changed out the transmission with a used one it was working fine instulled it now…
Feb 172013
My Z car (standard 4 speed ) doesn’t idle down when at a stop sign, and occasionally the engine revs to 3000 RPMs when sitting at a stop sign, any suggestions?
The most common cause for this issue would be vacuum leak. You will need to look closely at all your engines vacuum lines and hoses for a crack or hole. Replace them as needed.
A trick I use to help locate vacuum leaks is to spray brake wash around the hoses with the engine running and listen for a change in the engine.