High & rough idle
05-06-2015, 08:11 AM
#1
Junior Member
Thread Starter
Join Date: Jun 2011
Location: michigan
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 iroc-z
Engine: supercharged 305
Transmission: automatic
Axle/Gears: 3.73
High & rough idle
I recently replaced the 305, with a 350 in my 1989 iroc-z. Had it dyno-tuned, but now the idle is high and rough and it takes a couple times for it to start. It does have an after market throttle body, but that was on the old engine also. It does run very good, when I'm driving though. Any suggestions would be appreciated
05-09-2015, 08:02 AM
#2
Supreme Member
Join Date: Apr 2013
Location: North Salt Lake
Posts: 1,353
Likes: 0
Received 1 Like
on
1 Post
Car: '86 Camaro, '94 Camaro, 3 others
Engine: LG4 ->L29, L32->LR4, L36, LG4, L31
Transmission: 700R-4, T5WC, 4L80E, SM465, 4L60E
Axle/Gears: 3.42, 3.23, WTB/WTT 2.93
Re: High & rough idle
Check for vacuum leaks, and check the idle air bypass.
Thread
Thread Starter
Forum
Replies
Last Post