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#1 |
Equal opportunity joke ofender
![]() Join Date: Oct 2011
Location: Eastern Shore of MD
Posts: 9,937
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fighting with engine to idle
1969 C10 with 307 2 barrel carb. new fuel pump new rubber hoses front and rear. Truck will start up but unless you keep it revving in the higher rpms it will shut off. Hit the accelerator a couple pumps and it will fire right back up but will not come close to idling. What should I be looking for at this point? I swapped the carb from my Blazer and it still does the same thing, but to be fair that carb has sat for a couple of years as well. I don't want to just go throwing parts at it if possible.
Thanks Richard
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Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type. |
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#2 |
Equal opportunity joke ofender
![]() Join Date: Oct 2011
Location: Eastern Shore of MD
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Re: fighting with engine to idle
And to be a little clearer, If I close the choke it will stay running but if I even barely open the choke it shuts right off.
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Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type. |
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#3 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,531
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Re: fighting with engine to idle
Vacuum leak.
Since you swapped carbs, I’d think it could be intake gasket. |
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#4 |
Equal opportunity joke ofender
![]() Join Date: Oct 2011
Location: Eastern Shore of MD
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Re: fighting with engine to idle
This motor was supposedly just put together by someone else for the PO so i suppose that could be a very real possibility that they did not get the gasket seated right. Are there any ways to tell for sure without pulling the intake?
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Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type. |
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#5 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,531
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Re: fighting with engine to idle
Could try spraying starter fluid at the intake ports. If the rpm increases you have the culprit.
Worst case is it’s on the bottom side of the port and won’t show up easily. Sometimes you can hear it inside a valve cover. Last edited by geezer#99; 06-14-2024 at 04:27 PM. |
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#6 |
Equal opportunity joke ofender
![]() Join Date: Oct 2011
Location: Eastern Shore of MD
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Re: fighting with engine to idle
I think I have it figured out but won't know for sure until my carb kit gets here from rock auto. The base of the carb I have on it now from the 72 motor, physically bolts up to the intake but is not the same perimeter as the 69 carb. I did not notice the hole being exposed on the right side for what I am assuming is heat riser for a choke. It gets hot enough I could not keep my finger there for long but it definitely has a bad vacuum loss. and it seems to want to run better the short time I had my finger on it. The 69 carb leaks from all the gaskets so I am ordering a rebuild kit from Rock Auto and pray I have the patience to rebuild it.
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Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type. |
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#7 |
Moderator
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Location: Cherryville, NC
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Re: fighting with engine to idle
Am I seeing a missing carb mount bolt ?
Check that stud mount hole does not go all the way through to the intake plenum. ![]() ![]() ![]() ![]()
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#8 | |
Equal opportunity joke ofender
![]() Join Date: Oct 2011
Location: Eastern Shore of MD
Posts: 9,937
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Re: fighting with engine to idle
Quote:
I will be putting the 69 carb back on once I rebuild it
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Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type. |
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#9 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,531
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Re: fighting with engine to idle
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