mustang90242

because it acts up but then some days its perfectly fine

TrimDrip

have you tried reading the codes?

mustang90242

will it cause damage to the engine?

mustang90242

no i havent pulled the codes yet

TrimDrip

you need to get the leak fixed.

After a long period of time it can cause harm to you motor. You also won't pass a smog test with the rich fuel mixture at idle.

The leak is causing the car to pull in unmetered air that the maf is not reading. This can cause you to have some detonation.

If you pull the codes, you will most likely get a 41 and 91 code showing voltage to the 02sensors as lean. Probable get a code for the computer unable to maintain to idle too. An IAC code is 12.

Also, pull the IAC and clean it like mentioned above.

mustang90242

wats an IAC?

mustang90242

and how would i clean it? with carb cleaner or wd 40

19stang88

i heard lacquer thinner works good

TrimDrip

iac is on the front of the throttle body

i use brake cleaner for about everything, carb cleaner should work.

after you clean it make sure to pull the codes again to see if it still throwing a code for the iac

mustang90242

ok thanks