won't start when warm
Thread Starter
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Senior User
Joined: Apr 2009
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So I replaced the HPO seal in injector #1 which was clearly bad.
I reinstalled it and did an air test. There was still a sound coming from the area of #1 injector.
I pulled #1 and #2 injector. Inspected them and they both look good.
Is there something else I should check? Should I try putting it back together and see if it works?
Is there a port in the HPO rail that I can do an airtest on so i don't have to do the test from the top of the HPOP?
I reinstalled it and did an air test. There was still a sound coming from the area of #1 injector.
I pulled #1 and #2 injector. Inspected them and they both look good.
Is there something else I should check? Should I try putting it back together and see if it works?
Is there a port in the HPO rail that I can do an airtest on so i don't have to do the test from the top of the HPOP?
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
was the valve covers off when you put air to it and checked it again
If it were me and I had it that far apart I would be putting in new stand pipes dummey plugs and STC fitting and be done with it
If it were me and I had it that far apart I would be putting in new stand pipes dummey plugs and STC fitting and be done with it
Thread Starter
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Senior User
Joined: Apr 2009
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My oil rail is straight, and intake manifold is an O
What are stand pipes and dummy plugs? Can they cause HPO leaks?
What are stand pipes and dummy plugs? Can they cause HPO leaks?
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Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
oh ypou dont even have an STC fitting
your HPO system is way diff then
I thought this was an 05+ style HPOS
man your HPO system is the style that usually the pump fails but not much eles
so you just feel the air around the #1 injector where the oil rail goes into the top of the injector
could be a bad injector just letting the oil go thru it
your HPO system is way diff then
I thought this was an 05+ style HPOS
man your HPO system is the style that usually the pump fails but not much eles
so you just feel the air around the #1 injector where the oil rail goes into the top of the injector
could be a bad injector just letting the oil go thru it
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
oh ypou dont even have an STC fitting
your HPO system is way diff then
I thought this was an 05+ style HPOS
man your HPO system is the style that usually the pump fails but not much eles
so you just feel the air around the #1 injector where the oil rail goes into the top of the injector
could be a bad injector just letting the oil go thru it
your HPO system is way diff then
I thought this was an 05+ style HPOS
man your HPO system is the style that usually the pump fails but not much eles
so you just feel the air around the #1 injector where the oil rail goes into the top of the injector
could be a bad injector just letting the oil go thru it
Steve--Your standpipes are different and you don't have dummy plugs in the HPO rails. That upgrade doesn't apply to your truck.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
I thought he fixed it the injector o-ring an dstill had an problem
Thread Starter
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Senior User
Joined: Apr 2009
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I did fix the d-ring and I am still hearing air. Pulled all the injectors and the HPO seal that was bad on the first one looks ok on the rest.
Just borrowed a stethescope from my neighbor. Thank God I live next to someone addicted to buying tools.
I'll see if I can locate the problem any closer.
Just borrowed a stethescope from my neighbor. Thank God I live next to someone addicted to buying tools.
I'll see if I can locate the problem any closer.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
You mentioneed that you still hear air from around injector #1 after replacing the oring
the top oring has been replaced on that injector so we know that one is good
but I wonder if the Injector itself is bad on the oil side of the injector could be that the spool valve is stuck open just letting Air/oil run thru it
the top oring has been replaced on that injector so we know that one is good
but I wonder if the Injector itself is bad on the oil side of the injector could be that the spool valve is stuck open just letting Air/oil run thru it