So yeah..I throw the 0234 overboost about twice a week now..ALWAYS on the same hill, and ALWAYS when I have the cruise set, never over 10 psi when it throws the code, granted I usually wromp it coming out of the light before said hill, so now I just keep the quad in the glovebox and erase the code before I shut the truck down..the light dissapears while the truck is still idling :), just kind of annoying.

That would get annoying -- I'd give Quad a call.


Mine did it twice during the winter (once w/ 110 program, once w/ the 135 program -- the 215 never throws it), but I have yet to do it again.


The second time I was too lazy to clear the code and it cleared itself after a few days -- not sure if that is a PCM feature or a bug, but it happened...

My Quad boxes did the same thing as did the BullyDog 150 box on my '01. the original Quad 135 box would be ok in the 110 mode but not the135 mode. With his latest tunes in February it would do if on the 890 - 100 - 135 settings.

It is in fact the latest settings, version 1.20

It is in fact the latest settings, version 1.20


What are you running for a airbox and filter ??


I'd check my mass air to ensure it was clean ,then call ...





Mac

My truck does this also, usually when running stock, same on ramp at about the same throttle pedal each time. Mass airflow was cleaned not too long ago. Dang overboost codes.

Actually when it cuts out like that it can be downright dangerous. Cruising down the highway at 70+ and then no power for 20 sec. or so, can cause big trucks to play bumper tag with you, a game which I don't care to play.


I was fortunate to have Quad refund my $$$ and then decided to get the Hot Juice /Attitude. In hindsight I wish I would have gone this way to start, but you know how it goes.


All I'm going to say is that I'm very, very happy with the HJ/***. combo. In fact, it's far more than I ever expected. Edge does not do a very good job of marketing IMHO. Some of the stuff you can do with it is kept very silent. If I would have know all the stuff you can do with the Attitude, and with the neat ATS "factory look" mount, it's a no-brainer.


All is well in paradise again, but . . . someone please find a tranny builder for me in the Cleveland, Pittsburgh, Erie, Buffalo area please. I can feel the need coming on quickly.

Mine has started setting an overboost code, and a P0540 code. It never seems to turn on the SES under conditions when my TST shows max boost, but on the next cold start. It did it at lower altitude, where I can see 26 lbs boost, and it did it at 6000', where I can only see 20 lbs. I have an Amsoil filter, and wonder if the real problem is the MAF having gotten some oil. It does this without any added torque or HP.

Trader Jack: The overboost code does not cause a loss of power (or any other noticeable issue other than the SES light) on the '02-'04's. Perhaps that is one of the changes GM made for the later year trucks.


Since the issue seems to occur only under a very precise, consistent set of circumstances it would seem to be a programming issue...

I have run the Quad Stealth 135 set at the 110 or 135 for most of the past 25,000-30,000 miles and I have never set a code or had loss of power (Other then limp with 135hp setting, on the back side of 90 and my foot on its way through the floor board)


On the other hand; the Predator would set code left and right. But never the Stealth, Guess I am a lucky one.http://www.dieselplace.com/forum/smileys/Big Smile.gif

hdmax: Are you running v1.20? I never got an overboost code until I upgraded, but believe -- it is worth it. I would physically remove the SES light from my dash before I would have Quad return it back to the old version.


Overboost code or not, v1.20 flat out rips down. On a stick the reduction in turbo lag is particularly valuable. I wish the 215 tune pulled as hard down low as the v1.20 135 tune does -- that would be heaven...

The Quad overboost and stumbling was 01 specific ... Has it breached into later years ?? I am witness to a huge stumble shut down then have power return with a MIL ,on occasions ,not every time ... Cause of MIL ?? Overboost code was stored ...


Mac

How can we fix this problem, i have customers with the same issues, and the only way I can fix there problems is by selling them the edge!!!

hdmax: Are you running v1.20? I never got an overboost code until I upgraded, but believe -- it is worth it. I would physically remove the SES light from my dash before I would have Quad return it back to the old version.





Michigana_Joe; I have the original version, I am awaiting a couple new features that sound very good. But my e-mails go un-answered.


I do look forward to the new power down low. The last time I talked with Quad (The days before he was banished from this fine place) he informed me that I wou;ld be much better out to wait a couple or three months. He stated that the wait would be well worth it.http://www.dieselplace.com/forum/smileys/Cry.gif

Trader Jack, call Joe at Suncoast to get a recommended installer. I was in the same boat and he hooked me up with the ONLY installer to his liking in the entire Northwest. Now I am working on the neccessary funds.

WHAT SYMPTOM ARE YOU 01 OWNERS SEEING WHEN YOU GET THE OVER BOOST CODE? MINE FALLS ON ITS FACE AND ACTS AS IF THE RPM LIMITER IS AT 2000 RMP'S

The overboost does take decisive action and cuts fuel. I have seen this on the new 215 tune.





Aside from Quad fixing the program, there are 2 ways I know of to fix this. One is adding a module lik ethe Juice or VA that limits the signal. The other is installing a boost signal limiting device. I've done the limiting device on the dyno with success, but have not tested on the road.

The overboost does take decisive action and cuts fuel. I have seen this on the new 215 tune.





Aside from Quad fixing the program, there are 2 ways I know of to fix this. One is adding a module lik ethe Juice or VA that limits the signal. The other is installing a boost signal limiting device. I've done the limiting device on the dyno with success, but have not tested on the road.





I added the Juice (Additude and non Additude),same effect newer tunes are considerably worse .... I think Pnut is in the same boat ...


If your on and off the throttle continually it isn't as bad ... That makes for a very undesirable ride tho ...I know it isn't my truck as it has been running absolutely perfect since my Quad is on a sabatical ...


