I have an abornally high RPM (2000) while coasting and comming to a stop. After I stop RPM slowly return to normal 1k and idle is fine. It's only while driving I have this problem.
If I put car in neutral RPMs easily go up to 2200 and slowly (sometimes 20 seconds later) return to 1k idle.
It's like the computer is over-compensating --normally the ecm holds a slighly higher RPM when slowing to a stop to prevent stalling..this is normal ecm stradgey; but; it's over doing it...2000 rpm instad of like 1200 and it takes longer to respond to the fact that I let off the gas and comming to a stop.
Car basiclaly drives itself down the road without throttle...doesn't appear to be mechanical such as the throttle cable sticking because of the way it acts is definately ecm control.
I notice a "whine" from either the distributor or the front of the intake...hard to tell if it's a vacuum leak or if it's maybe the bearing from the dizzy?? could the dizzy itself leak air from maybe the oring? When I shut off the car the noise lingures and slowly goes away...sounds like air to me, but when the car is running it sounds like a supercharger whine almost...could be I have both issues? bearing from dizzy whining and an air leak?
I have low manifold vacuum at 12....I would think it should be at 14 or 15 with my cam: XE266HR
I'll try to take a video and post it....
Nicole
If I put car in neutral RPMs easily go up to 2200 and slowly (sometimes 20 seconds later) return to 1k idle.
It's like the computer is over-compensating --normally the ecm holds a slighly higher RPM when slowing to a stop to prevent stalling..this is normal ecm stradgey; but; it's over doing it...2000 rpm instad of like 1200 and it takes longer to respond to the fact that I let off the gas and comming to a stop.
Car basiclaly drives itself down the road without throttle...doesn't appear to be mechanical such as the throttle cable sticking because of the way it acts is definately ecm control.
I notice a "whine" from either the distributor or the front of the intake...hard to tell if it's a vacuum leak or if it's maybe the bearing from the dizzy?? could the dizzy itself leak air from maybe the oring? When I shut off the car the noise lingures and slowly goes away...sounds like air to me, but when the car is running it sounds like a supercharger whine almost...could be I have both issues? bearing from dizzy whining and an air leak?
I have low manifold vacuum at 12....I would think it should be at 14 or 15 with my cam: XE266HR
I'll try to take a video and post it....
Nicole