Diagnosing rebuilt engine - burning oil, lean, and low power up inclines
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Pro Wrench
Joined: May 2016
Posts: 1,617
Likes: 184
From: Lake Tahoe
The christmas tree thingy was super clean and intact. I replaced it with the Fram PCV valve about 50 miles ago. When I cleaned the valve covers I removed the plate inside of them and cleaned those thoroughly as well, so I doubt I have a PCV issue. Haven't checked driver side tube yet.
Lower intake bolts were also pretty loose, about 20 foot pounds. I'm super paranoid now that the crank bearing caps and connecting rods are loose. I might have to drop the pan...
I used ARP Fastener lubricant for everything except the upper intake. I'm thinking maybe that wasn't a good idea
Lower intake bolts were also pretty loose, about 20 foot pounds. I'm super paranoid now that the crank bearing caps and connecting rods are loose. I might have to drop the pan...
I used ARP Fastener lubricant for everything except the upper intake. I'm thinking maybe that wasn't a good idea
Last edited by Jeff Blake; May 4, 2018 at 08:35 PM.
Thread Starter
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Pro Wrench
Joined: May 2016
Posts: 1,617
Likes: 184
From: Lake Tahoe
Done the following:
- spark plugs (champion OE spec)
- fuel injectors and o-rings
- swapped britpart coil for a Bosch
- cleaned throttle body
Vacuum pressure at idle is still 13. Can anyone else post up their vacuum pressure?
Did a quick drive on a decent hill, possibly a little snappier, but I'm pretty sure if I go back on I-8 it'll be the same
Long term trims are around +5.5 on both banks. Kind of weird because every time I look at the short term trims, I am -3 to +3. What are yours?
Next step I'm going to be finish the transfer case rebuild and see what that does. Might be chasing a ghost with the engine. I think the increased gear ratio will just perfectly do the job to help me pull 4th gear on hills.
- spark plugs (champion OE spec)
- fuel injectors and o-rings
- swapped britpart coil for a Bosch
- cleaned throttle body
Vacuum pressure at idle is still 13. Can anyone else post up their vacuum pressure?
Did a quick drive on a decent hill, possibly a little snappier, but I'm pretty sure if I go back on I-8 it'll be the same
Long term trims are around +5.5 on both banks. Kind of weird because every time I look at the short term trims, I am -3 to +3. What are yours?
Next step I'm going to be finish the transfer case rebuild and see what that does. Might be chasing a ghost with the engine. I think the increased gear ratio will just perfectly do the job to help me pull 4th gear on hills.
Recovery Vehicle
Joined: Jun 2017
Posts: 1,238
Likes: 240
From: Alabama + Vegas + Texas
My long term fuel trims are worse than yours, but my motor is doing fantastic!
They are in the +7.1 to +7.3 range.
Before I solved my O2 ground problem and did my motor rebuild, they were pegged at +20.
They are in the +7.1 to +7.3 range.
Before I solved my O2 ground problem and did my motor rebuild, they were pegged at +20.
Baja
Joined: Aug 2013
Posts: 6,888
Likes: 787
From: Huntington Beach CA
Done the following:
- spark plugs (champion OE spec)
- fuel injectors and o-rings
- swapped britpart coil for a Bosch
- cleaned throttle body
Vacuum pressure at idle is still 13. Can anyone else post up their vacuum pressure?
Did a quick drive on a decent hill, possibly a little snappier, but I'm pretty sure if I go back on I-8 it'll be the same
Long term trims are around +5.5 on both banks. Kind of weird because every time I look at the short term trims, I am -3 to +3. What are yours?
Next step I'm going to be finish the transfer case rebuild and see what that does. Might be chasing a ghost with the engine. I think the increased gear ratio will just perfectly do the job to help me pull 4th gear on hills.
- spark plugs (champion OE spec)
- fuel injectors and o-rings
- swapped britpart coil for a Bosch
- cleaned throttle body
Vacuum pressure at idle is still 13. Can anyone else post up their vacuum pressure?
Did a quick drive on a decent hill, possibly a little snappier, but I'm pretty sure if I go back on I-8 it'll be the same
Long term trims are around +5.5 on both banks. Kind of weird because every time I look at the short term trims, I am -3 to +3. What are yours?
Next step I'm going to be finish the transfer case rebuild and see what that does. Might be chasing a ghost with the engine. I think the increased gear ratio will just perfectly do the job to help me pull 4th gear on hills.
I have this number as the highest vacuum pressure I had on my D2.
25 in Hg vac/64 cm Hg vac
i can test at idle tomorrow
Thread Starter
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Pro Wrench
Joined: May 2016
Posts: 1,617
Likes: 184
From: Lake Tahoe
Definitely interested in idle vacuum readings.
I've been using the SAI and the brake booster ports for convenience, but I think I should test it again on the PCV port. The manifold might be pulling air from the valve cover, lowering the readings. Or is vacuum supposed to be tested with the PCV system intact?