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Which 4 codes? List it here.

Is 4-7 psi enough?

There will be SES or DTC with TurboMaster because you will be overboost at certain speed. That is normal. The DTC will Wastegate something. No, you will not see any movement of the wastegate till you get around 50 to 70 mph because that is when it is opened. Even that, the movement will...

Please keep us updated.

IME, in a BP station, the green pump is NOT diesel. So be careful.

That is good to know that both are 10 mm now. The good news is hopefully, you don't have to do it again for a long time.

There are 2 socket very close to each other used when replacing GPs a while back: 3/8" and 10 mm. IIRC, I took of the old one with 3/8" and install the new with 10 mm. The new one was Bosch and old was stock ACD. This was when Bosch was good, at least 13 years ago.

It is counterintuitive, because you think the wastegate started in an open position but it is NOT.

IIRC, set it at around 2.5" spring length. You will max at around 9 psi which is what the ECM likes. What happened is the spring strength will hold the wastegate shut until a max pressure is achieved then it is opened to relieve it.

Unfortunately, the airbox prevent me to get a good picture. I am too lazy to take off parts. Sorry. The picture on post #3, that bolt supposed to go into the bottom (only) hole in the original wastegate lever shown in post #1 on the right. I don't have any obstruction after the install at...

When I did mine on a 95, it was easy following instruction and fit just right without any issue. The most difficult part was threading the nuts to the wastegate. Set the spring at the length specified by the instruction and adjust it as you drive it. It was more than 15 years ago, and it is...

It is another revival !!!

IIRC, I have to loosen the DP clamp for wiggle room. I have a 3" Dia DP, though. Yes, I had to remove the inner fender.

If you are in the other forum, first answer will be check the grounds. As it is, you may still want to clean the other ground. Take the connectors off, hit them with brake cleaner and wire brush it as needed. If there is still plastic cover on the battery terminal, peel them off and wire...

Is it still cold up there in Montana? That will explain the need of the electrical plug-in heater.

The importance of grounds in this truck.

x2, remove it. It is not needed anymore.

Search in this forum: OS Filter Harness. That has caused a lot of owner issues in the past, if it is still there and faulty.

At DieselPlace forum, there is a member name Glagulator. He is the electrical guru on this truck. There may be some wiring diagram in their FAQ also, not sure if that ever makes it into the Technical Library in this forum.

It depends whether the snow is plowed or not? Most places that has regular snow are plowed so you should have traction. Now, if you are in TX and it has snow, then you should be worried. The city here don't have snow plow. LOL!!!