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02-27-2013, 03:42 PM
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#1 |
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Registered User
Join Date: Feb 2013
Location: Knoxville tn
Posts: 28
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Loses power when downshifts
Got a 70 c10 With a v8 and an automatic tranny with a new quadrajet and new plugs and wires. Truck runs great until you start climbing a long hill. As soon as I press tge gas to compensate for the lose of speed the truck will downshift but gains no power or speed. In fact the more I let off the gas the more it will accelerate until it up shifts again just to start the process all over again.
Any ideas? Thanks Biscuit Posted via Mobile Device |
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02-27-2013, 03:52 PM
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#2 |
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Registered User
 Join Date: Dec 2012
Location: sparta tennessee
Posts: 345
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Re: Loses power when downshifts
sounds like a clogged exaust
__________________
1946 car hauler 1948 surburban 1937 chevy sedan 1940 olds sedan (project) 1967 ss396 chevelle 1999 dually crewcab(24000 miles) |
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02-27-2013, 04:22 PM
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#3 |
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Registered User
Join Date: Feb 2013
Location: Knoxville tn
Posts: 28
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Re: Loses power when downshifts
Hmm the exhaust seems to flow freely. Strong acceleration in lower gears when starting out but falls on its face when I'm going uphill and downshift.
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02-27-2013, 04:33 PM
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#4 |
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Proprietor of Dale's Corner
Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,009
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Re: Loses power when downshifts
Sounds like it might be a lean condition. What happens on level ground with quad open.. does it bog? If it does might be float set low.
__________________
"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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02-27-2013, 06:39 PM
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#5 |
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Registered User
Join Date: Feb 2013
Location: Knoxville tn
Posts: 28
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Re: Loses power when downshifts
Seems to run strong on flat ground. Pulls real hard in second. Seems slow to downshift alot though.
Posted via Mobile Device |
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02-27-2013, 08:48 PM
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#6 |
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Registered User
Join Date: May 2011
Location: mich
Posts: 655
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Re: Loses power when downshifts
according to your statement it sounds lean as if the metering rods are stuck.
sometimes the power piston sticks on the quads. |
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02-27-2013, 09:11 PM
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#7 |
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Registered User
Join Date: Dec 2008
Location: NW-Ohio
Posts: 2,525
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Re: Loses power when downshifts
id pull the top plate n check the floats [n other stuff], and install a set of brass floats from napa while your in there. [fyi GM made it so you can do that without removing the whole carb]
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