Hi, i have a 2007 Lotus Exige S (it is a federal version, imported to Norway where i live)
A few weeks ago, on the german autobahn, on my way home from Nûrburgring, it started to misbehave betveen 2000-4500rpm, it is just like it holds back on power, and if i try to hold the trottle pedal steady, it is "behaving like a kangaroo" When checking the fault codes, it trows "P0171 powertrain too lean bank 1, and P0172 powertrain to rich bank 1"
I have checked for air leaks, with spraying starting gas around the engine, with no result. I have changed spark plugs (the old one looked fine) both O2 sensors, MAF sensor,and MAP sensor, but still the same.
We have also confirmed that fuel delivery/preassure is normal, and the same with exhaust preassure.
The car is ideling fine around 1000rpm, and runs great over 4500rpm. There is also no issues if i am reving the car at a stand still, it goes thru the whole rev range 1000-8400 without any hesitation.
Anyone else that have had this issue, or know what could cause it?
My local mechanic do not get all the information from the car on his diagnostics, and it is a 1000km drive to my nearest Lotus dealer in Copenhagen Denmark.
A few weeks ago, on the german autobahn, on my way home from Nûrburgring, it started to misbehave betveen 2000-4500rpm, it is just like it holds back on power, and if i try to hold the trottle pedal steady, it is "behaving like a kangaroo" When checking the fault codes, it trows "P0171 powertrain too lean bank 1, and P0172 powertrain to rich bank 1"
I have checked for air leaks, with spraying starting gas around the engine, with no result. I have changed spark plugs (the old one looked fine) both O2 sensors, MAF sensor,and MAP sensor, but still the same.
We have also confirmed that fuel delivery/preassure is normal, and the same with exhaust preassure.
The car is ideling fine around 1000rpm, and runs great over 4500rpm. There is also no issues if i am reving the car at a stand still, it goes thru the whole rev range 1000-8400 without any hesitation.
Anyone else that have had this issue, or know what could cause it?
My local mechanic do not get all the information from the car on his diagnostics, and it is a 1000km drive to my nearest Lotus dealer in Copenhagen Denmark.