Another Seafoam question..

[Yuzilla]

I finally got around to running seafoam into the brake booster line. I have done this before on my old truck (99 Tahoe 5.7) and everything went well. I finally got around to running seafoam into my new truck 02 yukon 5.3 and exprienced something different. I ran half a can through and shut the engine off so I could let it sit for a while. While pouring in the I got the usual engine surge, etc. After I shut the engine down, the engine kept chugging like my moms old 81 Buick used to do when you turn it off. It kept chugging for about 15-20 seconds.

 

Has anyone experienced this and what causes this?

[s2gots]

I had similar effects on my 99 6.0..I used the PCV hose. I could not get the engine to die...it just kept chugging....I just shut her down...started up after 20 min...and all was fine...even the cool smoke job!!!!

[Yuzilla]

Same thing here. Runs much better now. Thanks.

 

I had similar effects on my 99 6.0..I used the PCV hose. I could not get the engine to die...it just kept chugging....I just shut her down...started up after 20 min...and all was fine...even the cool smoke job!!!!