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10-23-2006, 12:20 AM | #1 |
Registered User
Join Date: Sep 2006
Location: Oak Harbor , Wa
Posts: 27
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hesitation during acceleration
ive got a 70 c-10 with a 350. i had a edelbrock carb on the stock manifold and yesterday i installed a performer intake as well. after messing w/ timing and everything ive got a bad flat spot. idle is good but right off idle it just falls on its face. when i installed the distributor i mixed the two black wires on the coil. i dont know if maybe i fried something or what. truck ran great before i put on the new manifold.
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10-23-2006, 03:02 PM | #2 |
Registered User
Join Date: Sep 2006
Location: Oak Harbor , Wa
Posts: 27
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Re: hesitaion during acceleration
bump
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10-24-2006, 09:21 PM | #3 |
Mejor Que Nada
Join Date: Jun 2006
Location: texas
Posts: 232
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Re: hesitaion during acceleration
sounds like a timing issue to me..
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10-24-2006, 10:21 PM | #4 |
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Join Date: Sep 2006
Location: League City, Texas
Posts: 732
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Re: hesitaion during acceleration
Is the carburetor new or used? Usually this is a lean condition, such as a bad accelerator pump. Retarded ign timing from stock could cause a flat spot or weak off idle acceleration. Sometimes a weak accell pump can be partially masked by a little more timing advance too.
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10-24-2006, 11:39 PM | #5 |
Registered User
Join Date: Sep 2006
Location: Oak Harbor , Wa
Posts: 27
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Re: hesitation during acceleration
brand new carb. i advanced the timing way off the scale and the flat spot went away. still pings when i get on it. should i advance it more??
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10-25-2006, 09:34 AM | #6 |
Registered User
Join Date: Sep 2006
Location: League City, Texas
Posts: 732
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Re: hesitation during acceleration
I would back off the timing until the pinging stops. The pinging or pre-ingnition is not good for your engine. If the flat spot comes back try just riching up your idle mixture screws a little and see if that helps. Listen to your engine idle when you do this, it will tell you where it likes it. Hopefully as you richin it up your idle will smooth out some meanig that it was too lean before.
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10-25-2006, 12:41 PM | #7 |
Black 72 Chevy
Join Date: May 2002
Location: Los Angeles, California
Posts: 662
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Re: hesitation during acceleration
Orange C-10, check these videos from Edelbrock.
http://www.edelbrock.com/automotive_...ech_vids.shtml |
10-25-2006, 01:09 PM | #8 |
Msgt USAF Ret
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,718
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Re: hesitation during acceleration
Sounds to me like when you pulled the intake and the distributor you put the distributor back in about one tooth off. Check this by putting the timing mark on the balancer on the zero mark on the timing tab and pull the cap off the distributor and see if the rotor button lines up exactly with either no.1 or no.6 spark plug wire. If it doesn't then pull the distributor up just enough to align it. If you wired the coil in reverse polarity it will do exactly as you describe also.
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10-25-2006, 01:43 PM | #9 |
blood type; Retumbo
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
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Re: hesitation during acceleration
"2 black wires on coil" tells me it is a points setup. polarity is important. the "-" side of coil goes to dist. while the "+" side goes to ign. switch and starter.
when is the last time you set your dwell? IIRC it calls for 28-32* dwell at warm idle. hope this helps Last edited by 68C15; 10-25-2006 at 01:44 PM. |
10-25-2006, 08:33 PM | #10 |
Registered User
Join Date: Sep 2006
Location: Oak Harbor , Wa
Posts: 27
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Re: hesitation during acceleration
deleted the points with one of those accel kits. the coil is wired properly. im going to turn the motor to the 0 mark and check the distributor. maybe i did get it off a little
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