why does my car start at 2500 rpm on cold start?
#1
Honda-Tech Member
Thread Starter
Join Date: Jan 2002
Location: tx
Posts: 1,349
Likes: 0
Received 0 Likes
on
0 Posts
why does my car start at 2500 rpm on cold start?
every morning i start my car and its at 2500 and as a warms up, it goes back to idle. does anyone know whats going on?
#2
Honda-Tech Member
Join Date: Dec 2001
Location: Filthadelphia Area, PA, USA
Posts: 1,568
Likes: 0
Received 0 Likes
on
0 Posts
Re: why does my car start at 2500 rpm on cold start? (wickedxboi)
its part of the program in the ecu to help the engine warm up faster and keep it running on those cold starts
#3
Honda-Tech Member
Thread Starter
Join Date: Jan 2002
Location: tx
Posts: 1,349
Likes: 0
Received 0 Likes
on
0 Posts
Re: why does my car start at 2500 rpm on cold start? (racerxadam)
so its electrical? i was thinking the fast idle valve or something. i have a b17a in my crx converted to obd 1
#4
Honda-Tech Member
Join Date: May 2001
Location: Tallahassee, FL, US
Posts: 7,190
Likes: 0
Received 0 Likes
on
0 Posts
Re: why does my car start at 2500 rpm on cold start? (wickedxboi)
2500 is a little high actually. what does it idle at normally? what kind of plugs are you using? fuel pressure?
#5
Member
Re: why does my car start at 2500 rpm on cold start? (wickedxboi)
inspect the fast idle valve, which is either mounted to the throttlebody or on the intake manifold near the TB.
#6
Re: why does my car start at 2500 rpm on cold start? (RioNinja)
Tighten your idle adjustment screw. When the engine is at "normal" operating temp. then adjust your idle screw to the 700+/- 50 rpm. Then recheck when the engine is cold again. Then if you still have a idle above 2000 rpm, it's either your "fast idle thermal valve" or it could be your ambient temp. What's the outside ambient air temp. when you have your high fast cold start idle? If you want to check your fast idle thermal valve, remove the air intake, and slowly start to close off the hole inside the throttle body. It's the bottom one of the side with two, you can open the cover for it and there will be a white plastic tube you can thread in, sometimes they get loose and fall out completely.
Thread
Thread Starter
Forum
Replies
Last Post
TearSDMF89dx
Honda CRX / EF Civic (1988 - 1991)
3
01-03-2012 04:31 AM