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Only starts with either? why

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Offline Mikerpm4x4

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Only starts with either? why
« on: September 14, 2004, 10:04:13 AM »
My sister just bought a 94 tracker for a steal. However it only starts with starting fluid. It cranks just fine but no fire. Once its running you can drive it all day.

???Any ideas?

We swapped ECMs and fuel pressure regulator. No luck.

Mike
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Offline wildgoody

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Re: Only starts with either? why
« Reply #1 on: September 14, 2004, 10:26:44 AM »
Some trucks are like that,  have you
checked the compression ???  could be low

;)  :D  :)  ;D

Wild
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Offline ebewley

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Re: Only starts with either? why
« Reply #2 on: September 14, 2004, 10:32:11 AM »
Quote
My sister just bought a 94 tracker for a steal. However it only starts with starting fluid. It cranks just fine but no fire. Once its running you can drive it all day.

???Any ideas?

We swapped ECMs and fuel pressure regulator. No luck.

Mike


Make sure the fuel pump is running when the engine is cranking. There are two modes for turning on the fuel pump crank and run...

-Eric
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Offline Mikerpm4x4

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Re: Only starts with either? why
« Reply #3 on: September 14, 2004, 10:34:53 AM »
Quote
Some trucks are like that,  have you
checked the compression ???  could be low

;)  :D  :)  ;D

Wild



Naw, once its runnin it hauls ass. It just passed 100k. her other one with the 32s has almost passed 200k...it starts great. Go figure :P

Its definately not gettin fuel on startup. We have a donor vehicle to swap parts back and forth but which parts?

Mike

Mike
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Offline Mikerpm4x4

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Re: Only starts with either? why
« Reply #4 on: September 14, 2004, 10:36:29 AM »
Quote


Make sure the fuel pump is running when the engine is cranking. There are two modes for turning on the fuel pump crank and run...

-Eric

What the best way to check that? Pull the fuel line?
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Offline Mikerpm4x4

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Re: Only starts with either? why
« Reply #5 on: September 14, 2004, 10:42:44 AM »
Can I just pull the return line?Will that be accurate? Its a lot easier to get to.

Mike
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Offline 1bigtracker

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Re: Only starts with either? why
« Reply #6 on: September 14, 2004, 11:27:48 AM »
Quote

What the best way to check that? Pull the fuel line?

you should be able to hear it turn on when she turns the key on.

stu
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Offline ebewley

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Re: Only starts with either? why
« Reply #7 on: September 14, 2004, 11:43:34 AM »
Quote
Can I just pull the return line?Will that be accurate? Its a lot easier to get to.

Mike


Yeah, that would work for starters. You may be able to have someone stick there head down by the gas tank while it's cranking and listen for the pump to be running. If it's not, I'd get a long piece of wire and run a simple jumper wire from the positive of the battery to the plug in on top of the tank (that's pretty easy to get to) The pump will run non-stop then and if it's a fuel problem it'll fire up after that...

-Eric
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Offline ebewley

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Re: Only starts with either? why
« Reply #8 on: September 14, 2004, 11:46:16 AM »
Quote

you should be able to hear it turn on when she turns the key on.

stu


I think that depends on the year. On my '89 the pump didn't turn on until the start signal was received from the turning of the key. Then once the engine was started and had oil pressure, the ECM kept the fuel pump relay active.

I believe There's two inputs to the power relay for the fuel pump. If I had my manual on me, I could verify. ;)

-Eric
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Offline jerryp58

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Re: Only starts with either? why
« Reply #9 on: September 14, 2004, 01:14:15 PM »
Is this multi-port or throttle body FI?

The nice thing about my throttle body FI is that you can just look down the throttle body and see if the injector is firing.
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Offline idaholwb

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Re: Only starts with either? why
« Reply #10 on: September 14, 2004, 04:34:37 PM »
 Another thing you might want to try is check the fuel filter. It might be dirty enough to have low initial pressure.
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Offline Rhinoman

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Re: Only starts with either? why
« Reply #11 on: September 14, 2004, 09:07:12 PM »
Maybe a dumb question but how old is the fuel?
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Offline Mikerpm4x4

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Re: Only starts with either? why
« Reply #12 on: September 15, 2004, 09:47:03 AM »
Quote
Another thing you might want to try is check the fuel filter. It might be dirty enough to have low initial pressure.

Its new :(
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Offline Mikerpm4x4

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Re: Only starts with either? why
« Reply #13 on: September 15, 2004, 09:48:02 AM »
Quote
Maybe a dumb question but how old is the fuel?



it has fresh fuel.

Mike
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Offline Mikerpm4x4

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Re: Only starts with either? why
« Reply #14 on: September 15, 2004, 09:51:10 AM »
Quote
Is this multi-port or throttle body FI?

The nice thing about my throttle body FI is that you can just look down the throttle body and see if the injector is firing.


It is a throttle body and their is no spray. Im waiting for her to get home to check the fuel pump.

Mike
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