1984 944 fuel injection question

[ktuckyderby]

what would cause the engine to run rich? what should i check first?

[zedsn]

faulty fuel regulator ,bad o2 sensor, vaccum line leaks maybe

[pfarah]

Also check your air filter and verify proper heat range spark plugs.

[ktuckyderby]

thanks guys i will change some parts on it and post what i find

[John_AZ]

Originally Posted by zedsn

faulty fuel regulator ,bad o2 sensor, vaccum line leaks maybe

+1^

Fuel pressure regulator.
Pull the vac hoses off the FPR & the damper. If you see gas drops replace.

J_AZ

[porschetub]

Originally Posted by John_AZ

+1^

Fuel pressure regulator.
Pull the vac hoses off the FPR & the damper. If you see gas drops replace.

J_AZ

All good possible causes but I would start with vacuum leaks first,afm pipe,warm up regulator/ICV (year dependant) and FPR and damper connections.
If you have any leaks you will most likely have a high idle .
What is your "rich '' condition ?