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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#17160 01/03/2002 7:11 AM | Joined: Jan 2002 Posts: 45 Member | | Member Joined: Jan 2002 Posts: 45 | Hi...i have a 87 3/4 ton chevy van with stock 350 fuel injected...air just like a van conversion. The problem is that i recently change the radiator as the old one was leaking.
However since the change the idle on a cold start...races or runs too high in rpms.
Nothing was done except to change the old radiator and even with the slow leak i had no idle problems.
Have to smog the truck this month...so any suggestions as to what is causing the idle to run so fast is appreciated. Note that after the engine is warmed up the idle slows down to normal operating speed.
The radiator is a heavy duty three core or row one that i got from Napa auto store.
Thanks Starrider | | |
#17161 01/03/2002 1:19 PM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | Is it the same size as the original radiator?
Did you change the thermostat?
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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#17162 01/03/2002 8:10 PM | Joined: Jan 2002 Posts: 45 Member | | Member Joined: Jan 2002 Posts: 45 | Mechainiac...I think it is the same size but it may have a high cooling rating and no i did not changed the thermostate...as a cold engine is a cold engine and the fast idle should idle should idle at the same speed as before...?
Thanks for your response
Starrider
[ 01-03-2002: Message edited by: starrider88 ] | | |
#17163 01/03/2002 11:02 PM | Joined: Nov 2001 Posts: 16 Member | | Member Joined: Nov 2001 Posts: 16 | Hi Sounds like there is a sensor that came unpluged or the temperature sensor for the ECM has gone out of specs. Check the air induction system to see if the sensor there is unhooked. Also, does the check eng light come on? Hope this helps.....Chb46 | | |
#17164 01/04/2002 2:10 AM | Joined: Feb 2000 Posts: 132 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2000 Posts: 132 | could be just coincidence too.
check the throttle body base gasket for being sucked in.
they do it all the time.....
i miss obscene phone calls...
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#17165 01/04/2002 3:39 AM | Joined: Jan 2002 Posts: 45 Member | | Member Joined: Jan 2002 Posts: 45 | Thanks guys!!! Will check those items.
Starrider | | |
#17166 01/04/2002 5:27 AM | Joined: Sep 2001 Posts: 109 Member | | Member Joined: Sep 2001 Posts: 109 | Make sure all air is burped out...... air at the CTS will cause a fast idle. Also, any hoses knocked loose?????? VAcuum leaks cause high idles too.
John Kennedy
1950 Suburban street rod
Pics in the Gallery.......
new site up!
http://home.joimail.com/~kennedyjp/
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