Running rich

[Project89]

Newly built 306 block: d-600procharger, trick flow heads, edelbrock performer upper/lower, shorty headers c&l 30mm, 30lb injectors, 70mm edelbrock throttle body, etc.etc. 10 degree timing having problems with engine bogging and running rich (tailpipes black) and fouling plugs. tps @.998, 40lbs fuel pressure, fmu is from pro charger, cannot find any vaccum leaks vaccum @10inches (elgin cam). have no idea where to go next . Compression is good, engine barely broken in.

 

[jrichker]

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.

See http://www.troublecodes.net/Ford/

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.

89 through 95 cars have a working Check Engine light. Watch it instead of using a test lamp.

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 Wal-Mart.

Or for a nicer scanner see http://www.midwayautosupply.com/pc-7208-90-equus-digital-ford-code-reader-3145.aspx – It has a 3 digit LCD display so that you don’t have to count flashes or beeps.. Cost is $30.

 

[93lxdm78]

I am surprised your running rich I would think lean if anything with that set up I have same injectors less the charger and I am at 41 fp with no issues are your backfires coming from the front or rear of the car ?

Try adjust the pressure up two to three psi see if it gets worse.

 

[Project89]

Going to try the codes. The backfires are coming from the intake manifold, will also try to up the FP. Thanks for the info.