zero.
In order to start the car I have to crank the motor 6-8 seconds before it starts. As the car is cranking the fuel pressure raises from 0 and kicks over at 10 psi. While the car is running FP stays around 25 psi. If I pull the vacuum line off there is no change in idle rpm. Once the car is shut down the car is not holding fp....it drops to 0 as fast as you can turn the key off.
So I went to AZ and picked up a POS GP Sorenson replacement. I threw it in and the same thing happened.
Is it possible that the fuel pump I installed is a POS and is not holding pressure? I was thinking that maybe there was an injector stuck open but the pressure drop is occuring way too fast to be an injector. Any thoughts fellas?
