What is the proper way to set timing on a 90 lx.5.0


Jan 1, 2006
I have a 90 lx 5.0 with an explorer u/l intake an E cam c&l 76mm mas 24lb injectors cold air intake 3.73's I set the timing on what was showing to be 12 degrees on the light, and the car just does not pull like I think it should also no knock at all. I set the timing this way, I pull out the plug start the car set timing shut car off and reinstall the plug(small chip near dist.). I have a 99 grand prix gtp that I feel will kill the mustang and it is a 4 door grocery getter. Any suggestions on what I should do would be appreciated. Thank you...
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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/
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.