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10-23-2011, 11:51 PM
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#1 |
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Registered User
Join Date: Oct 2011
Location: Matthews, NC
Posts: 129
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High Idle.
I started my truck today after not starting it for around 1 month, and while in park it was idling very high, but dramatically reduced when put in drive, could not starting it in a while have caused this? I gave it some gas and i believe it slowed down a good bit, so is this something i should be concerned about?
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10-24-2011, 12:00 AM
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#2 | |
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Registered User
Join Date: Mar 2009
Location: TN
Posts: 410
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Re: High Idle.
Quote:
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'69 Dodge Charger R/T 440, 727, 3.55 Sure Grip '68 Plymouth Road Runner 383, 727, 3.23 Sure Grip '89 Dodge Diplomat ex cop car 408, 727, 3.55 Sure Grip '77 Dodge Monaco ex cop car 440, 727, 2.71 '79 Dodge 'Lil Red Express pickup 360, 727, 3.55 Sure Grip '12 Dodge Challenger SRT8 392, M6, 3.92 '85 Chevrolet C-10 SWB 2wd 305, TH350, 2.73 |
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10-24-2011, 12:02 AM
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#3 |
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Registered User
Join Date: Sep 2010
Location: Kingston, PA
Posts: 394
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Re: High Idle.
Is it tbi or carb? If its tbi and it only does it when you first started it its normal, especialy if its cold out. If you let it run for a little does slow back down?
__________________
 87 GMC Sierra 2500 4x4 350/TH350/NP203 Flow Tech long tube headers, throttle body spacer, Edelbrock Performer cam, true dual Flowmaster 40s, 6 inch Superlift suspension lift 2000 silverado extended cab stepside 5.3l. Stock for now |
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10-24-2011, 12:07 AM
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#4 |
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Registered User
Join Date: Oct 2011
Location: Matthews, NC
Posts: 129
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Re: High Idle.
its carb, and it only idles high in park, slows down in every other gear, and after i gave it gas some in park it slowed down a bit.
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10-24-2011, 12:15 AM
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#5 |
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Registered User
Join Date: Sep 2010
Location: Kingston, PA
Posts: 394
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Re: High Idle.
Did it do it before it sat for a month? Higher idle in park is normal. Is it running rich?
__________________
87 GMC Sierra 2500 4x4 350/TH350/NP203 Flow Tech long tube headers, throttle body spacer, Edelbrock Performer cam, true dual Flowmaster 40s, 6 inch Superlift suspension lift 2000 silverado extended cab stepside 5.3l. Stock for now |
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10-24-2011, 12:16 AM
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#6 |
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6.0 powered square
Join Date: Feb 2008
Location: Mesquite texas
Posts: 3,459
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Re: High Idle.
does it Idle high only on cold start ups or all the time
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Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326 |
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10-24-2011, 12:25 AM
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#7 |
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Registered User
Join Date: Oct 2011
Location: Matthews, NC
Posts: 129
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Re: High Idle.
No it didnt do it before it sat i dont think, and yeah as the engine warms up or i give it gas, the idle gets a little quieter.
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10-24-2011, 09:10 PM
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#8 |
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Registered User
Join Date: Jun 2011
Location: Atlanta ga
Posts: 150
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Re: High Idle.
Sounds like your fast idle cam is working just fine.
That's normal behavior with a carb. Upon starting up, the fast idle cam bumps up the idle (1800 to 2000 rpm) until the choke has done it's job (then idle drops to spec on the engine sticker). There might be a chance that your choke pull off is no longer working in spec. It's vacuum operated, so make sure that all of your vacuum lines are in good shape.
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1984 C20, 454, 4 speed named "Gold Member" |
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10-24-2011, 09:33 PM
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#9 |
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Registered User
Join Date: Oct 2011
Location: Matthews, NC
Posts: 129
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Re: High Idle.
Okay, will do, thanks to all.
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10-25-2011, 12:44 PM
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#10 |
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Registered User
Join Date: Jul 2008
Location: sayreville nj
Posts: 1,072
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Re: High Idle.
to not start new thread, ill ask here.
i had the same issue, which i new was normal. but seemed too high for my liking, this past weekend i tuned the truck up. and then messed with carb a bit.....not sure what i did, turned 2 screws a bit.... now, truck starts right up. but quiet as can be, lost the choke action. just starts and stays around 600 should i turn it again, and try to get the choke action back?? 305. think im burning too much gas. or wasting i should say. 3 trips from sayreville to metuchon and empty. |
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