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Author Topic: power lost and sputtering at hyway speed  (Read 6132 times)

Offline 87454westernhauler

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power lost and sputtering at hyway speed
« on: January 03, 2012, 08:27:49 pm »
today i drove my 85 c20 350sbc 280 mile to Nebraska for school. about 100 miles into the trip right after i fueled up it started to sputter and not have any power to pull itself any faster than 55mph or before it would spazz if u tried to accelerate any. i am wondering if it might of just bean bad gas but have a feeling it is probably something else. i am kind of puzzled on this thing.
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86 c10 350 sbc 700R4 Daily Driver
79 gmc c20 350 th350
78 k1500 4x4 350 th350

Offline bd

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Re: power lost and sputtering at hyway speed
« Reply #1 on: January 03, 2012, 11:25:53 pm »
It sure is coincidental that you noticed it right after fueling.  You may have pumped dirty or contaminated fuel.  Check your fuel filter.  Is there any chance you got diesel?
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It's difficult to know just how much you don't know until you know it.
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Offline firefighter

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Re: power lost and sputtering at hyway speed
« Reply #2 on: January 04, 2012, 05:06:14 am »
I also agree with bd, check the fuel filter.

All this happening just after fill up raises a big red flag.
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Offline 1978 454 Big 10

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Re: power lost and sputtering at hyway speed
« Reply #3 on: January 04, 2012, 05:19:38 am »
Add a can of HEET. Might have had some water in the fuel.

http://www.goldeagle.com/brands/heet/products.aspx
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1978 Chevy C-10 Silverado "Big 10" 454, 400 turbo, PW, PDL, Tilt, Cruise, AM/FM, Factory Tach, Dual Tanks, Locking Diff, Sliding Rear Window, Trans Cooler, Cordova Brown/Santa Fe Tan. 052,600 Original miles!

Offline 87454westernhauler

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Re: power lost and sputtering at hyway speed
« Reply #4 on: January 04, 2012, 08:25:33 pm »
i did get it at a new caseys station where the diesel and gas fills are on the same hose and it started to do it about 20 or thirty miles after fueling. did drive it some today and it acts like it is dieseling or running on half of the cylinders when u try to accel past 30mph. but i did get all new filters today and napas version of heat! probably be the weekend before i have time to mess with it again and install filters. i am wondering if it could posibly be a bad dist. cap and rotor but ill check that saturday.
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86 c10 350 sbc 700R4 Daily Driver
79 gmc c20 350 th350
78 k1500 4x4 350 th350

Offline 87454westernhauler

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Re: power lost and sputtering at hyway speed
« Reply #5 on: January 04, 2012, 10:07:32 pm »
if i did get diesel in it, would it have messed up other components?
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86 c10 350 sbc 700R4 Daily Driver
79 gmc c20 350 th350
78 k1500 4x4 350 th350

Offline 1978 454 Big 10

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Re: power lost and sputtering at hyway speed
« Reply #6 on: January 05, 2012, 06:38:59 am »
Quote from: 87454westernhauler on January 04, 2012, 10:07:32 pm
if i did get diesel in it, would it have messed up other components?

Nope!

Diesel would just make it smoke a lot and run poorly, I still think it's water/trash!

Putting large amount of gas in a diesel is a different story.
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1978 Chevy C-10 Silverado "Big 10" 454, 400 turbo, PW, PDL, Tilt, Cruise, AM/FM, Factory Tach, Dual Tanks, Locking Diff, Sliding Rear Window, Trans Cooler, Cordova Brown/Santa Fe Tan. 052,600 Original miles!

Offline 87454westernhauler

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Re: power lost and sputtering at hyway speed
« Reply #7 on: January 05, 2012, 12:36:43 pm »
i did notice yesterday it was blowing lot more smoke than usuall! but ill switch filters and wait and see! ;)
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86 c10 350 sbc 700R4 Daily Driver
79 gmc c20 350 th350
78 k1500 4x4 350 th350

Offline 1978 454 Big 10

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Re: power lost and sputtering at hyway speed
« Reply #8 on: January 05, 2012, 01:31:59 pm »
Quote from: 87454westernhauler on January 05, 2012, 12:36:43 pm
i did notice yesterday it was blowing lot more smoke than usuall! but ill switch filters and wait and see! ;)

Fill it full with good (high octane) gas.

About the only things that could be damaged is the catalytic converter or oxygen sensor, if you have one.
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1978 Chevy C-10 Silverado "Big 10" 454, 400 turbo, PW, PDL, Tilt, Cruise, AM/FM, Factory Tach, Dual Tanks, Locking Diff, Sliding Rear Window, Trans Cooler, Cordova Brown/Santa Fe Tan. 052,600 Original miles!

Offline 87454westernhauler

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Re: power lost and sputtering at hyway speed
« Reply #9 on: January 05, 2012, 05:26:05 pm »
solved the problem! replaced al of the fuel filters and is runing fairly good but still isnt perfect! probly going to try and do a tune up at some point in time exspecialy since i get a very good discount on parts at the napa store!
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86 c10 350 sbc 700R4 Daily Driver
79 gmc c20 350 th350
78 k1500 4x4 350 th350
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