99 Tacoma 2.7 starts missing as fuel level declines

mooserov · 01-25-2013, 06:29 PM

My tacoma has a misfire/fuel starvation issue when the needle starts to get off of full. it died completely on me when it got to around half.
Previous owner said he had the fuel pump changed (bosch), but didn't give a reason why. Got the truck for $3800 with 180k on the odometer. 2wd.
I don't want to dump a ton of money into it, but here's what I've done so far.
New plugs,wires,pcv,air filter(tune up stuff) changed all fluids, cleaned maf, cleaned IACV, cleaned throttle plate, seafoam, New fuel pressure regulator (idle would speed up when I pinched the return line from the FPV).
Any suggestions?

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Xeo · 01-25-2013, 06:41 PM

Has the fuel filter even been changed?

mooserov · 01-25-2013, 07:27 PM

yep, forgot that. did it with the tune up

mooserov · 01-25-2013, 07:30 PM

I'm beginning to suspect that something isn't kosher in the fuel tank. I don't know exactly how everything is put together, but it makes sense that it may be a pickup tube issue, or something not seated, bad o-ring type issue.
The problem completely goes away when I fill up.

Xeo · 01-25-2013, 07:35 PM

No CEL?

mooserov · 01-25-2013, 07:47 PM

No CEL

youngtoyotatech · 01-26-2013, 05:06 AM

Quote:

Originally Posted by mooserov

I'm beginning to suspect that something isn't kosher in the fuel tank. I don't know exactly how everything is put together, but it makes sense that it may be a pickup tube issue, or something not seated, bad o-ring type issue.
The problem completely goes away when I fill up.

unless there is just something else not noticed yet, i agree. Probably a crack/hole in the pickup tube and once the fuel gets below the hole it leaks amd you loose pressure. If a fuel pump was just done maybe someome was rough on it when pulling it out/putting it in.

mooserov · 01-26-2013, 05:22 PM

how hard is it to drop the tank on these trucks?

01-25-2013, 06:41 PM	#2 (permalink)
Xeo Registered User Personal Sales Rating: (0) Join Date: Mar 2009 Location: Toronto/Ontario/Canada Posts: 140	Has the fuel filter even been changed? __________________ 1990 4Runner SR5 V6 2 Door 3VZE Powered 5 Speed Manual Swapped, 4:56 Gears Skyjacker Nitro 8000's 32x11.5 R15 Yokohoma Geolander A/Ts on 85 Landcruiser Rims. Mods: Power Antenna lol, SCB Cold Air Intake, AFM 2 Clilcks Leaner, Rear Diff breather, Front Sway Bar Removed, Aisin Manual Locking Hubs, OME Torsion Bars, Lifted with Cruiser coils and 1.5 inch, Bj spacers, 1985 Landcruiser Rims. Future Mods: 4.7L Tundra Swap >=D

01-25-2013, 07:35 PM	#5 (permalink)
Xeo Registered User Personal Sales Rating: (0) Join Date: Mar 2009 Location: Toronto/Ontario/Canada Posts: 140	No CEL? __________________ 1990 4Runner SR5 V6 2 Door 3VZE Powered 5 Speed Manual Swapped, 4:56 Gears Skyjacker Nitro 8000's 32x11.5 R15 Yokohoma Geolander A/Ts on 85 Landcruiser Rims. Mods: Power Antenna lol, SCB Cold Air Intake, AFM 2 Clilcks Leaner, Rear Diff breather, Front Sway Bar Removed, Aisin Manual Locking Hubs, OME Torsion Bars, Lifted with Cruiser coils and 1.5 inch, Bj spacers, 1985 Landcruiser Rims. Future Mods: 4.7L Tundra Swap >=D

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01-25-2013, 07:27 PM	#3 (permalink)
mooserov Registered User Personal Sales Rating: (0) [OP] Join Date: Dec 2012 Posts: 5	yep, forgot that. did it with the tune up

01-25-2013, 07:30 PM	#4 (permalink)
mooserov Registered User Personal Sales Rating: (0) [OP] Join Date: Dec 2012 Posts: 5	I'm beginning to suspect that something isn't kosher in the fuel tank. I don't know exactly how everything is put together, but it makes sense that it may be a pickup tube issue, or something not seated, bad o-ring type issue. The problem completely goes away when I fill up.

01-25-2013, 07:47 PM	#6 (permalink)
mooserov Registered User Personal Sales Rating: (0) [OP] Join Date: Dec 2012 Posts: 5	No CEL

01-26-2013, 05:22 PM	#8 (permalink)
mooserov Registered User Personal Sales Rating: (0) [OP] Join Date: Dec 2012 Posts: 5	how hard is it to drop the tank on these trucks?

01-26-2013, 05:22 PM
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