M42 / Check Engine Light Idling / Rough Idle After Start

[hamann318is]

I ran Sea Foam through my car yesterday, following Ken's procedure. Ever since burning all the Sea Foam out, my car has been acting very weird. Whenever I start the car (sitting cold or after driving for a while), the car will have a very rough idle for about 15 seconds, and then idle fine afterwards (revving helps this situation).

While driving it around and I'm at a stop light idling, the Check Engine light will come on after about 30 seconds of idling. The light will go away if I rev to about 1200.

The car does drive a bit better than before, which makes me wonder what's going on. Some other things that come to mind... the car dieseled after running 1/2 a can through the vaccum line coming off the FPR. Any help will be appericated!

[Rob]

vacuum leak?

[hamann318is]

vacuum leak?

Figures I find the loose line after I post.

[e9nine]

vacuum leak?

Figures I find the loose line after I post.

[graphikg]

I am ressurecting this post because I use the search, and it is exactly my situation. How can I find my vaccum leak though? How do I know which hose to check/replace?

[gearheadE30]

Check any hoses that you messed with when you did the seafoam, as well as any rubber lines the seafoam logically could have entered. From there, you just have to visually inspect all hoses for cracks and wear. It is definitely an exercise in patience...