running too rich

[eddie8]

I have a 1983 944 that I cannot stop from running rich. Did tune-up, tried new mass flow sensor but noting seems to help.

[930guy]

try temp sender

[eddie8]

Thanks 930guy. I'll try thay.

[neo the hacker]

Check lamda sensor, (oxy sensor), if its giving a false reading the ECU could over fuel. does it have a CAT on a car as old as that in the US?

[eddie8]

Thanks neo. The o2 is on the money according to alldata. This car does have a cat.

[neo the hacker]

No problem. Wasn't sure if it had a cat, i no you guys are a bit strict when it comes to cars.

[xveganxcowboyx]

We got CAT's in the early to mid seventies set as law. Don't remember the exact year, but you can assume any car from mid-seventies up is legally required to have a cat.

[neo the hacker]

I was 94 when we had to have CATS by law. Even now tho, people still fit replacment pipes for more power, and then refit them for the MOT test each year.