Quote:
Originally Posted by 5ABI VT
Glad to hear you figured it out was it a hesitation like mine ?
I'm also going to take everyone's advice on the stainless clamps and do that for sure . I will feel happy to find a broken plastic clip but not expecting it!!
Here's a clip I made last year and while I have had other symptoms of my clutch being worn in this case it can be felt and my rpms aren't slipping and rising which is a common clutch -slip symptom but I can feel and hear the delay in acceleration when hitting the next gear and it has made me suspect the pumps. I have changed plugs, wires, coils, injectors, o2 sensors and the map sensor. This video was taken after it all. Leads me back to the beggining .. 
Around 14-15 second mark in the video.
https://youtu.be/bH7F59FKPEU |
I doubt you will find a broken plastic clamp but they just don't clamp and seal well. The two pumps "Y" into a single outlet pipe so as the pressure builds, the pipe connections leak and, as time goes on, it gets worse. In my case, I believe I was experiencing the inability of the system to deliver adequate pressure during hard acceleration. I did not try taping my fuel gauge to the windshield but I bet it would have proven me right.
As to the check valves, they shouldn't make any difference when both pumps are running but when the secondary pump turns off during normal driving, the primary pump will short cycle back through the "Y" pipe, into and out of the secondary pump, which will hurt system pressure. In my case, I believed this caused my primary pump to begin intermittent failure. I could drive for short time and "run out of gas". I could then turn the ignition off and restart immediately because the secondary pump would kick in and deliver system pressure.
When I installed my primary/secondary reverse harness, the problem didn't go away because both pumps had the same issue with bad check valves.
When I put the new pumps in, with the steel clamps, the intermittent failures stopped and the performance increased dramatically.