my Car went from running perfect to leaning out on top end causing knock. My alky Kit is function fine and set on 6 and I tested it to make sure it was operating. I even dialed my boost way back but still getting too end knock. I made no other changes to any settings. I’m thinking maybe my fuel pump might be going out so I wanted to test my FP at idle and under throttle to see what it was doing. Hoping for an easy fix.
Also.... is that fuel regulator adjustable .... if so.... how?
Thanks!!!!!
First off, the alky tester is great tool. You can run the pump and recycle the alky to find leaks as well as a bad pump. You might have found a leak but you have more than one that the tool can help you find. Even though you have a new pump, you may have a leak at a fitting that evaporates before you can see it.My alky pump is brand new....replaced my old one due to a small leak. I tested it using the button while at idle which makes the car stutter and start to shut off. Not sure on my fuel pump’s age but I’m guessing it’s pretty old but I did get a FP tester and her is what I discovered.
Ignition on - 35 -37 psi
Idle - 42 psi
Driving no Boost - 42-43 psi
15 psi boost - 56-58 psi. ( with the tester gauge on I actually got very few knock numbers) . I usually run 19psi of Boost but turned it down due to the knocking issue I was having. Even then the last time I drove it I was getting some 5.0-6.0 knock numbers.
3 runs from about sixty in drive (D) with no shifting
760 - 0.0
767 - 1.2
785 - 0.2
Last time I was getting substantial knock on my Scanmaster. Still has a weird on and off surge at lower speed casual driving. Once you give it some moderate throttle it goes away.
Aso544