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Hard start when hot/sitting

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Hey folks,

I've got a hard start issue that started when I pulled off the interstate in 115 degree heat.  Almost always has a hard start if the engine is warmed up and sits a couple minutes now.  Sometimes it will hard start if sitting overnight.  The first time was 1k miles after a fuel filter change on a road trip from Vegas to southern Idaho, but I did the standard bump the pump and it ran great after that. I can't see any fuel leaking anywhere.  I've always seen a little drip off the tank if I really top it off, but that's been the case since I bought it.

 

I just ordered a DDRP from FASS, but haven't installed it.  I'm driving a loop from Vegas>Oregon>Idaho.Vegas in a month with a small horse trailer and a couple pack llamas in it.  What's a good way to test the fuel system before hand?  Once I had a pump I could run off a battery and traced an air leak to a cracked pickup in the tank with a clear hose that way, but alas no more pump.

 

I know this truck has at least one stock style lift pumps and a upgraded VP44.  it normally runs 13psi at idle and 9 PSI cruising, can go down to 7 WOT, hence the DDRP.

 

Any chance I could be having an o-ring problem with the fuel filter that took a thousand miles to show up?  I snugged it down with a one and a quarter inch socket.

 

Thanks folks,

Edited by beautifulisblue

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  • beautifulisblue
    beautifulisblue

    Yep starting well, can't replicate the problem.     Need to get it nice and hot tonight and double check.

  • NIsaacs
    NIsaacs

    Soon after I bought my used '01 in '03 with 34k miles on it, I had a hard hot start. I was towing a pickup on a real hot day and let my fuel tank drop down till the low light came on, I wanted to fuel

  • Rotax3006
    Rotax3006

    The good news is that those are not the VP death codes, of course that doesn't mean much.  It does not sound like a fuel leak to me.  It would have to be a major leak for a hard start immediately afte

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On 7/22/2020 at 5:11 PM, beautifulisblue said:

The engine would turn over and crank and didn't even seem that slow when it was hot and eventually start.  That's why I originally assumed it was VP44.  It wasn't until I put on a new starter that I realized how much zippier it was than the old wore out one.

i think there is a minimum rpm for detonation to occur to start, temp relative too. so your symptoms are def the starter as you found. install that lift pump asap but be aware the vp still has a lot of miles on it from the oem tincan lift pump and may still die soon.

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