2001 with Giac K04, Boost Problem
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1st Gear
Joined: Jun 2005
Posts: 31
From:
2001 with Giac K04, Boost Problem
I have a 2001 with ECU code CH. I got the k04 and the Giac chip.
Here's my problem. The car holds about 18-20 psi. I drive it around for about a week then I notice that the boost will
only go up to about 13-15 psi. I was frustrated the other day and I resetting the ECU by disconnecting the battery. Got in
the car and boost goes back up to 20 psi. After a few days boost is back down 13-15 psi. Reset the ECU and boost is back up again.
Any ideals of what's wrong? I have heard about 2001 with KO4 GIAC have the throttle closing when boosting over 21psi.
Here's my problem. The car holds about 18-20 psi. I drive it around for about a week then I notice that the boost will
only go up to about 13-15 psi. I was frustrated the other day and I resetting the ECU by disconnecting the battery. Got in
the car and boost goes back up to 20 psi. After a few days boost is back down 13-15 psi. Reset the ECU and boost is back up again.
Any ideals of what's wrong? I have heard about 2001 with KO4 GIAC have the throttle closing when boosting over 21psi.
2nd Gear
Joined: Jul 2005
Posts: 945
From:
RE: 2001 with Giac K04, Boost Problem
Have you replaced/upgraded your N75 valve?
You may have to use a boost controller in combination with your N75 valve as us DBW guys have that throttle closing problem. You may be hitting the 21psi and just don't know it for a split second.
You may have to use a boost controller in combination with your N75 valve as us DBW guys have that throttle closing problem. You may be hitting the 21psi and just don't know it for a split second.
2nd Gear
Joined: Aug 2005
Posts: 626
From:
RE: 2001 with Giac K04, Boost Problem
ORIGINAL: north5995
Have you replaced/upgraded your N75 valve?
You may have to use a boost controller in combination with your N75 valve as us DBW guys have that throttle closing problem. You may be hitting the 21psi and just don't know it for a split second.
Have you replaced/upgraded your N75 valve?
You may have to use a boost controller in combination with your N75 valve as us DBW guys have that throttle closing problem. You may be hitting the 21psi and just don't know it for a split second.
Actually, it may be more than just an overboost problem.
GIAC has come out with the "hammer" file which requires larger injectors and a TT225 MAF (at a minimum) to resolve the throttle closing problem. The thinking is that the ECU is shutting down the throttle body based on a number of conditions that it considers "unsafe". Namely, the problem occurs at high boost, high load and high rpm.
Those conditions require the fuel injectors (even at 5 bar) to excede the normal operating duty cycles of the stock injectors for too long. (How long is too long? Dunno. Several milliseconds?) In order to prevent the engine from running distructively lean due to sudden injector failure, the ECU shuts the throttle body down.
So...using all sorts of crazy work arounds may diminsh the symptoms, but they don't cure the problem.
I haven't heard of any other major chip maker offering a software only solution for the K04. Does APR? (I know Revo doesn't.)
2nd Gear
Joined: Apr 2004
Posts: 787
From: Norristown, PA
RE: 2001 with Giac K04, Boost Problem
Where did you read about this hammer file?
I've read about where the Torque Factory's is doing some tuning with GIAC for the '00 and '01 but, last I heard they were just calling it FX, like the B6 K04 file. The "FX" file is also supposed to fix these problems.
I've read about where the Torque Factory's is doing some tuning with GIAC for the '00 and '01 but, last I heard they were just calling it FX, like the B6 K04 file. The "FX" file is also supposed to fix these problems.
2nd Gear
Joined: Aug 2005
Posts: 626
From:
RE: 2001 with Giac K04, Boost Problem
ORIGINAL: dafrazi
Where did you read about this hammer file?
I've read about where the Torque Factory's is doing some tuning with GIAC for the '00 and '01 but, last I heard they were just calling it FX, like the B6 K04 file. The "FX" file is also supposed to fix these problems.
Where did you read about this hammer file?
I've read about where the Torque Factory's is doing some tuning with GIAC for the '00 and '01 but, last I heard they were just calling it FX, like the B6 K04 file. The "FX" file is also supposed to fix these problems.
2nd Gear
Joined: Jul 2005
Posts: 945
From:
RE: 2001 with Giac K04, Boost Problem
ORIGINAL: JettaRedII
Actually, it may be more than just an overboost problem.
GIAC has come out with the "hammer" file which requires larger injectors and a TT225 MAF (at a minimum) to resolve the throttle closing problem. The thinking is that the ECU is shutting down the throttle body based on a number of conditions that it considers "unsafe". Namely, the problem occurs at high boost, high load and high rpm.
Those conditions require the fuel injectors (even at 5 bar) to excede the normal operating duty cycles of the stock injectors for too long. (How long is too long? Dunno. Several milliseconds?) In order to prevent the engine from running distructively lean due to sudden injector failure, the ECU shuts the throttle body down.
So...using all sorts of crazy work arounds may diminsh the symptoms, but they don't cure the problem.
I haven't heard of any other major chip maker offering a software only solution for the K04. Does APR? (I know Revo doesn't.)
ORIGINAL: north5995
Have you replaced/upgraded your N75 valve?
You may have to use a boost controller in combination with your N75 valve as us DBW guys have that throttle closing problem. You may be hitting the 21psi and just don't know it for a split second.
Have you replaced/upgraded your N75 valve?
You may have to use a boost controller in combination with your N75 valve as us DBW guys have that throttle closing problem. You may be hitting the 21psi and just don't know it for a split second.
Actually, it may be more than just an overboost problem.
GIAC has come out with the "hammer" file which requires larger injectors and a TT225 MAF (at a minimum) to resolve the throttle closing problem. The thinking is that the ECU is shutting down the throttle body based on a number of conditions that it considers "unsafe". Namely, the problem occurs at high boost, high load and high rpm.
Those conditions require the fuel injectors (even at 5 bar) to excede the normal operating duty cycles of the stock injectors for too long. (How long is too long? Dunno. Several milliseconds?) In order to prevent the engine from running distructively lean due to sudden injector failure, the ECU shuts the throttle body down.
So...using all sorts of crazy work arounds may diminsh the symptoms, but they don't cure the problem.
I haven't heard of any other major chip maker offering a software only solution for the K04. Does APR? (I know Revo doesn't.)