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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.
Posted via Mobile Device |
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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: 16,245
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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 R.I.P. FleetsidePaul |
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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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