WHAT IS IT??? :confused:

0234 overboost. I get it every time I tow. Comes from the downloader.

Need a module with boostcap to fool it or a different downloader.

Im Stacking It With Juice, Isnt That Supposed To Fool The Boost???

Yeah I saw that in your sig. I thought that was suppose to be the cure?

I only have the downloader, and a inline boost fooler at the sensor. It doese not always work either.

I remeber reading Steve Cole say that the problem is not really to much boost, but rather a problem with the way some tuners are programmed? He never really elaborated.

PEANUTGRWR, How do you like the hot xcelerator? I have the regular one right now, and just sent it off to get reprogrammed for the hot version. Is the only difference the highest setting on the hot program has a lot more power, but the other levels are the same? I can't wait to see how it runs. What level do you run it on when you are stacking it?

Also I was talking to a PPE engineer on the phone. He was saying that you can only reprogram the stock pcm so many times before you wear the chips out in the computer, and then it won't work any more. Do you guys think this is true? I have never heard of this before.

So Far So Good With The Hot Xcelerator. Some People Dont Like Them But I Have Had As Good Of Luck With It As I Have Any Other Performance Mod/box/tunner. Im Stacking It With The Hot Juice I Run The Juice On Level 3 And The Tunner On The Highest Setting. Im Not Running A Aux Fuel Pump So I Cannt Run It On Level 5 With Out Bursting Some, But It Doesnt Do It Near As Bad As My Quad Tuner Did :)

So when running the hot xcelerator it will throw an over boost code? Is it actually building to much boost, or is it the pcm just thinks it has too much boost?

Also I was talking to a PPE engineer on the phone. He was saying that you can only reprogram the stock pcm so many times before you wear the chips out in the computer, and then it won't work any more. Do you guys think this is true? I have never heard of this before.
Hate to say it but if PPE ever had an engineer they would have known better than to say that. Intel who makes the memory chips used in the LB7 PCM's rates them for a life cycle of 80 - 100 thousand cycles! AMD who makes the LLY memory chips rates their's at 100 thousand cycles too.

DieselTech,

Whats up with the 234? Is there really too much boost? Or a programing error?

How come they can't reprogram and make the 234 go away?

Hate to say it but if PPE ever had an engineer they would have known better than to say that. Intel who makes the memory chips used in the LB7 PCM's rates them for a life cycle of 80 - 100 thousand cycles! AMD who makes the LLY memory chips rates their's at 100 thousand cycles too.
I thought that sounded a little fishy myself. But that was his response to why some peoples programmers mess up. He said some times people will basically reprogram their pcm almost everyday, and that after a while the computer chips won't work because they have been "burned" to many times. He told me that after about 100-200 times the "chips" in the pcm are worn out.

The bottom line is PPE does not do programming they buy it pre done from someone else. We should know as we used to do it for them but we parted ways (thank god). They can only sell you what they have been sold nothing more nothing less. The rest of it is advertising hype! Programmers screw up for lots of reasons, the most common reason is that something begins communicating on the buss during programming and this will kill the programming every time. The question is do they know how to fix the PCM after the problem has occurred?

If you reprogram alot you will eventually get "stuck" during a program. It can happen the first time you program it, or the 1000th time. But just by random chance, it will happen. Battery dies, programmer locks up or fails, cable goes bad, cord gets pulled out, static, etc, etc. If you do change your programming alot, get a spare PCM. Our vette had been reprogrammed (by me) at least 100 times when I was learning what different things did. One day it did lock up at the racetrack, and luckly, it came back to life. Static? Who knows. It was programmed about 100 times after that as well.

I once wore out a window by looking through it every day...

[QUOTE=Diesel Tech]Programmers screw up for lots of reasons, the most common reason is that something begins communicating on the buss during programming and this will kill the programming every time. QUOTE]

Is this what pulling the fuses under the hood is for to eleminate elements that might operate during pcm communication?

Thanks for the help, I am curious and I like learning about this type of stuff.

This thread has offically been hijacked!

All these smart people and no 234 info. ( BTW search has very limited info.)

I once wore out a window by looking through it every day...

THATS KINDA LIKE THE OLD SAYING OF "YOU CANNT WEAR SOMETHING OUT THAT GREASES ITSELF" AND THERES ONLY ONE THING THAT I CAN THINK OF THAT DOES THAT ):h:ro)

:funnypost :lol:

"Hate to say it but if PPE ever had an engineer they would have known better than to say that. Intel who makes the memory chips used in the LB7 PCM's rates them for a life cycle of 80 - 100 thousand cycles! AMD who makes the LLY memory chips rates their's at 100 thousand cycles too."

Actually Gm switched to the AMD processor in 2003 because they were having a problem with the Intel ROM. Intel was having a terrible time and the AMD chip seems better. I have seen 1 AMD chip go bad though. I was under the impression that the chips were rated at 10,000 cycles, but one of us is probably forgetting or adding a zero!

"This thread has offically been hijacked!

All these smart people and no 234 info. ( BTW search has very limited info.)"

