High Idle at start-up.
09-17-2008, 04:13 PM
#1
Registered User
Thread Starter
Join Date: Aug 2005
Location: PDX, Oregon
Posts: 420
Likes: 0
Received 0 Likes
on
0 Posts
High Idle at start-up.
So first off, I've searched, so cool it. I'm just not finding the same issues previously posted, but hey maybe I'm just retarded eh?
So brand new, well 5k on it, 22RE. All new bits like the TPS blah blah blah. Lately when I start it up in the morning or when ever, it'll sit at the set idle for a minute, then it inches up to about 2k. It doesn't effect driving at all, although at high RPM's I have felt a "cough" from the motor, and after driving for a few miles it goes away. What the hell could be going on? I know I need to take it in and have it tuned now that the motor is a little more broken in (I think I'm running a bit rich right now) but I fail to see how this could effect an EFI motor.
Any suggestions?
Cheers
Dave
So brand new, well 5k on it, 22RE. All new bits like the TPS blah blah blah. Lately when I start it up in the morning or when ever, it'll sit at the set idle for a minute, then it inches up to about 2k. It doesn't effect driving at all, although at high RPM's I have felt a "cough" from the motor, and after driving for a few miles it goes away. What the hell could be going on? I know I need to take it in and have it tuned now that the motor is a little more broken in (I think I'm running a bit rich right now) but I fail to see how this could effect an EFI motor.
Any suggestions?
Cheers
Dave
09-17-2008, 05:30 PM
#2
Registered User
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes
on
4 Posts
2k sounds a bit high for cold idle.
my wife's 91 goes through a similar situation- around 850 at first start then climbs up to around 1200, then drops down to normal idle.
I'd double check the idle speed and timing with the engine warm, the valve adjustments and look for any vacuum leaks. If you haven't done it already, you might try dribbling some seafoam or spraying some throttle body cleaner into the vacuum hoses that go into the air valve under the throttle body so see if maybe something is sticking.
my wife's 91 goes through a similar situation- around 850 at first start then climbs up to around 1200, then drops down to normal idle.
I'd double check the idle speed and timing with the engine warm, the valve adjustments and look for any vacuum leaks. If you haven't done it already, you might try dribbling some seafoam or spraying some throttle body cleaner into the vacuum hoses that go into the air valve under the throttle body so see if maybe something is sticking.
09-17-2008, 05:35 PM
#3
Registered User
Thread Starter
Join Date: Aug 2005
Location: PDX, Oregon
Posts: 420
Likes: 0
Received 0 Likes
on
0 Posts
2k sounds a bit high for cold idle.
my wife's 91 goes through a similar situation- around 850 at first start then climbs up to around 1200, then drops down to normal idle.
I'd double check the idle speed and timing with the engine warm, the valve adjustments and look for any vacuum leaks. If you haven't done it already, you might try dribbling some seafoam or spraying some throttle body cleaner into the vacuum hoses that go into the air valve under the throttle body so see if maybe something is sticking.
my wife's 91 goes through a similar situation- around 850 at first start then climbs up to around 1200, then drops down to normal idle.
I'd double check the idle speed and timing with the engine warm, the valve adjustments and look for any vacuum leaks. If you haven't done it already, you might try dribbling some seafoam or spraying some throttle body cleaner into the vacuum hoses that go into the air valve under the throttle body so see if maybe something is sticking.
Cheers
Dave
09-17-2008, 05:47 PM
#4
Registered User
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes
on
4 Posts
the valve adjustment is pretty simple, if you're so inclined.
the clearances are .008" intake valve and .012 exhaust with the engine at warm/normal temperature (some people report slightly better performance and quieter operation at .007 and .011)
the procedure basically involves removing the valve cover and rotating the engine until one cylinder has both valves loose then adjusting them, then rotate the engine until the next cylinder has both valves loose, adjusting, repeating until all 4 cylinders are done.
the clearances are .008" intake valve and .012 exhaust with the engine at warm/normal temperature (some people report slightly better performance and quieter operation at .007 and .011)
the procedure basically involves removing the valve cover and rotating the engine until one cylinder has both valves loose then adjusting them, then rotate the engine until the next cylinder has both valves loose, adjusting, repeating until all 4 cylinders are done.
Thread
Thread Starter
Forum
Replies
Last Post
