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Old 02-15-2006, 04:07 PM
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Default What NEEDS to be done with a new chip to up the boost?

Got an interesting situation.
Got my ECU rechipped from RaceSpec, ran a 3" turboback, and installed my FMIC...
First, I know I got issues because they sent me an EPROM for a 5 speed, and my car is an automatic. The Tranny Control Module itself is pitching a code for "wrong controller type", and the ECU is pitching two codes, one is for Catalyst Inefficiency(dont have a cat on the car), and Charge Pressure Negative Deviation. The other problem is the ASR is always lit, as if I have it turned off.
The Charge Pressure one is the one that has me. From my understanding it means the ECU is commanding a certain amount of boost, and only getting a certain, lesser amount.
I did some datalogging with VAG-COM, and the ECU is commanding at times up to 2200mBar. The highest it recorded was a spike to 1550mBar. Seeing as Im at Sea Level, thats only 7psi. Most of the times its holding 1400mBar, which is only like 6psi.
I have a Forge007 Diverter valve with the yellow(15-23psi) spring.
Im doubtful that the problem is loose connections, everything is T-Bolt clamped and at WOT the pressure is pretty steady.

My first inclination was a limp status because of the codes, but if that was the case the ECU wouldnt be commanding 2200mBar in VAG Com would it?

Does the N75 HAVE to be changed to get the boost up?? I thought you start changing N75s when you find it spikes too bad or something.

Inlet air temps range from 20-24deg C at WOT.

OH YEAH... APH code and the ultra crappy KO3(not S).. Even though its the plain K03, I dont think it could be incapable of providing more than 8psi...
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Old 02-15-2006, 04:23 PM
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You're going into limp mode methinks. Send it back and get an automatic program. That's the problem with everything.
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Old 02-15-2006, 04:29 PM
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Too Many Dubs....
 
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Car: Y2K NB Turbo, 92 Golf VR6, 86 GTI Turbo, 60 Euro Bug, 97 F150, 93 Mustang LX Coupe
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Yeah, thats what I was thinking.. But the ECU wouldnt be commanding the 2200mBar in VAG COM if that was the case, would it?
Or does the meausuring block in the VAG Com look at "pre-limp settings" for lack of a better term?
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Old 02-15-2006, 04:44 PM
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What's happening is this: the ECU is commanding the 1.2bar. There's no TCM provision in the manual ECU, so to be safe, it's locking itself out to 6-8psi because it can't sense what the transmission is doing. I was looking at their site, and I don't see an AT program...wonder how they will approach it.
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Old 02-16-2006, 12:30 AM
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Too Many Dubs....
 
Join Date: Dec 2005
Location:
Kissimmee, FL, USA
Car: Y2K NB Turbo, 92 Golf VR6, 86 GTI Turbo, 60 Euro Bug, 97 F150, 93 Mustang LX Coupe
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Well, as I was driving it around today I started hearing more of an air rush sound. I got home and found the hose that was running to the N75 split at the fitting on my boost pipe(all I could find the other day was a 3/16" nipple, the hose is 5/16 and was scrunched down).
I replaced the nipple with a larger one, and got a good connection there. I also replaced some of the vacuum lines on the engine, as they dont really fit tight anymore and dont use hose clamps. I also added a boost gauge, replaced the line for my diverter valve, and also replaced the dump hose for the diverter.
I havent vag com'd yet, but I drove down the street and the boost actually spiked to 15 on the gauge, then settled to about 12. Diverter valve sounds 100 times more normal.. It actually opens and closes distinctly, before it sounded open alot more often, so maybe the hose going to it wasnt very good, not putting enough pressure on the piston and letting it bleed. I dont know.

Im awaiting a call from those guys right now to try doing some stuff to recode the ECU as an automatic ECU again. Its still my old ECU, just has a different EPROM in it.
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Old 02-18-2006, 06:38 PM
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Too Many Dubs....
 
Join Date: Dec 2005
Location:
Kissimmee, FL, USA
Car: Y2K NB Turbo, 92 Golf VR6, 86 GTI Turbo, 60 Euro Bug, 97 F150, 93 Mustang LX Coupe
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Well, if I can get to a printer to make up a shipping lable and find a post office, looks like my stock EPROM is going to RaceSpec so they can add the tables to the stock auto prom. I finally opened my Bentley and it says the ECU for my car is not recodable.

Anyone ever log air mass with VAG COM? Seems like the highest I can get is around 150g/s of airflow, no matter what boost.. I also found my injector on time to 85-98% for most of the time on a WOT run...Stock injectors, stock 3 bar reg. I dont know if the chip is mapped really fat or if its the adaptation making it do that. My wideband is mounted in another car.


Weve also had alot of temperature fluctuations around here. When its 40 degrees out, It'll spike 13ish psi then go settle at 10. When it was like 70 degrees out, it would spike 15 and settle at 12-13.

I'd like to think its the turbo, but the car doesnt really feel all that fast. It is ALOT faster than stock, dont get me wrong. Stock it didnt have the power to break the tires loose, even if I footbraked the car. I was beginning to wonder if the ASR even had a purpose Now if I footbrake the car it will spin the tires all the way through first gear.

Anyone with a VAG-COM, and a chip, and a stock KO3(not KO3S) able to log their air mass readings and post up some peak numbers?
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