Track or dyno box for me...





Mac





Edited by: Mackin

WHAT SYMPTOM ARE YOU 01 OWNERS SEEING WHEN YOU GET THE OVER BOOST CODE? MINE FALLS ON ITS FACE AND ACTS AS IF THE RPM LIMITER IS AT 2000 RMP'S


That there is your typical p0234 code, better known as overboost. Won't rev past 2000. Pull over and turn the truck off. Wait 10secs and turn it on, back to normal except for the light. Light will go off when 3 consecutive starts have been achieved with no overboost present, or use a tuner to clear code. Don't ask how i know this http://www.dieselplace.com/forum/smileys/Confused.gif

How can we fix this problem, i have customers with the same issues, and the only way I can fix there problems is by selling them the edge!!!

gosh are we actually agreeing..........glad we are........

WHAT SYMPTOM ARE YOU 01 OWNERS SEEING WHEN YOU GET THE OVER BOOST CODE? MINE FALLS ON ITS FACE AND ACTS AS IF THE RPM LIMITER IS AT 2000 RMP'S


That there is your typical p0234 code, better known as overboost. Won't rev past 2000. Pull over and turn the truck off. Wait 10secs and turn it on, back to normal except for the light. Light will go off when 3 consecutive starts have been achieved with no overboost present, or use a tuner to clear code. Don't ask how i know this http://www.dieselplace.com/forum/smileys/Confused.gif





BUT ON MY TRUCK I DONT HAVE TO PULL OVER AND TURN IT OFF. IT PROBABLY WILL LAST FOR ABOUT A MINUTE AND IT RESUMES BACK TO WHERE IT WAS BEFORE IT SET THE CODE. I NEVER HAVE TO TURN IT OFF TO RESET IT. MY DADS TRUCK DOES THE SAME THING BUT HE HAS TO STOP AND TURN IT OFF BEFORE IT WILL ACT RIGHT. HIS IS AN 01 AS WELL.http://www.dieselplace.com/forum/smileys/Confused.gifhttp://www.dieselplace.com/forum/smileys/Confused.gif DONT YOU JUST LOVE ELECTRONICS SOMETIMEShttp://www.dieselplace.com/forum/smileys/Angry.gif

Some ....http://dieselplace.com/forum/smileys/Embarrased.gif


I don't have to pull over either .... Does the xcelerator do the same ??





Mac Edited by: Mackin

In the last 15,000 miles, I have had the 0234 code twice. Both times I wouldn't have even noticed if the light didn't come on. No loss of power or any other symptoms short of the code itself. Also both times, I was driving out of the ordinary. I think I know what causes it to come on. At least both times, I was doing the same thing to cause it.


Perhaps how the ECM reacts to a 0234 code has changed each model year. I used to think the power loss was 01 only, but I think some in this thread have newer years with the same problem.

THE XCELERATOR DOES THE SAME AS THE QUAD/POWERPUP MAC. DOESNT SEEM TO BE AS BAD WITH THE JUICE, BUT FROM TIME TO TIME EVEN WHEN IM STOCK IT WILL DO IT. IT JUST SEEM THAT IT HAS A MIND OF ITS OWN. IT WILL GO FOR MONTHS WITHOUT DOING IT THEN DO IT SEVERAL TIMES A DAY, BUT ALWAYS WHEN ITS UNDER LOAD OR ACCELERATION. AND AT TIMES IT DOESNT SET A CODE WHEN IT THROUGHS THIS FIThttp://www.dieselplace.com/forum/smileys/Confused.gif.

That isn't surprising .... http://www.dieselplace.com/forum/smileys/Wink.gif





The Newer versions will do it under acceleration as I've seen it too ... I have removed the Tuner and it did repeat on my truck ....Has to have something to do with some type of flash memory ,but I could be wrong ...


One thing is certain once removed and everything returns "normal" I run the Comp OJ without out a Hiccup ....


Makes Power but drivability for us 01 owners is less then desirable for certain and from what I'm hearing seems to be stretching into the other LB7 years ....





Mac

The power loss is *only* on 2001 trucks -- right?

The power loss is there on all, but the nasty stuff that Mac describes is 2001 only near as I can tell.





Makes for a pretty interesting dyno chart! I pulled in a truck pull (and won) with the 215 last year and won by 7' after COASTING down from an overboost code...

Must be something different with the 2004's then -- I have thrown the overboost code twice and never would have known if it wasn't for the SES light. Sounds like Amric has had the same experience with his '04.


I know there are differences with the '04 LB7 PCM, but I didn't think it was anything that substantial. I guess not defueling in response to an overboost code is may be one of the differences...

This sure seems random. I threw the code yesterday after accelerating to merge on the highway. I wasn't on it hard, got up to speed (80 MPH), set the cruise, and there it was (SES light). Since it was my first time seeing this, I took it easy until I could pull over and check everything. I found nothing amiss and I had no loss of power. I cleared the code and it hasn't come back.

How can we fix this problem, i have customers with the same issues, and the only way I can fix there problems is by selling them the edge!!!http://www.dieselplace.com/forum/smileys/HiHi.gif http://www.dieselplace.com/forum/smileys/HiHi.gif or TTS

One needs to remember that the overboost code is NOT from going past max boost level! The ECM checks desired boost, RPM and airflow to see if it's out of range. So that is why you are setting it. It's a Quad problem that he need to fix in the tuning. Believe me it can be fixed. http://www.dieselplace.com/forum/smileys/Approve.gif

It may be fixed now. I have an update from him (v1.23? can't remember right now) that hasn't thrown a code in a while. It'll be a couple of weeks before I can give it the acid test on my monthly road trip.