my engine light comes on once the car is warmed up, like say after i get off the highway and im goin down a normal road, it comes on, any ideas??
o2 sensor?
heres a link (below) if you can't find anyone to pull codes you can pull them yourself with a test light or an analog voltmeter http://www.muscularmustangs.com/test1.php
Stored codes reamain resident for 87 startup cycles.
Dump the codes and see what the computer says is wrong… Codes can be present without setting the Check Engine Light.
Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great.
IF your car is an 86-88 stang, you'll have to use the test lamp or voltmeter method. There is no functional check engine light on the 86-88's except possibly the Cali Mass Air cars.
Codes have different answers if the engine is running from the answers that it has when the engine isn't running. It helps a lot to know if you had the engine running when you ran the test.
Trouble codes are either 2 digit or 3 digit, there are no cars that use both 2 digit codes and 3 digit codes.
For those who are intimidated by all the wires & connections, see http://www.actron.com/product_detail.php?pid=16153 for what a typical hand scanner looks like. Normal retail price is about $30 or so at AutoZone or Walmart.