i`ve got a 94gt. BBKcoldair intake,e303cam,gt40 heads,bbk big tube headers,24 lbs.injectors. I got the fuel pressure set at 35 and it still burns rich.Any one have suggestions thanks.
i had a o2 sensor pigtail get too close to my header once and it melted a wire, so because the computer couldnt get a good reading from that bank then it thought it was in a constant lean state so it kept telling itself to dump more gas to richen it up.
Since the calibration of your nose is very questionable, here is a better way...
Dump the codes and see what the computer says is wrong…Codes may be present in the computer even if the Check Engine light isn’t on.
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. You watch the flashing test lamp or Check Engine Light and count the flashes.
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.
The STI has a gray connector shell and a white/red wire. It comes from the same bundle of wires as the self test connector.
89 through 95 cars have a working Check Engine light. Watch it instead of using a test lamp.
The STI has a gray connector shell and a white/red wire. It comes from the same bundle of wires as the self test connector.
There is a single dark brown connector with a black/orange wire. It is the 12 volt power to the under the hood light. Do not jumper it to the computer test connector. If you do, you will damage the computer.
What to expect:
You should get a code 11 (two single flashes in succession). This says that the computer's internal workings are OK, and that the wiring to put the computer into diagnostic mode is good. No code 11 and you have some wiring problems.
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.
Alternate methods:
For those who are intimidated by all the wires & connections, see Actron® for what a typical hand scanner looks like. Normal retail price is about $30 or so at AutoZone or Wal-Mart.
Or for a nicer scanner see EQUUS DIGITAL FORD CODE READER (3145) – It has a 3 digit LCD display so that you don’t have to count flashes or beeps.. Cost is $30.
Are you running the stock computer or did you move pins to run an A9L. Reason I ask is that the computer for the 94-95 GT Blows you know what. Those computers have when you do any mods to the motor. And from what you have said you have a few items done. You will never get the power or driveability out of that computer that you want. The computer may not be all of your issue but I would not rule it out. I would start with a Wide Band so that you have a starting point. I would look into putting in the A9L computer, I did it in my 95 and it ran and drove a 100 times better than the other computer even when the car was stock. I put Pro-M's PIH harness on my car, which included a fan controler and a Bap sensor along with the instructions on what pins on the main harness to relocate. It was a sinch. Im not sure is Pro-M still carries those any more but with a little bit of serching Im sure you could find that diagram that show what pins to put where as well as how to wire in the Bap sensor, and you dont really need the fan controler, you could just wire up the fan to Key on.