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#1 |
Registered User
Join Date: Aug 2013
Location: Brownsboro, TX
Posts: 7
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Engine Hesitates and Dies
Bought a 68 C10 LWB with a 396. It ran a little rough when I got it and tried to tune the carb (old q-jet) and found that it had a large vacuum leak. The truck did run and drive ok though. I replaced the q-jet with a 1406 Edlebrock and got it tuned in good. Now when I drive it hesitates and dies when I accelerate. It does better if I punch the gas. When it is parked it idles great and I can hit the gas then (in park) and no problem. Any ideas?
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#2 |
Registered User
![]() Join Date: Dec 2012
Location: North Carolina
Posts: 4,989
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Re: Engine Hesitates and Dies
When I press my Pedal mine dies as well
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1971 GMC Sierra 1959 GMC 100 |
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#3 |
Registered User
Join Date: Aug 2013
Location: Brownsboro, TX
Posts: 7
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Re: Engine Hesitates and Dies
More info. When I adjusted the idle mixture I got the vacuum gauge to change (rpm change) when I went lean, but never got a change when I went rich. Gauge showed good vacuum all the way out. It also has an electric fuel pump. I is reading about 7 psi. Edlebrock states no more than 6. Not sure if that would cause the hesitation and death.
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#4 |
Registered User
![]() Join Date: Dec 2012
Location: North Carolina
Posts: 4,989
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Re: Engine Hesitates and Dies
How much does one of them Electric Fuel pumps run ?
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1971 GMC Sierra 1959 GMC 100 |
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#5 |
Registered User
Join Date: Jun 2009
Location: CENTRAL,NJ
Posts: 586
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Re: Engine Hesitates and Dies
How long has the gas been in the truck?
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#6 |
Registered User
Join Date: Aug 2013
Location: Brownsboro, TX
Posts: 7
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Re: Engine Hesitates and Dies
Not sure the cost of the pump. It was on the truck when I bought it. The gas is fresh. I actually ran it out of gas a few weeks ago while I was working on it. So I know the stuff in it now is good.
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#7 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: Engine Hesitates and Dies
Does it have the points style distributor?
Does the vacuum advance work? Have you checked the fuel filter? How old are the plug/coil wires? There are a lot of things that can cause the issue you relate.Give us a few more details and maybe we can better guide you.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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#8 |
Registered User
![]() Join Date: Dec 2012
Location: North Carolina
Posts: 4,989
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Re: Engine Hesitates and Dies
Question does a 1971 gmc have points and if so were would they be located ?
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1971 GMC Sierra 1959 GMC 100 |
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#9 |
Formerly- 1972SuperCheyenne
![]() Join Date: Oct 2008
Location: Wake Forest NC
Posts: 5,782
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Re: Engine Hesitates and Dies
It sure does buddy, the points are under the distributor cap. The cap is what the spark plug wires plug into behind the air cleaner.
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--Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with. |
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#10 |
Registered User
![]() Join Date: Dec 2012
Location: North Carolina
Posts: 4,989
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Re: Engine Hesitates and Dies
Thanks man, that could be a reason it isn't starting up correctly...Hmmm
__________________
1971 GMC Sierra 1959 GMC 100 |
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#11 |
Registered User
Join Date: Aug 2013
Location: Brownsboro, TX
Posts: 7
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Re: Engine Hesitates and Dies
It is a point style distributor and the vacuum advance works. The plugs and coil are fairly new. I have not changed either of the fuel filters.
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