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#1 |
Registered User
Join Date: Jan 2013
Location: Las Vegas,NV
Posts: 59
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I have a 1968 C10 with a 350 engine. Lately when I turn the pick up off the engine clears its throat. Is this bad for the engine? How do I solve this?
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#2 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Problems when Shutting off engine Pick up
Is it like a sigh of relief and then a cough? It could be carbon buildup. I had one that started like that and then after a while it kept running or dieseling.
Causes can be due to bad or cheap "stop and go" fuel, timing problems or even overheating. If it's not timing or overheating, start by using fuel from the big companies like Shell, Exxon, Chevron, etc. Buy a couple of cans of gas treatment. I used Chevron but some others like Seafoam. Pour them into a full tank. You may have to do that at least two maybe three times. Some others use the old pouring gas treatment down the carb throat, but living in town, I couldn't do that.
__________________
68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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#3 |
Registered User
Join Date: Jan 2013
Location: Las Vegas,NV
Posts: 59
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Re: Problems when Shutting off engine Pick up
68gmsee
When I turn the key off, the engine gargles and then clears its thoat loud. I will try to stick with one grade of fuel. I like to use 91 from costco b/c it's the cheapest 91 in town but I sometimes put 87 from shell and 87 from chevron. I'll try just putting 91 and the gas treatment. I have noticed that it happens after it is warm but my engine doesn't exceed 190 degres. |
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#4 |
Registered User
Join Date: Jan 2013
Location: Las Vegas,NV
Posts: 59
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Re: Problems when Shutting off engine Pick up
68gmsee
When I turn the key off, the engine gargles and then clears its thoat loud. I will try to stick with one grade of fuel. I like to use 91 from costco b/c it's the cheapest 91 in town but I sometimes put 87 from shell and 87 from chevron. I'll try just putting 91 and the gas treatment. I have noticed that it happens after it is warm but my engine doesn't exceed 190 degres. |
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#5 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,143
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Re: Problems when Shutting off engine Pick up
Your idle is to high.
Posted via Mobile Device
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#6 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,004
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Re: Problems when Shutting off engine Pick up
Clean your spark plugs, could be carbon build up causing it to diesel. Idle could also be set too high.
__________________
1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#7 | |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
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