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#26 |
Registered User
Join Date: Apr 2015
Location: Shenandoah Valley, Virginia
Posts: 332
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Re: 3rd gear bogging
Now that you say that, about the gas cap... The man I bought the truck from painted the entire truck and while doing so painted the gas cap, when I would have a full tank of gas it would leak out the back side like pyshically inside the wheel well, but coming from the cap. I bought a new acdelco cap and when I get gas at a gas station, I'll loosen the cap and psshhhhhhh for 4-5 seconds the pressure is released. Dang.... If it weren't after midnight I'd go run it with the cap off and see if that changes it. It's so weird thigh because I've had the gas cap for months & the truck ran amazing after the rebuild then surprise the unknown happens. Hey thanks guys, I appreciate all the help. Going to update tomorrow
Should I have a vented cap?
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85' GMC Sierra Classic Built 350; Weiand intake, Holley 600, Thumpr Cam Built 350 turbo with shift kit & 2500 Stall Thumpin' away |
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#27 |
Registered User
Join Date: Apr 2014
Location: Bloomington Indiana
Posts: 1,041
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Re: 3rd gear bogging
It got cold enough for the gas to shrink enough to create enough vacuum....
Like I said, just run a 1/16th-inch drill through the center of the cap. That's all I did. On both caps. Five years ago now. No problems.
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Rich Weyand 1978 K10 RCSB DD. |
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#28 |
Registered User
Join Date: Apr 2014
Location: Bloomington Indiana
Posts: 1,041
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Re: 3rd gear bogging
Hey, SkinnyG: Nice catch! Sounds like you got it. Forgot all about that. It's been five years since I vented my caps.
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Rich Weyand 1978 K10 RCSB DD. |
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#29 |
Registered User
Join Date: Apr 2015
Location: Shenandoah Valley, Virginia
Posts: 332
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Re: 3rd gear bogging
I'm going to test this tomorrow. Glad you guys pointed this out. Wish I had the joy of 2 tanks. My engine sure sucks the gas, sometimes I swear I can see the needle moving down. BUT I enjoy my square more than my 08 Cadillac SRX. Love them both but there's something about a square!
Still can't wrap my head around why it only acts up once third gear hits
__________________
85' GMC Sierra Classic Built 350; Weiand intake, Holley 600, Thumpr Cam Built 350 turbo with shift kit & 2500 Stall Thumpin' away |
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#30 | |
Registered User
Join Date: Apr 2014
Location: Bloomington Indiana
Posts: 1,041
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Re: 3rd gear bogging
Quote:
And I agree with you: Ain't nothin' like a squarebody.
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Rich Weyand 1978 K10 RCSB DD. |
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#31 |
Registered User
Join Date: Apr 2015
Location: Shenandoah Valley, Virginia
Posts: 332
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Re: 3rd gear bogging
Will update in the morning good sir, thanks for the tips.
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85' GMC Sierra Classic Built 350; Weiand intake, Holley 600, Thumpr Cam Built 350 turbo with shift kit & 2500 Stall Thumpin' away |
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#32 |
Registered User
Join Date: Apr 2015
Location: Shenandoah Valley, Virginia
Posts: 332
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Re: 3rd gear bogging
Thank you BOTH for mentioning the gas cap! It was acting up with 3/4 tank of gas, took the cap off and drove and it ran fine! I put a vent hole in the cap so we'll see how it goes. I can't thank you guys enough for the help. Finally I can enjoy my truck as much as I'd like to! Hope this fixes it permanently. Again, kudos guys.
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85' GMC Sierra Classic Built 350; Weiand intake, Holley 600, Thumpr Cam Built 350 turbo with shift kit & 2500 Stall Thumpin' away |
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#33 |
Registered User
Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,227
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Re: 3rd gear bogging
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1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, boosted-LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate |
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