WOT Problem?

I'm not an expert but i would check fuel pressure. Might not be getting enough at wot. Clogged fuel filter could cause something like that.

Dump the codes and see what the computer says is wrong…

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.

See http://www.troublecodes.net/Ford/
OR
See http://www.dalidesign.com/hbook/eectest.html for more descriptive help
OR
See http://www.mustangworks.com/articles/electronics/eec-iv_codes.html

IF your car is an 88 stang, you'll have to use the test lamp or voltmeter method. There is no functional check engine light on the 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 Walmart.

sounds like an ignition problem. i'd look at the plugs wires rotor cap coil et..

Oil stang said:

Well thanks for your input but my CEL is not on or is it posible there are codes without the CEL?.

Click to expand...

you answered your own question and why JR posted for you to pull codes. the KAM can store codes which dont trip the CEL. intermittant problems like yours are especially likely to not toss the light (obd-II seems to be very touchy, but not our I's).

id pull codes. then i might check FP, as suggested (it is the next easiest thing to check). then if ok, try and track down ignition stuff. please be more specific. you said it happens at WOT, but then said it is worst at 3K rpm. so is it really really bad at 3K, or am i lost? does it do it with a hot motor, cold motor, both. etc.
good luck.