Hello Mike,
Recently I've installed a forge twintake on my golf R and have been lovin it.
However after doing some logging my fuel trims showed rather lean values, up to 14.5%:yikes:
At first thought typical: too much boost on my tune + aftermarket intake = leaner mixture. But 14.5 is really high, so checked my boost levels and all seems pretty reasonable for a stage 1 ko4: peak is at 20-21psi holding at 17-18psi.
Had no DTCs, but cleared the codes so the fuel trim values would be reset at 0. After the reset I drive the car for 7-8 minutes completely off-boost, changing gears at 1,800rpms (so the intake is practically not "pulling air" and the turbo not spooling), and my longterm fuel trim sits at +1.4% and my short term at +10.2%
My guess would be a vacuum leak... Probably related to the installation process of the twintake, any thoughts or advice?
Any ideas on what I should be checking?
Thx a lot
Recently I've installed a forge twintake on my golf R and have been lovin it.
However after doing some logging my fuel trims showed rather lean values, up to 14.5%:yikes:
At first thought typical: too much boost on my tune + aftermarket intake = leaner mixture. But 14.5 is really high, so checked my boost levels and all seems pretty reasonable for a stage 1 ko4: peak is at 20-21psi holding at 17-18psi.
Had no DTCs, but cleared the codes so the fuel trim values would be reset at 0. After the reset I drive the car for 7-8 minutes completely off-boost, changing gears at 1,800rpms (so the intake is practically not "pulling air" and the turbo not spooling), and my longterm fuel trim sits at +1.4% and my short term at +10.2%
My guess would be a vacuum leak... Probably related to the installation process of the twintake, any thoughts or advice?
Any ideas on what I should be checking?
Thx a lot