How do I fix this?
Thread Starter
Newbie
Joined: Oct 2004
Posts: 32
Likes: 0
From: Newport News, VA
How do I fix this?
Installed Cams (cosworth 272), valve springs and retainers, cam gears, and timing belt. Ran and idled fine with stock ECU (didn't drive it).
Next day changed fuel pump to Walboro 255. Now the car turns over but wont start. Got it to run briefly but had to feather the throttle and it wouldn't find idle. Got fuel to the rail, no check engine light or codes.
Tried going back to stock pump and problem persist so went back to Walboro.
Any ideas?
Next day changed fuel pump to Walboro 255. Now the car turns over but wont start. Got it to run briefly but had to feather the throttle and it wouldn't find idle. Got fuel to the rail, no check engine light or codes.
Tried going back to stock pump and problem persist so went back to Walboro.
Any ideas?
comprehend the first line. IT RAN FINE. how do i know?? i did the install. no changes were made. let the car sit overnight in the garage after install of said parts.
next morning installed fuel pump. car wont start. it want to fire, but doesnt. pulled fuel pressure regulator to "burp" the system. getting plenty of fuel at the fuel rail. didnt check pressure. okay, hmmmmm.
reinstalled factory pump. same scenario. doesnt want to start. cranks over, wants to fire up, but doesnt.
i was thinking it may be a immobilizer problem. dont think so. had him pull his AEM out and install that to see if the car will fire up. same thing. not starting up.
next morning installed fuel pump. car wont start. it want to fire, but doesnt. pulled fuel pressure regulator to "burp" the system. getting plenty of fuel at the fuel rail. didnt check pressure. okay, hmmmmm.
reinstalled factory pump. same scenario. doesnt want to start. cranks over, wants to fire up, but doesnt.
i was thinking it may be a immobilizer problem. dont think so. had him pull his AEM out and install that to see if the car will fire up. same thing. not starting up.
Thread Starter
Newbie
Joined: Oct 2004
Posts: 32
Likes: 0
From: Newport News, VA
We got it fixed.
On the fuel pump housing there is a sensor or something that plugs into the bottom of the chamber the fuel pump feeds before being sent out to the fuel rail. The o-ring that goes around it apparently became lodged into the opening going out the top of the fuel pump housing. So, insufficent fuel pressure.
What's really odd about this is that we never removed that sensor before. So how it got stuck in there I'm not srue. Only thing I can think of is that it may have moved some with the tilting and turning of the housing while changing the fuel pump. Then, when the pump started going it tried to shove the o-ring through the hole.
On the fuel pump housing there is a sensor or something that plugs into the bottom of the chamber the fuel pump feeds before being sent out to the fuel rail. The o-ring that goes around it apparently became lodged into the opening going out the top of the fuel pump housing. So, insufficent fuel pressure.
What's really odd about this is that we never removed that sensor before. So how it got stuck in there I'm not srue. Only thing I can think of is that it may have moved some with the tilting and turning of the housing while changing the fuel pump. Then, when the pump started going it tried to shove the o-ring through the hole.
