vacuum port caps !!

[glenntwincam]

today, while prepping car for our trips to watkins glen vintage & LOG. I noticed rubber caps on intake manifold vacuum ports just below throttle body, were starting to split , it's a svt , but every engine usually has vacuum ports that are capped . easy to fix , bought assortment at napa for $5 . if the cap comes off . you have a instant & large vacuum leak. just another thing to check next time you have the bonnet off.

[Taber10]

Plus one on that! Driving my brand new 2007 Caterham 7 SV from RMSC, Inc. home to Fla, I had problems in Alabama, about two hours from home. It seems that one of the caps had come off/been knocked off-lots of people were looking under the bonnet the whole way home. Ran fine at speed, but wouldn't idle at all. I was very relieved to find the problem and fix it for a couple bucks--package of caps and package of twist ties--which are still in the boot now nearly three years later!

[Dave W]

I would suggest that you put a little RTV on the I.D. of the cap, before installing it. I had a cap blow off from a back fire. Since adding the RTV, I have not had any problems.

Dave W