low vaccum after boosting
#1
Full Member
Thread Starter
Join Date: Mar 2003
Location: Silent Hill
Posts: 206
Likes: 0
Received 0 Likes
on
0 Posts
low vaccum after boosting
Just did a rebuild and have run the car in.. it runs fine.. except for the idle vaccums is low.. at 900 rpms the vaccum is -6 psi i think 300 mmhg ....
Its just that after a run the idle drops to 750rpms and the vaccums drop to -4 psi or 200 mmhg.. I am confused.. also the car is running rich all around...
But it feels really fast.. and the exhuast pressure coming out of the exhuast at idle is too much.. i can stand like 4-5 feet away from the car and feel the pressure...
Sometimes after i take a full boost run and then turn off the car and then after 5-10 mins turn it on .. there is a lot of black smoke from the exhuast and it starts like a V8 and then after 1 minute of idling becomes ok..
there is slight shaking too in the engine at idle..
what can it be?
thanks
Its just that after a run the idle drops to 750rpms and the vaccums drop to -4 psi or 200 mmhg.. I am confused.. also the car is running rich all around...
But it feels really fast.. and the exhuast pressure coming out of the exhuast at idle is too much.. i can stand like 4-5 feet away from the car and feel the pressure...
Sometimes after i take a full boost run and then turn off the car and then after 5-10 mins turn it on .. there is a lot of black smoke from the exhuast and it starts like a V8 and then after 1 minute of idling becomes ok..
there is slight shaking too in the engine at idle..
what can it be?
thanks
Thread
Thread Starter
Forum
Replies
Last Post
rgordon1979
3rd Generation Specific (1993-2002)
40
03-15-22 12:04 PM