Gregg wrote:Thanks Gunni and Eck. I wrapped the threads with the yellow tape and seems to be holding for now. No leaks.
Took it for a test drive around the neighborhood and it wasn't good. Lots of sputtering on acceleration. Idles fine. 32 psi on the fuel pressure gauge. Yes, the hoses are hooked up correctly. No kinks in the hoses. Both pumps are getting power.
What else should I check?
Seems like it hasnΓÇÖt been hot enough to be vaporlock.
How long does it hold the 32 psi after you shut it off?
Throw a new fuel filter at it, I had the same issue when I redid my fuel system. Actually did a quick little ΓÇ£deleteΓÇ¥ just to see if anything changed as I drove around the block. (Probably not smart so do at your own risk I suppose) Sure enough it ran perfect so I ordered a serviceable one right then so I can pull and clean it out wherever I am.
My set up is very similar to the pic Eck posted up. Tank---NEW cheapo filter---LP pump----accumulator----HP pump---NEW filter---injectors---Return to accumulator---tank
32 psi and was at 22 psi an hour or so later
What's a quick little delete?
Eck-What post HP filter do you use?
Last edited by Gregg on Fri May 21, 2021 7:19 am, edited 1 time in total.
Bypass the filter for testing purposes is what I meant. If the filters are both new that shouldnΓÇÖt be the issue then. What cheap filter are you using?
Gregg wrote:My set up is very similar to the pic Eck posted up. Tank---NEW cheapo filter---LP pump----accumulator----HP pump---NEW filter---injectors---Return to accumulator---tank
I'm still having problems with sputtering and occasional backfire when accelerating or putting load on the engine (going up a hill). I tried going without the hp filter but that didn't change anything.
Primed and after the engine is off the psi is 40 Idle psi is 34 Before I go after the injectors is there a way to test the pressure regulator?
Jog my memory, this is a stock tank with the factory pickup/sending unit right? You might consider pulling the pickup out and confirming the ΓÇ£sockΓÇ¥ isnΓÇÖt falling apart and plugging the pickup.
Quick Update: I pulled the upper intake and got to the injectors. I soaked, cleaned, tested, and blew them all out. I ordered a rebuild kit and put it all back together. No change. Idles fine but sputters on acceleration or load. I had a spare hp pump so I threw that in and it ran the same as with the other pump. I guess I could through a new FPR at it but I'm guessing it won't change anything.
Primed psi is 34ish Idle psi is 34ish With Engine off it holds at 40 psi for awhile.
Not a stock tank but an older 22 gal (thanks for chimng in Kirk)
I replaced the FPR with a a new one and it didn't change anything. I'll post up on CB.com and get a few more opinions. Feel free to chime in if you have any thoughts. Thanks guys!
I'm just stabbing at this, but could it be a dirty mass air sensor or bad TPS?
"America is at that awkward stage. It's too late to work within the system, but too early to shoot the bastards." ΓÇô Claire Wolfe
74-AWB 98", ZF5, Atlas4, HP609s, ARBs, 37's, 3.5" lift-5.5" front coil springs, Tahoe rear springs, EFI 302, h-boost, 4x4x2 hyrdo assist, custom dash & gauges
72 U15- Explorer Sport-Candyapple Red (1 of 141)
It "was" a mustang efi but we swapped it over to the explorer harness and coil pack a few years ago.
Oh, I changed my air filter and cleaned the MAF a couple months ago
As for the TPS---if it were faulty, would it sputter if I rev -ed it in park/neutral. Only asking because when I rev it in neutral it sounds / responds great.
Well the good thing about the explorer EFI is you can hookup a good scanner and look at all of the sensors while they are working. You can also see if it has any codes stored. I might know a guy with a scanner.
I videoed the FP gauge driving around the hood: idles at 36 psi and during acceleration it'd go up to 40-41 psi. I figured the FPR knows what its doing but could there be too much gas and bogging the engine down?
Gregg wrote:Is it close to " Larry the Cable Guy"?
I videoed the FP gauge driving around the hood: idles at 36 psi and during acceleration it'd go up to 40-41 psi. I figured the FPR knows what its doing but could there be too much gas and bogging the engine down?
More like Kevin the scanner guy.
I think your fuel is fine at this point. Need to start looking at other things. Burnt plug wires maybe?
Gregg wrote:Is it close to " Larry the Cable Guy"?
I videoed the FP gauge driving around the hood: idles at 36 psi and during acceleration it'd go up to 40-41 psi. I figured the FPR knows what its doing but could there be too much gas and bogging the engine down?
More like Kevin the scanner guy.
I think your fuel is fine at this point. Need to start looking at other things. Burnt plug wires maybe?
Looks like I owe Phil a case of Corona
Cylinder #5 wire looked suspicious. I checked the resistance and it was clear that nothing was getting through. The wire looked okay but inside the boot was really corroded. I cut the wire above the boot (tested it again with an acceptable reading) and replaced it with my spare boot/crimp. It actually ran slightly worse so I cleaned the spark plug terminal (also corroded) and that was it. Back on the road for now.
I thin k it was corroded because my PS reservoir is making a mess of anything that touches it. The coating on the wire was looking rough so I'm guessing the PS fluid made its way down to the boot...Time to get more spare boot/crimps.....
I love fixing one thing while another thing unknowingly fails and f**ks up the whole trouble shooting process. Nice catch Phil. Thank you!
Corona 
