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Discussion Starter #1
I went to my mechanic (long time VW/Audi performance specialist and APR reseller) to get an APR chip and TT exhaust. FYI: the only other engine mods I have are Sachs clutch, lightened flywheel, Forge DV, K&N filter and a new MAF.

When I got the car back and plugged the gas but there was no real difference. It felt completely stock. So I had my mechanic ensure that the engine was not throwing any codes and I dynoed my car against a stock 1.8T turbo Golf and came up only 5hp ahead of him. I came up with a low run of 142hp and a high of 147hp.

So we verified through VAG-COM that the chip was only requesting a stock level of boost and sent it back to APR. They checked it and said it was running the correct program, flashed it again just to be sure and then sent it back to us. I drove it today and there is still no change in power. We have not hooked it back up to VAG-COM yet, that will be done Monday. APR says they have never had this problem before.

I am sure my mechanic and fairly sure APR will keep looking at this until they find the problem, but I’d be extremely ignorant not to see if you guys can come up with any ideas. Especially considering that if someone here hasn’t seen a problem before it usually hasn’t happened. Any help would be apreciated.

:shock: :mad: :crazy:
 

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make sure your N75 didn't crap out on you.

check for vacuum leaks.

make sure your wastegate is functioning properly.
 

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The vag-com should tell all, but no codes and stock requested boost, it really does look like the programming. Did the actual boost match up to the requested boost? If the program was overboosting to limp mode and putting you back to stock boost, you'd have a code. If boost sensor was sending a bad signal. you'd throw a code. I think there is a program check to coolant temp and/or IAT in the boost map which could limit requested boost, but if there was a problem with those signals, you'd probably have a code also. An extreme step, but if you had access to a matching, chipped APR ecu, switch it with yours and see what happens. Possibly your mechanic buddy can hook you up with somebody else he sold to. Good luck.
 

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Discussion Starter #7
As I understand it from my mechanic, there is no problem with boost leak anywhere in the system and the car is only requesting stock boost. We haven't hooked it up to VAG-COM after the second flash yet, that comes Monday. Also, APR support tells me if the car is only requesting stock boost that request has to be coming from the code on the chip itself. I was not aware if anything else in the car could interfere with the chip's requested boost level and they said no. Please tell me more about "limp mode" though. Does the limp mode feature exist in APR's coding?
 

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if you have a 2000 or newer you need to log block 115 requested vs. actual boost. if requested is ~2000 mbar but actual is less, then there is a problem with the car. if requested is not this high, then its a software issue.


you should also log block 3 to make sure the TB is open 100% and see what the ignition timing looks like.

what year is your car, which ECU code, and how were you programmed, via chip or by DPP?
 

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Thanks for the specific info scotty, I'll take that to the shop when we run the check on monday. It's a 2000 but I don't know the ECU code and its was chipped at APR via chip replacement and they flashed it twice.
 

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Discussion Starter #10
Well, VAG-COM now says the requested boost is OK and the chip is working properly. Its reading 2000mb as opposed to 1300 before. But now this extra boost has revealed a boost leak... somewhere. They said they drained about 1/2 of a pop can worth of oil from the intercooler and one hose virtually disintegrated when they removed it as well as a kink in another hose by the diverter valve. I'm sure once they go through it the car will work fine. :D
 
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