0234 reads Engine Overboost Condition

What this means is that at a given set of parameters the truck is making more boost psi than it thinks it should. This could be a condition that is caused by making a lot of horsepower very early in the rpm range at very light throttle positions.

To the best of my knowledge the newest versions of the tuner handle these problems? The programmer version is 1.23 with Rev 1.0.3 of software on it. This info will be apparent on the first 2 screens.

Also version 4.01 is almost here. I would highly recommend either speaking with JK or emailing the guys at Quadzilla about this. This new version will rock the tuner boat I believe. And it really does not have to do with any wizbang new tune.

Hope that helps, if you need more info I will try to get it for you. I hope I did not translate anything wrong. IF you have a QZ tuner and have this problem I would call or email them as they should be able to solve it.

Weldon

"Hate to say it but if PPE ever had an engineer they would have known better than to say that. Intel who makes the memory chips used in the LB7 PCM's rates them for a life cycle of 80 - 100 thousand cycles! AMD who makes the LLY memory chips rates their's at 100 thousand cycles too."

Actually Gm switched to the AMD processor in 2003 because they were having a problem with the Intel ROM. Intel was having a terrible time and the AMD chip seems better.
Weldon
Well I hope you mistyped or you are mis informed as GM still uses a Motorola processor and has since Quad was in diapers. The switch to the AMD memory device started in '03 but was not completed until the '04 model year. There were absolutely no problems with the Intel parts either! The switch was made because Intel was dropping that product line and Delphi did not want to change as new PCM's were coming out the following year with all new type devices, so AMD's were used to fill the gap. So for keeping it simple I used the first full year of production for a start date. This being said the BS that some people are feeding to other people is really pretty stupid when you truely know what's going on. 200 cycles max. on a memory device, give me a break.

LIke I said I hoped that I did not mis-translate any info. I saw someone ask a questions pertaining to Quadzilla so I tried to get an answer for them. I also asked about the 200 cycle thing and he gave me the information I typed, but obviously I made a few mis-interpretations. I am pretty sure you and Quad are on the same exact page.


Weldon

Well I didn't see any reference to Quad until you brought him up! The information you type was wrong and misleading, but $hit happens. The P0234 is a boost related code, what it means is the boost was wrong for the given conditions at the time the test was run. If your running a programmer the problem is from the programming changes not being correct for your application, most of the time. GM did have a problem on the early '01 but that was corrected long ago with a re-flash.

DTC P0234 (Federal RPO FE9)
Circuit Description
The boost sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with accelerator pedal position (APP) and engine speed. The engine control module (ECM) uses this information to assist in diagnosis of the barometric pressure (BARO) sensor and to provide engine overboost protection. The boost sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The ECM supplies 5 volts to the boost sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost sensor provides a signal to the ECM on a signal circuit relative to the pressure changes. The ECM monitors the boost sensor signal for voltage outside of the normal range. The ECM calculates a predicted value for the boost sensor. The ECM then compares the predicted value to the actual signal. This DTC will set if the boost sensor signal is above the predicted range.

Conditions for Running the DTC
DTC P0238 is not set.
The engine speed is less than 2,700 RPM.
The fuel quantity is less than 70 mm³.
The total fuel quantity burned is more than 2,000 mm³.
Conditions for Setting the DTC
The measured boost pressure is above the expected range by 35 kPa or more for 12 seconds.

Action Taken When the DTC Sets
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
The ECM limits fuel delivery.
Conditions for Clearing the MIL/DTC
• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.

• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.

• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.

• Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
Any changes to the induction system or exhaust system, such as the installation of aftermarket parts, may cause this DTC to set.
If the condition is intermittent, refer to Intermittent Conditions .

DTC P0234 (California RPO YF5)
Circuit Description
The boost sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with accelerator pedal position (APP) and engine speed. The engine control module (ECM) uses this information to provide engine overboost protection. The boost sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The ECM supplies 5 volts to the boost sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost sensor provides a signal to the ECM on a signal circuit relative to the pressure changes. The ECM monitors the boost sensor signal for voltage outside of the normal range. The ECM calculates a predicted value for the boost sensor. The ECM then compares the predicted value to the actual signal. This DTC will set if the boost pressure signal is above the predicted range.

Conditions for Running the DTC
DTC P0238 is not set.
The engine speed is more than 500 RPM.
Conditions for Setting the DTC
The measured boost pressure is above the expected range by 35 kPa or more for 12 seconds.

Action Taken When the DTC Sets
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
The ECM limits fuel delivery.
Conditions for Clearing the MIL/DTC
• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.

• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.

• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.

• Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
Any changes to the induction system or exhaust system, such as the installation of aftermarket parts, may cause this DTC to set.
If the condition is intermittent, refer to Intermittent Conditions .

V1.23 has apparently fixed my 0234 problem.

Yeah, Kartercraft hooked me up with Quad. I will be sending mine in for a reflash. It might just come back with some other goodies if I am lucky.

Dieseltech thanks for the in depth info on the ses234.

Anyone stack the Bully Dog Power Pup on the Edge w/attitude on the LLY?
I have the Pup on order and really Excitted to see how they mate.
Anyone out there that has done it please let me know.:cool:
Thank !!
thamilton@wmccat.com