no start after replacing fuel pump
Thread Starter
Heel & Toe
Joined: Jul 2006
Posts: 20
Likes: 0
no start after replacing fuel pump
My '89 began to stall at low speeds. After I replaced the fuel pump and filter the car would not start. I then replaced the fuel regulator and still will not start. The fuel pump comes on for 2 seconds when the ignition is on and is pumping over a half pint of gas at the manifold when energized for 15 seconds manually. The injectors are getting 12 vollts. when I put starting fluid in the intake manifold the engine will run for about 5 seconds. Seems there is not enough fuel pressure at the injectors. Please help, thank you.
Burning Brakes
Joined: May 2004
Posts: 1,230
Likes: 27
From: Athens Ohio
I installed a fuel pump I bought from autozone. I wired it acording to the instructions. I should have looked at the one I took off closer. The instructions had the wiring backwards and the car wouldn"t run. I pulled one of the fuel lines at the pump an seen it wasn't pumping. I pulled it again and reversed the wires. The problem was solved. The instructions were wrong. It did run for two seconds priming the pump though, problem was it ran backwards.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Originally Posted by jam04
The fuel pump comes on for 2 seconds when the ignition is on and is pumping over a half pint of gas at the manifold when energized for 15 seconds manually.
Also as suggested, make sure the fuel pump connections are correct, make sure the filter was put on correct, and that the spring and diaphram are in right. If you can spray starting fluid into the intake and it run, then you have a fuel problem, as of now. You can push the schrader valve down and fuel should come out (under pressure), but you want know how much pressure is there without a fuel pressure guage. The oil pressure switch is a back up to the fuel pump relay and will start the engine when 4 psi has been met while cranking.
Try these few things and get back.
