Car shuts off...

abrfan

New Member
Aug 1, 2006
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i got a 1987 ford mustang gt t tops with no mass air meter.........i just recently changed the upper and lower intake and spacer and throttle body and i never hooked up the map sensor and i drove around for a minute without it hooked up lots of black smoke........well my neighbor told me it needed to be hooked up and i did research and found out what and were it was and remebered i didnt hook it back up when i put my new parts on i did and the cars idle smoothed out and it quit smoken ran really nice for about 40 seconds and it just shut off.........wouldnt start so i waited a minute and it started and ran for about 30 seconds and shut off.......its as if the car is shutting down when it reaches running temperatures....does anyone got any suggestions
 
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Does the car restart easily after it shuts off?

Dump the codes and see what the computer says is wrong… Codes can be present without setting the Check Engine Light.

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.
 
On a SD car with the hose disconnected, the puter thinks you're at WOT.

I remember such a thread as this some time back but I don't recall that individual's solution (his car ran better with the MAP sensor disconnected and would stall with it connected).

Grabbing codes and checking for vac leaks, as everyone suggested, is a great place to start.

Good luck.