runs funny somtimes

[okietheranger]

ok so I have a fully rebuilt 89 mustang 5.0 in my 86 ranger. the engine is pretty much stock besides it has the E-303 cam. It starts and runs fine when cold and even when its warm but just somtimes if I let it idle for a while like in a drive thu it idles like this (posted link to video) i pulled codes and the only ones i got were KOEO 95-67-84 memory were 29-33-95

http://s544.beta.photobucket.com/user/motocross401/media/Picture019_zps20ca06c0.mp4.html

 

[v-8power]

I remember reading about the E cam causing idle surge. Do not remember if there is a work around or not.

 

[Dune Runner]

Does it stop if you rev it and clear it out?

 

[v-8power]

might check this out for more info. http://www.stangnet.com/mustang-forums/threads/help-me-create-the-surging-idle-checklist.698148/

 

[okietheranger]

It will stop sometimes if I rev it up pretty good. I won't do it when the engine is cold though.

 

[Teddyzee]

67 can cause idle surge. Correct that and do the "base idle reset" procure and you may be fine.

If you don't have a working neutral switch or clutch pedal position switch, you can just ground pin30 anywhere to get rid of code 67.

 

[okietheranger]

Ya I will try that. The code 67 also won't let me run the KOER test