i have checked all the grounds and the connections at the computer and everything seems to be connected..my maf sensor is working right, my iac is good and the tps is good. but its like as if something disconected from under the dash b/c it runs bad and it ran great before..if any suggestions please let me know?
I have changed my heater core in my 89 mustang and ever since then it has a rough idle and its dumping fuel?
Almost definitely a vacuum leak.
I have changed my heater core in my 89 mustang and ever since then it has a rough idle and its dumping fuel?
id just review your steps and see if you messed something up anywhere... sorry but that's really all i can say
You may have a vacuum hose that is disconnected. Does the heater and defroster function correctly? It is easy to leave a hose off. A dead give away is if you only have airflow coming from the defroster ducts in which case the vacuum supply hose is pinched or not connected. It is a black plastic hose as I recall. A vacuum leak can also make it run rough.
