Engine Stalls

[Joe Tracker]

I want your feedback. I have completed the following fuel tests. Where do I go from here? Also, the FPR on my 99 Tracker looks like your photo of the 8V instead of the 16 valve (the vacuum nipple on my FPR is dead center and facing forward instead of coming off the bell to the side).

Fuel pump tests completed:

1. 3 sec buzz test,
2. cap off (made no difference)
3. static pump (36 psi on the nose)
4. Leak down (held well above 25 PSI for several minutes).
5. Engine running (the psi did change when I gunned the engine, but tended to return to 36 psi over time).
6. Dead head shunt - 60 psi when I pinched the fuel return hose.

I also completed the FPR tests:

1. No fuel leaking from vacuum nipple (diaphragm intact).
2. Fuel at 45 psi when FPR vacuum line disconnected from the FPR. (returns to 37 psi as soon as vacuum line is reattached).
3. There is 19 Hg of vacuum in the FPR vacuum hose with the engine idling.
4. Testing the FPR using a MightyVac gage/pump and the vacuum hose to the plenum plugged:
a. The vacuum at idle in the hose to FPR was 19 Hg (I live in Arkansas at an altitude of 312 feet).
b. It took 22 Hg of vacuum from the MightyVac to the FPR vacuum nipple to return the fuel pressure to 35/36 psi.
c. At 27 Hg the fuel pressure was 32/33 psi.
d. The FPR passed the leak down test easily (8 Hg for 30 seconds).

I am prepared to do the MAF tests next, but want your advice.

Thanks,

Joe Tracker