revving problems

sounds like a fuel issue.check your pressure.possible bad regulator or pump.good luck

95opal said:

sounds like a fuel issue.check your pressure.possible bad regulator or pump.good luck

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or bad inertia cut off switch

or also check the fuel filter, it may be clogged.

could be the tps..................

maybe use a meter to check the ohms.

there is a tech about how to check the tps here

www.allfordmustangs.com

Loss of power on a warm engine at higher RPM is usally a sign of a TFI going bad.

Spend 2 cents for a paper clip and save 129.98...

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.mustangworks.com/articles/electronics/eec-iv_codes.html

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.

Or for a nicer scanner see http://www.midwayautosupply.com/detailedproductdescription.asp?3829 – It has a 3 digit LCD display so that you don’t have to count flashes or beeps.. Cost is $35.

86-93 5.0s mount the TFI on the distributor. It gets hot while it is running due to electrical resistance, engine heat and the hot air from the radiator.

The auto parts stores will test TFI's, but it isn't very reliable on Mustangs. The modules tend to fail when hot. Unless you have a hot air source to heat the TFI, you can't easily duplicate the type of heat a TFI module gets exposed to.