Random check engine and idle?!

[Kyler91lx]

So this morning i started my car and let it warm up for ten minutes and left to the store and i was sitting in my car and it was idling normally and out of know where it got a check engine light and had a very rough idle and after a minute or so the idle went back to normal and the check engine light went away. About two minutes later it did the same thing and died. then I started it and it did the same thing right away, i drove it home and half way their the check engine light went away and was running good again. Do any of you guys know why the car could be doing this or what’s causing it ?

 

[JD1964]

Nab one of these code readers and see what is stored in the memory. It comes with a little book to give some sense of diagnosis based on the info it gives you. There's another way to get the codes without the tool, but the tool is pretty cheap and handy if you have Foxbody with EEC-IV computer

Amazon product ASIN B000EW0KHWView: https://www.amazon.com/INNOVA-3145-Ford-Digital-Reader/dp/B000EW0KHW/ref=asc_df_B000EW0KHW/?tag=hyprod-20&linkCode=df0&hvadid=312158556601&hvpos=1o4&hvnetw=g&hvrand=8798926599665824810&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9007881&hvtargid=aud-801381245258la-434264198620&psc=1

 

[Kyler91lx]

I did, their was only one code and it was (67) and i could not do a engine off code scan for sum reason

 

[General karthief]

Electrical - How To Pull Codes From EEC-IV In 86- 95 5.0 Mustangs

@Noobz347 - The code dump procedure isn't in the sticky - you may want to add it... Dump the codes: Codes may be present even if the Check Engine Light (CEL) isn't on. Dumping the computer diagnostic codes on 86-95 Mustangs Revised 26-July-2011. Added need to make sure the clutch is...

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