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02-25-2003, 01:05 PM | #1 |
Registered User
Join Date: Oct 2002
Location: Manchester, TN
Posts: 217
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Engine Problem Help!! '80
I've got a problem and I'm not sure what to check next! My '80 4x4 has a 350 w/auto trans that starts fine, idles fine, runs fine till it shifts into 3rd, then the engine really boggs down. I took it to my trusted mechanic who said it was the tranny. Well $2000 later and a rebuilt tranny it still no better. But now when I accelerate above 40 mph or go up hill the engine sputters and revs (like a clogged fuel filter). I've changed the fuel filter, checked all the plugs and wires. I'm thinking I need to rebuild the carb but I'm not sure thats my problem. Any ideas are appreciated. Thanks, Mike
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'71 Cheyenne Super '80 Custom Deluxe '75 Blazer |
02-25-2003, 01:09 PM | #2 |
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Join Date: Feb 2003
Location: Bremerton, WA
Posts: 86
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You mentioned it "sputters and revs". If it is revving up under load then something is definitely slipping somewhere...could still be your transmission.
Give us more info!
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'72 GMC C20, "2500 Super Custom", Custom Camper, New 454 '93 K2500 Suburban, Old 454 (157K) |
02-25-2003, 02:09 PM | #3 |
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Join Date: Oct 2002
Location: Parksville, B.C. Canada
Posts: 637
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Could possibly be a bad fuel pump(check pressure) or ignition timing out/not advancing probably something simple. Too bad about replacing your trans. I would suggest you consider getting another "mechanic" that knows how to troubleshoot problems, I think you would always check the simple things first.
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1969 G.M.C 3/4 Ton 920 (Canadian Version) 307 3 speed, currently apart 1998 Chevy 1/2 ton ex cab V-6 5 speed 1967 Chevy SWB - project truck; not started just yet |
02-25-2003, 03:03 PM | #4 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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If your fuel pump is good, check your in tank pick up filter. From what you are describing, it sounds like it is short on fuel.
Jim |
02-25-2003, 04:03 PM | #5 |
More hobbies than money!
Join Date: Jan 2002
Location: Raleigh, nc, usa
Posts: 655
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had an '80 a while back, sounded about the same. it was the fuel pump.
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'70 cst10/swb 350, 3 on the tree, factory buckets. '70 GMC lwb 350/350 ps,pb '72 c-10 lwb 350/350 a/c, ps, pb '72 Blazer project |
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