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P1260 and P1000 codes on 98?

Discussion in 'Stock 1995 - 2001 Explorers' started by unioncreek, September 20, 2019.

^^Searches ExplorerForum.com^^





  1. unioncreek

    unioncreek New Member

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    I bought a 98 Explorer with a 4.0 SOHC engine on a surplus sale. I was owned by a county close to me. They said it didn't run and had been diagnosed with a bad fuel pump. When I picked it up I put a battery in it and did not hear the fuel pump come on. On the way home I stopped at O'Reillys to use their scanner, the only codes I got were the P1260 and P1000. I've been reading up on the P1260 code. Both of my keys are factory ones and not aftermarket.

    Looking for advise on what I should look at first and test to get it running. Is there any other indicators that would tell me that the P1260 is the definite problem?

    Thanks,
    Bob
     
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  3. Hacra

    Hacra Elite Explorer

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    How's the battery voltage?

    Edit: There's apparently rare issue where low battery voltage can cause the PCM\PATS to wipe the assigned keys.
     
    Last edited: September 21, 2019
  4. unioncreek

    unioncreek New Member

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    I
    It didn't have a battery in it when i bought it. I have one that's good to put in it. If the keys were wiped is there a way to correct that?

    Bob
     
  5. unioncreek

    unioncreek New Member

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    I was just out and look at it again. The previous owner said the fuel pump was diagnosed as being bad, but didn't get any code associated with that. I put a battery in it and as soon as I turned the key I could hear the fuel pump come on. I tried to start it and it wanted to start. So, I sprayed some starting fluid in the intake and it fired right up and ran for a about 10 seconds. I didn't hear the pump start up again and I tried it about 10 times. Is the small green cap on the drivers side beside the radiator the port to test fuel pump pressure. I tried putting my gauge on it but the threads are wrong. I'm going to order a pump and hopefully that's all thats wrong with it.

    Bob
     
  6. 1998Exp

    1998Exp Well-Known Member

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    That's the test port for the evaporative management system. Look for a Schrader valve on the fuel rail.
     
  7. fast_dave

    fast_dave Active Member

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    @unioncreek

    Besides the two codes - P1260 and P1000 - regarding the seller's diagnosis of a bad fuel pump - start simple; when was the last time the fuel filter was changed?

    The 1/2 a beer can sized fuel filter is - in effect - the Explorer's Achilles Heal.

    Because it's so big. if frequently never gets changed...

    $8.63 for a Motorcraft Fuel Filter @ Rock Auto

    You'll have to change it anyway if you replace the fuel pump - so why not start out with a 1/2 hour job for less than $10?

    Link: 1998 FORD EXPLORER 5.0L V8 Fuel Filter | RockAuto
     
  8. unioncreek

    unioncreek New Member

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    I don't know when/or if the filters been changed, I recently bought it. I will change it when Ichange the pump.

    Bob
     
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  9. imp

    imp Well-Known Member

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    @unioncreek

    Keep in mind that a whole host of fuel problems can crop up, none of which is the computer, PCM, able to detect, including a bad pump. imp
     

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