excelevant
Go Kart Champion
After problem after problem, I fear my Volkswagen experience is coming to an expensive end.
Last week, on the way home from having the ECU replaced by my tuner the car lost all boost and began sounding like an intercooler hose popped off, with a loud owl noise coming from the engine bay. It was the second time the key was turned by me since the ECU replacement. I stopped at the park for my nephews ball game then half a mile down the road on the way home I went to hit the gas and had 1% power. No codes, I threw the car up on some ramps and checked for a boost leak, no luck. My tuner has now spent a week inspecting everything, all piping, k04 & wg, doing multiple pressure tests, there is no sign of leaks anywhere in the system... wg functions fine, replaced the DV, replaced the N75 and still nothing.
The car makes 0 boost. It's like driving a 40hp GTI. While my tuner was driving the car around P0033 finally popped up which is what led to the replacement of the N75. I suggested a failed/clogged cat, as this is known to cause low/no boost issues in all cars. He pressure tested the exhaust and said he measured only 1psi of back pressure? I'm still a little fuzzy on this but according to him that means the exhaust should be fine.
We're both at the end of our rope, I've searched extensively on the topic and found nothing.
I'm done with VW, but don't know how I can even get rid of the car in this state. I think the only option left is to source another ECU, as the problem only surfaced once the ECU was replaced... which to me is a huge red flag that something went wrong somewhere, that maybe in some way the car doesn't accept the new ECU, blah blah. I'm not going to shell out the money to "try" a new ECU, and am thus forced to continue to attempt to sort this out at my tuners pace... which has been excellent by the way I just wish there was more I could do
The car has a CTS K04 on GIAC Extreme, and was previously on APR software.
Calling all tuners and forum wizards... I could use a solution
Last week, on the way home from having the ECU replaced by my tuner the car lost all boost and began sounding like an intercooler hose popped off, with a loud owl noise coming from the engine bay. It was the second time the key was turned by me since the ECU replacement. I stopped at the park for my nephews ball game then half a mile down the road on the way home I went to hit the gas and had 1% power. No codes, I threw the car up on some ramps and checked for a boost leak, no luck. My tuner has now spent a week inspecting everything, all piping, k04 & wg, doing multiple pressure tests, there is no sign of leaks anywhere in the system... wg functions fine, replaced the DV, replaced the N75 and still nothing.
The car makes 0 boost. It's like driving a 40hp GTI. While my tuner was driving the car around P0033 finally popped up which is what led to the replacement of the N75. I suggested a failed/clogged cat, as this is known to cause low/no boost issues in all cars. He pressure tested the exhaust and said he measured only 1psi of back pressure? I'm still a little fuzzy on this but according to him that means the exhaust should be fine.
We're both at the end of our rope, I've searched extensively on the topic and found nothing.
I'm done with VW, but don't know how I can even get rid of the car in this state. I think the only option left is to source another ECU, as the problem only surfaced once the ECU was replaced... which to me is a huge red flag that something went wrong somewhere, that maybe in some way the car doesn't accept the new ECU, blah blah. I'm not going to shell out the money to "try" a new ECU, and am thus forced to continue to attempt to sort this out at my tuners pace... which has been excellent by the way I just wish there was more I could do
The car has a CTS K04 on GIAC Extreme, and was previously on APR software.
Calling all tuners and forum wizards... I could use a solution
Last edited:
