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almost but not quite

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Old 04-20-2017, 10:39 AM   #1
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almost but not quite

...driving to work at 1:45 am and just pull onto the highway when the engine dies! I coast to the shoulder. Like an idiot I didn't have a 'break-down kit' (emergency stuff in case of a breakdown). The truck was sitting a little too close to the highway so I crank the wheels to the right and give a push. My truck then rolls down an embankment into some brush and small scrub trees (remember it's early morning and I'm w/o a flash light). Well, I'll let AAA resolve that problem when I get off of work.

The truck turns over easily but it just won't run but for a few seconds. I figured I had a faulty fuel pump and/or filter. When I finally got around to it, I lifted the bed and pulled the pump. I hooked the pump to the battery and got nothing.Picked up a new pump, replaced the bed and fired her up. Runs for about 5 seconds. It would take me
forever driving to work in 5 second intervals so I replaced the filter. Stll NO change:-( I've got 13+ volts at the battery, the EFI relay meets specs and I'll check the the circuit opening relay when I find it:-/ I could use some guidance/ recommendations so I can get this truck ('99 Taco 4x4 w/5vzfe &
auto tranny) back on the road. Thanks
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Old 04-21-2017, 12:07 AM   #2
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Red face

Pray tell just what are you working on here ??

Since it is in this section I am guessing A OBII vehicle??

Has your MIL turned on ?? Have you pulled any codes just in case ??

Most times if it starts and shuts off the ECM is not seeing a signal and shuts off fuel to a engine it thinks is not running

Some that come to mind are the Crank Cam sensors and Igniter circuits
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Old 04-21-2017, 06:38 PM   #3
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It says at the end of the post. '99 V6 Taco.

Does it stall abruptly or does it stutter at all before it quits?

Does it restart fine, but only run briefly before stalling again?
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Old 04-22-2017, 04:37 AM   #4
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Hey Pineapple

Can you briefly let us know if the starter cranks the engine? Also do you hear the fuel pump humming when you put the key in on ON?

So, from what I understand, sounds like you may have a broken ground/wire on one of the solenoids. I had a similar incident on a 4runner, also on the highway - the 4Runner engine stops running (no warning sign, just turns off) suddenly when cruising at regular speeds, then it came back on briefly...then again turned off. The starter cranks the engine fine.

Try gently pulling on the wire harnesses that are going to/away from the solenoids. It may allow the engine to run when you start it, but it wont actually fix the issue and most likely will happen again.
If you are ok working with wires, you can manually add a ground wire to the the solenoids' ground connection to see if it will work.
But do trace the problem with a volt meter for continuity.

Let us know.
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