1991 V6 Pickup Fuel problems please help!

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1991 V6 Pickup Fuel problems please help! #476838 07/16/04 01:26 AM

Anonymous

Unregistered

I have a 1991 toyota pickup and It is vapor locking I think the pump is getting weak Is there any one who knows how to do a fuel pressure test on these . or anyone had this problem found something else wrong?

Re: 1991 V6 Pickup Fuel problems please help! #476839 07/16/04 10:25 AM

Anonymous

Unregistered

Ok Joe, What makes you think it's vapor locking? A little more info please! The fuel pressure is supposed to be at 38 - 41 psi, you'll need a fuel pressure gauge.
Give us some more detail Joe and we'll help you out!

Good Luck! <img src="/forums/images/graemlins/kewl.gif" alt="" />
* Harry *

Re: 1991 V6 Pickup Fuel problems please help! #476840 07/16/04 06:34 PM

Joined: May 2004

Posts: 15

San Diego, CA

natebear

Need a Spot

similar issue to mine?
My fuel problems

haven't solved it yet, but have creatively worked around it for the time being...

good luck! <img src="/forums/images/graemlins/cheers.gif" alt="" />
/natebear

1992 V6 XtraCab SR-5 Manual with 32s and 4.556s

Re: 1991 V6 Pickup Fuel problems please help! [Re: natebear] #476841 07/16/04 06:53 PM

Joined: Jan 2000

Posts: 12,153

N. California. USA

4Crawler

Web Wheeler

Two things cause the fuel pump to operate. One is the STA contact in ignition switch and ECU (for starting) then once running the AFM "FP" contact closes to run the pump. Difficulty starting is often due to the STA signal not pulling in the circuit opening (CO) relay. My '85 has had this problem for a few years, I just run with the fuel pump test jumper installed.

Simple thing to try, if it helps, that is your problem, if not, its something else.

r.c.brown@ieee.org
TruckEditor@tlca.org
Project: 4Crawler
4Crawler OffRoad - 4x4Wire discount code

Re: 1991 V6 Pickup Fuel problems please help! [Re: 4Crawler] #476842 07/16/04 10:37 PM

Anonymous

Unregistered

still nothing and I checked the fuel pressure and I am about 45 psi before the fpr and after the filter.

Re: 1991 V6 Pickup Fuel problems please help! #476843 07/16/04 10:52 PM

Joined: Jan 2000

Posts: 10,859

Holly Springs, North Cackalack...

little_joe Offline

Former Admin

Check it on the rail and see if you get that reading.

Fuel pressure regulator perhaps?

4x4Wire's Toyota Section
1995 FZJ80 LandCruiser - 3 locking diffs, +200k mi, JD HIR's, 285/75R16 Nitto TG's
Olde North State Cruisers

Re: 1991 V6 Pickup Fuel problems please help! [Re: little_joe] #476844 07/18/04 04:36 PM

Anonymous

Unregistered

Fuel pressure good same there. It seems to be running wes today I found a radiator leak and fixed refilled with fluid that may have caused the intake to over heat enough to vapor lock. But I have a very low idle now is there away to adjust that?

Re: 1991 V6 Pickup Fuel problems please help! #476845 07/18/04 05:52 PM

Anonymous

Unregistered

Make sure that you have no air pockets! To adjust the idle, jump the "TE" & "E1" w/a paperclip and there's a large screw on the T-body, turn her up! <img src="/forums/images/graemlins/kewl.gif" alt="" />

* Harry * <img src="/forums/images/graemlins/kewl.gif" alt="" />

Re: 1991 V6 Pickup Fuel problems please help! #476846 07/19/04 12:35 AM

Anonymous

Unregistered

Good info thanks I am going to try that tonight, My truck has alot of demons but its a great truck all around so I was thinking if I cant fix it I might slap in a 350 any good sights with swap info?

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