High exhaust values on low rpm

[haxxdags]

Hello!

I dont have any cheak engine light anymore on my m70b50 and the car runs better then before.

But the exhaust numbers is high on low rpm and the car want to jump a bit when driving in first and second gear ( not fun to drive ). When reving or driving on the highway the car runs fine and the exhaust values are good but as soon as the car starts to run a bit lower it dont feel ok. The o2 sensors have never been replaced can it be that? or the MAFs is out of calibration?

regards

[rjjablo]

Likely a vacum leak after the MAF's. Smoke test is the best diagnostic

[haxxdags]

Likely a vacum leak after the MAF's. Smoke test is the best diagnostic

Did a smoketest, no vacuumleak. The car is also sometimes hard to start after a drive.

[rjjablo]

Number of items that could cause it. Are you running the correct NGK Low resistance plugs? If you are pull them and inspect. Check all the plug wires for 6K Resistance. Inspect Caps and Rotors, measure coils hot and cold, Could be O2 sensor and if never changed needs to be done but $100 for the two of them. Pull apart and clean throttle bodies. Start with cheap and easy

[haxxdags]

Number of items that could cause it. Are you running the correct NGK Low resistance plugs? If you are pull them and inspect. Check all the plug wires for 6K Resistance. Inspect Caps and Rotors, measure coils hot and cold, Could be O2 sensor and if never changed needs to be done but $100 for the two of them. Pull apart and clean throttle bodies. Start with cheap and easy

Do you have art number for the o2 sensors? are they the same or 2 diffrent types?

Regards