Long Start/Oil Pressure

[lx_2nv]

Morning Guys -

My 04 Excursion is having a long start issue. It literally takes 30-60 seconds of cranking to get it to start. Or, it'll start quickly then shut right off. Once running it is fine. However, once it is up to temps it will lose oil pressure at idle (stop lights etc). I know it is most likely the LPOP, but is there chance it's a bad sensor?

Thanks in advance - I didn't search this.

 

[Cutting-Edge Diesel]

Sounds like it lost the ball in the HPOP if it has the early pump. It will loose lpo at idle normaly and not want to start

 

[lx_2nv]

The HPOP was checked in August when it was studded. They said it looked good, but it did need a new IPR. I was hoping it was the ball as well though!

 

[Cutting-Edge Diesel]

If it was in my shop I would pull the oil filter and see if the LPO pump is pushing a good amount of oil. If it is then I would pull the HPOP.

 

[lx_2nv]

Thats the thing, he said it was pushing oil. Is it possible that the sensor is bad?

 

[Cutting-Edge Diesel]

If its pushing good oil it's the HPOP

 

[Bustedknuckles]

Is it worse when hot? Ive ran into a few that had leaks at the oil rail into injector orings that had real close to the same issue. Id check for HPO leaks under the valve covers first.

 

[Cutting-Edge Diesel]

You've had a HPO leak that caused it to loose LPO?

 

[Bustedknuckles]

You've had a HPO leak that caused it to loose LPO?

Missed that! No I havn't.

 

[lx_2nv]

If its pushing good oil it's the HPOP

Well I guess that's better than the LPOP - at least from a labor standpoint?

Is it worse when hot? Ive ran into a few that had leaks at the oil rail into injector orings that had real close to the same issue. Id check for HPO leaks under the valve covers first.

It'll lose pressure once it is hot. Only at idle. As soon as I tap the gas it is all good - and runs like a champ otherwise.

I'm looking to sell the truck and want to fix any issues.

 

[Cutting-Edge Diesel]

no LPOP is alot easier than HPOP but its still not bad.

 

[lx_2nv]

Thanks - and LPOP is easier on the wallet isnt it

 

[HOOV3R]

Thanks - and LPOP is easier on the wallet isnt it

Depends on if it tore up the front cover or not. Pull out the regulator for the lpop and make sure nothing is stuck in it.

 

[lx_2nv]

That sounds like my best outcome! LOL Thanks.

 

[Cutting-Edge Diesel]

If your getting good oil at the filter it's not your LPOP

 

[Fordguy100]

Mine did the same thing, it was the ball in the side of the HPOP. Tapped it for 1/4" npt pipe plug (iirc), all is well and it will never come out again. Just out time.

*Remember our oil pressure gauge is a idiot indicator, it registers normal at anything over (iirc) 8psi*

 

[lx_2nv]

Thanks for the heads up man!

 

[lx_2nv]

Haven't had much time to mess with the truck - but could old/dead batteries have an effect? They are only reading like 7 volts when I try to start.