88 all trac falls on its face under acceleration

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Re: 88 all trac falls on its face under acceleration

Postby lt2fire » Tue Oct 16, 2018 12:43 am

Well tested the fuel pressure...…. at idle it was high around d70 PSI and went off the chart when rev'd.

This could be a separate issue but would this cause the issue i'm having. I know its either a kinked line or a bad FPR causing the high pressure.
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Re: 88 all trac falls on its face under acceleration

Postby lt2fire » Sat Nov 03, 2018 5:54 pm

This is what it is doing for fuel pressure.

This first one is in the engine bay at idle and slightly rev'd

second one is in the car reving.... also shows what it does when it get to a certain rpm and also the fuel pressure shoots off of the scale.

https://www.youtube.com/watch?v=ysqbVaV9yAE

https://www.youtube.com/watch?v=IfB9XYSgl9I
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Re: 88 all trac falls on its face under acceleration

Postby lt2fire » Fri Nov 09, 2018 10:13 pm

replaced the FPR. No change exact same thing... next to check the fuel return line to see if blocked
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Re: 88 all trac falls on its face under acceleration

Postby 88gt4DE » Thu Nov 15, 2018 10:15 pm

Have you had any of the fuel system apart ? replaced filter ? had a visual of inside of the tank ?
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Re: 88 all trac falls on its face under acceleration

Postby lt2fire » Mon Nov 26, 2018 5:14 pm

FIXED!!!!!!!!!!!!!!!!!

So after everything and replacing a few parts it turned out the entire problem was a 5 cent part.

The Previous Owner used the wrong type of washer on the fuel pulsation damper and it wasn't letting enough fuel through hence the super high pressure when measured from the filter.

Put the correct one in and now it runs like new.

Will post pics of the incorrect and correct one later.
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Re: 88 all trac falls on its face under acceleration

Postby 88gt4DE » Mon Nov 26, 2018 9:34 pm

Get out ... you gotta be kidding me. :twisted: :bangshead:
Rob
1988 ST165 - 78K - Project ---> http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=31483&start=240
2000 Toyota Tundra SR5 - 165K - Thanks 97JZA80
2007 Toyota Rav4 - 130K - My girls DD
2003 Toyota Camry - 151K - DD - Highway Runner
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Re: 88 all trac falls on its face under acceleration

Postby lt2fire » Fri Nov 30, 2018 4:49 pm

Nope.... runs fine after correct washer was put in. I replaced the fuel pulsation damper also because I couldn't get the incorrect one off.

one on left is correct one of right you can see the washer pretty much stuck in the groove.


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Re: 88 all trac falls on its face under acceleration

Postby underscore » Sat Dec 01, 2018 11:13 pm

Nice work figuring that out!
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Re: 88 all trac falls on its face under acceleration

Postby 88gt4DE » Wed Dec 05, 2018 9:03 pm

Holy crap .... well it was the fuel system ... but damn I'm not sure i would have found that one very fast either. Very rare you mess with one of those damn things. :crazy: Soooooo hows she run ???? 8)
Rob
1988 ST165 - 78K - Project ---> http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=31483&start=240
2000 Toyota Tundra SR5 - 165K - Thanks 97JZA80
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