Engine/Transmission (1998.5 - 2002) Boost #'s

[C4gan]

I have been a member for over a year now and i mostly get valuable info from reading everyones questions and answers, however, since i have installed gauges i have some questions.

I bought my truck over a year ago and from what i was told it was completly stock. Since the gauge install i have noticed that at wot my boost is at 28lbs. From what i see i should be at 22 lbs for a stock truck. How is this possible? And Fuel pressure at wot is between 7 - 8 lbs and 13-14 at an idle. Should i be concerned about this? I have removed the silencer ring and installed a k&n air filter. other than that it is a 2001 2500, automatic with no mods. Any thoughts? What should i look for? Thanks!

 

[RCCola]

Buddy's 01 24v 6spd only pulls 22lbs or so then the computer cuts it back to 20

i 'm interesed to here others reponce

 

[Dave Ratcliffe]

Look for a hook type device on your turbo wastegate to see if its forcing it to stay open. I've heard of some people using a 16 penny nail to keep it open on the HY turbos. Also, check for a boost fooler device attached to your map sensor (back of engine on driver's side). My BD boost fooler is a very compact inline device and is hard to see.



Try cycling your key three times quickly and you'll see a code self-check performed in the odometer screen. You should have an over-boost code if you don't have a boost fooler of some sort on the map sensor.



At 28 lbs, I would think it would possibly have RV (275) injectors or something similar.

 

[Partyat33]

I would be HIGHLY suprised if you can get 28lbs of boost on a stock truck.

 

[C4gan]

Ok, so i looked for some device to hold the waste gate open and there is nothing. Also looked for a boost fooler and cannot find anything also. Checked the self check and have the following codes p 0500, p 1693 and p0234. I am even more confused now with the boost issue... ... ...

 

[Partyat33]

Not sure what to tell you. Does anyone live near you ? I don't see your location in your signature.



Dennis

 

[johncameron]

P0234..... over boost code, HMMMMMM

 

[Tcolesanti]

Maybe the wastegate is sticky??? It may be staying open longer, causing more boost. If there is no turnbuckle, then its got to be a problem with the wastegate/ OR whoever owned the truck put injectors in it and is causing it to build more boost before the wastgate can catch it.

 

[Bob Wagner]

the wastegate tube could be blinded off too. Edge supplied a slug to fit into the wastegate or a 22ga shell fits too.

 

[Graphic man]

your waste gate is stuck shut!!! pull off the turbo and see if it is seized,

i had the same problem on my 01 and the same boost

 

[andrewkoperdak]

I believe that the most probable suggestion has already been offered, a stuck waste gate.

I couldn't help but wonder.

Might a boost fooler restrictor elbow still be installed on the intake. That would allow you to get more boost BEFORE the waste gate could activate. I would take out the brass elbow with the hose that runs to the waste gate on the intake beneath the turbo. Look to see if it has a pin hole or a 1/8 size hole. If it has a pin hole it should have been removed with any boost fooler that was installed. The larger hole is stock.

Just my two cents.

 

[C4gan]

What i found out is that there is an adjustable rod end attached to the wastegate. Since i posted this question i purchased a EZ box (needed a boost fooler anyways) and adjusted it boost with the box installed to 32lbs. What a difference! Sorry to not clear up with my findings sooner.

Everyone have a good holiday!

Chris