I'm back... and the HPOP is still giving me fits

[kleen]

It's been over a year sense I visted this site. You see I bought a second car (honda gas) to drive to work so my Van is used for vacations and off roading towing ect. I have been very good a parking on level ground or nose down. But all good things must end and when coming back from the desert I was having problems with my credit card at a gas station and sure enough I was there long enough and just enough slope (nose high) to drain the HPOP of the van again. I have been so good the the last year. Anyway I can still get to the HPOP and fill it up and be back on the road in less than 20 minutes.

I was hoping someone has finally discovered the cause and solution to this issue.

[Clark2]

I have the same problems and its kind of irritating. If I start the van with high rpms things are usually fine, but sometimes it ends up a little dicey. If its actually draining I've heard that all you need to do is replace the check valve, but if you can let is sit for periods of time and still have it start it doesn't sound like its actually draining. I've narrowed it down to fact that the hpop isn't getting filled. I've had the lpop checked and they said it was still good, but maybe a little wear is causing drama. It seems to be a common problem without a definite fix.

[MADVAN]

Do you think its strange that both of you own 00's and have the same problem.

Overfill the crankcase with 2qts of oil and see if problem goes away.

PM recieved and sent.

Bill

[Clark2]

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Overfill the crankcase with 2qts of oil and see if problem goes away.</div></div>
What do you think might be wrong (maybe a leak in the pickup)?

[bork]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Clark2</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Overfill the crankcase with 2qts of oil and see if problem goes away.</div></div>
What do you think might be wrong (maybe a leak in the pickup)? </div></div>

I dont know much , but just trying to help. In other words, if you could shut off van in level or nose down, before nose high angle, & coast to a nose high angle, (where problem usually occures) & park . Then try restarting at the moment when it usually doesnt start.(cant remember if it is overnight or minutes) This would tell you if it is a pick-up problem. BUT if it was, one would think the engine would not run at all on a steep nose up angle, idleing in park. Have you tried idling a long time in "park" at the famous "no restart" spot? Have you posted in 7.3 engine/drivetrain forum. Do some f-series experiance same.
ON edit: I see the lapse was due to credit card delay. (is this approx 5 minutes + fill tank minutes?) so go back to same place & angle & see if engine stalls when idling at that spot for the approx time you spent there with credit card & fillup. & plus a few minutes.( inform employee before doing & ask when an appropriate time would be, to tie up space)

[FULLAUTO]

hope this is not a stupid suggestion but maybe try a new HPOP and one from a later year i know SIX upgraded his on his 98 to a later version not sure why though?
wade

[sixiron]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: FULLAUTO</div><div class="ubbcode-body">hope this is not a stupid suggestion but maybe try a new HPOP and one from a later year i know SIX upgraded his on his 98 to a later version not sure why though?
wade </div></div>

early 99 engines had a HPOP with less capacity...the 2000 and above should be the newer style with 30% more capacity...

my .02 is to check some older posts...IIRC there was some issues with drainback valve in the HPOP...bad seal would let oil drain out of the HPOP after shutdown...hot running was OK, after shutdown the oil would drain and there was a no start or a hard start until the pump got enough oil to the injectors...

merry christmas everybody
bill

[Clark2]

Hi Bill - for me this was not the case. Its starts off with enough oil in the hpop then dies when it runs out. It points to the lpop but supposedly its in good shape (according to the head tech at the dealers fleet service center)

[MADVAN]

Did you overfill and test to see?
You can also test by jacking rear of truck up before starting.
I would check this first. "Get it on a good angle"
Iam not saying the LPOP is bad. But possible draining overnight. If it were bad. One of the first signs is turbo failures.

Bill

[kleen]

OK this is going to be a stupid question...I thought it was very bad to overfill the crankcase by even 1 quart musch less 2 quarts? If I do this I don't want to ruin the engine this has been hammered in my head sense I was 16 so help me with this one. If it's OK I will do it and if all is well I mean the engine starts and there isn't a problem then what? Plus how long can I run with 2 quarts of extra oil? OK more than 1 stupid question. [img]/forums/images/%%GRAEMLIN_URL%%/smile.gif[/img]

[Clark2]

Here's a stupid question, but have you changed your air filter recently. The reason is that my poor start had been manageable up until the fires. I finally got around to changing the filter and its working better. I'm thinking any small thing pushes it over the edge.

[MADVAN]

Air filter?
If it fails the over fill/ rear lift test.
Install a pressure gauge by the oil filter location and see how long it takes to build pressure after initial start.
I would replace the LPOP oil relief valve. Or just replace the cooler. My bet is the valve hangs open. It would not be the quick fill valve due to the HPOP is full before you start it up. If the quick fill valve was bad the HPOP would be empty before you start it.

I believe it could be the relief valve is draining the oil cooler with the nose up condition. At startup its filling the cooler thus the loss to the HPOP. Or the front cover is bad (worn).

http://rides.webshots.com/album/93028687WtvRkH

Bill

[Clark2]

I had the oil cooler assembly replaced on mine and it didn't fix it. In regards to the lpop the dealer was surprised that everything on the lpop looked fine fwiw. I'm not saying the air filter fixed the problem, but rather lessened the amount I'm experiencing the problem.

[MADVAN]

Clark

I would believe you might have a pickup problem.
I would do the overfill/raise rear test.
Install a gauge first.
The cover can wear/score behined the LPOP.

Bill