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03-29-2015, 07:11 PM | #1 |
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80 c30 went from no start to full throttle
Was needing to just move a trailer with my truck and spent 2 days on it and finally it starts and goes straight to full throttle and all the butterfly valves are nearly closed the only way to throttle it down is to use the choke. Need some help here guys cause I'm scratching my head here.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-29-2015, 07:17 PM | #2 |
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Re: 80 c30 went from no start to full throttle
Idle screws set wrong?
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03-29-2015, 07:26 PM | #3 |
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Re: 80 c30 went from no start to full throttle
It ran previous to this encounter.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-29-2015, 08:39 PM | #4 |
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Re: 80 c30 went from no start to full throttle
What kind of carb you have on it?
Edit: wait just saw your signature that this truck is a diesel? |
03-29-2015, 08:46 PM | #5 |
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Re: 80 c30 went from no start to full throttle
if its diesel there are no butterflys there.
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03-29-2015, 09:56 PM | #6 |
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Re: 80 c30 went from no start to full throttle
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03-29-2015, 09:58 PM | #7 |
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Re: 80 c30 went from no start to full throttle
Not a diesel yet. Carb is a quadrajet.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-29-2015, 10:02 PM | #8 |
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Re: 80 c30 went from no start to full throttle
The only thing that I changed was get the rear two butterfly valves unstuck.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-29-2015, 10:17 PM | #9 |
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Re: 80 c30 went from no start to full throttle
Did you have the carb off ? Are the secondary butterflies catching on the base gasket ? Any vacuum hoses disconnected or split / cracked ?
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03-29-2015, 10:43 PM | #10 |
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Re: 80 c30 went from no start to full throttle
No I don't have the carb off. No the valves are not catching. Almost new hoses.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-30-2015, 06:45 AM | #11 |
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Re: 80 c30 went from no start to full throttle
It still sounds like the secondaries are sticking open to me. I have had it happen to me several times when the carb has been sitting for a couple years.
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03-30-2015, 08:59 AM | #12 |
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Re: 80 c30 went from no start to full throttle
What should I do to fix it.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-30-2015, 10:10 AM | #13 |
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Re: 80 c30 went from no start to full throttle
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03-30-2015, 11:50 AM | #14 |
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Re: 80 c30 went from no start to full throttle
Here you go.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-30-2015, 12:03 PM | #15 |
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Re: 80 c30 went from no start to full throttle
A bit closer on both sides would help!
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03-30-2015, 01:41 PM | #16 |
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Re: 80 c30 went from no start to full throttle
That carb looks WORE OUT. I thought my old one was bad.
Probably would not hurt to rebuild this one. |
03-30-2015, 02:54 PM | #17 |
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Re: 80 c30 went from no start to full throttle
can you see the butterflies after it starts?
any spring tension to hold the secondaries closed?
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03-30-2015, 05:16 PM | #18 |
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Re: 80 c30 went from no start to full throttle
My dad says that we're going to rebuild it.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-30-2015, 05:36 PM | #19 |
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Re: 80 c30 went from no start to full throttle
Where should I buy a rebuild kit.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-30-2015, 06:05 PM | #20 |
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Re: 80 c30 went from no start to full throttle
Here's some better pics.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-30-2015, 06:09 PM | #21 |
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Re: 80 c30 went from no start to full throttle
...
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-30-2015, 06:13 PM | #22 |
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Re: 80 c30 went from no start to full throttle
,,,
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-30-2015, 06:48 PM | #23 |
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Re: 80 c30 went from no start to full throttle
Where's your secondary air valve dampner rod?
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03-30-2015, 07:42 PM | #24 |
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Re: 80 c30 went from no start to full throttle
It's gone truck came that way.
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1980 chevy c30 6.2L diesel swap here's the build thread http://67-72chevytrucks.com/vboard/s...=1#post7161431 1995 chevy c3500 6.5L diesel 1997 land rover disco I 6.2L diesel swap, MPG rumored at 26-28
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03-30-2015, 07:51 PM | #25 |
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Re: 80 c30 went from no start to full throttle
Does it still rev to the moon when you start it?
Have you turned down the high idle? Here's a link on rebuilding your carb. http://www.vetteprojects.com/kstyer/quadrajet.htm |
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