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06-02-2021, 11:44 AM | #26 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
🤣🤣🤣🤣🤪
I live in a country that temp @6:30 pm is close to 41c? State of Qatar However the truck is imported from USA either UT or CO? Among other trucks I own👍🏻 This truck have a loud clunk when in reverse, not sure why?
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1972 GMC Sierra C2500, V8-350 1986 GMC Sierra C2500, V8-454 1986 GMC Sierra C2500, V8-LS1 1986 GMC Sierra K2500, V8-350 1987 GMC Sierra R3500, V8-454 1997 GMC Sierra K2500, V8-454 |
06-02-2021, 12:09 PM | #27 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
A balmy 16C here this morning. Might get to 25C by end of day.
If you have a two piece driveshaft the clunk could be the centre bearing, or a bad u-joint. |
06-02-2021, 12:38 PM | #28 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
If you’re curious about my location!
I live in a little village by the sea! On the east coast of Vancouver Island. Province of British Columbia. About 80 km due west of Vancouver across the water. Very quiet here except for the sometimes fun of a big bird like this. Injured. Couldn’t fly. Eagle rescue caught her. They’ll fix her up and release her. The clunk you’re getting. Is your truck 4 wheel drive? |
06-02-2021, 01:19 PM | #29 | |
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Re: Rochester QuadraJet 4bbl Carburetor issue
Quote:
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1972 GMC Sierra C2500, V8-350 1986 GMC Sierra C2500, V8-454 1986 GMC Sierra C2500, V8-LS1 1986 GMC Sierra K2500, V8-350 1987 GMC Sierra R3500, V8-454 1997 GMC Sierra K2500, V8-454 |
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06-02-2021, 01:36 PM | #30 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
It’s one piece, I’ll have to check that
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1972 GMC Sierra C2500, V8-350 1986 GMC Sierra C2500, V8-454 1986 GMC Sierra C2500, V8-LS1 1986 GMC Sierra K2500, V8-350 1987 GMC Sierra R3500, V8-454 1997 GMC Sierra K2500, V8-454 |
06-02-2021, 02:24 PM | #31 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
Could be noise from transfer case.
And sometimes bad motor or trans mounts will make a clunk. |
06-03-2021, 10:46 AM | #32 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
If it only clunks in 4 wheel drive, suspect the X-fer case or forward drive train.
If it clunks in both 2 & 4 wheel drive, suspect the rear drive train. Possible that since your idle is fixed, the clunk will largely go away. Even a new drive train has enough slop that switching from D to R or back at high speed can make a noise. |
06-03-2021, 11:10 AM | #33 | |
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Re: Rochester QuadraJet 4bbl Carburetor issue
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06-04-2021, 02:23 PM | #34 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
Is the carb working better?
Does it start right up like you want? I’ve installed a torque strap a couple times to limit the motor from moving. Whenever put in gear the motor wants to torque to the passenger side. I used a short chain with a turnbuckle. Attached to the frame and a convenient bolt down beside the power steering pump. If the clunk goes away then you know something is hitting somewhere. If you try that don’t leave the strap in place. Your steering can be effected. |
06-04-2021, 04:03 PM | #35 | |
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Re: Rochester QuadraJet 4bbl Carburetor issue
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Im waiting for free time so I can diagnose it probably. Thank you and the other who helped me to fix the issue. 👋🏻. The only thing is where to fine a NOS or remanufactered carburetor that fits my truck. 🌺🌹🌷💐
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1972 GMC Sierra C2500, V8-350 1986 GMC Sierra C2500, V8-454 1986 GMC Sierra C2500, V8-LS1 1986 GMC Sierra K2500, V8-350 1987 GMC Sierra R3500, V8-454 1997 GMC Sierra K2500, V8-454 |
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06-04-2021, 07:08 PM | #36 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
Why are you looking for a nos one or reman carb?
Does your truck start normally now? You know. Pump it a couple times to set the choke, fire it up, it runs on a high idle, tap the throttle after a couple minutes, it idles down to normal, put it in gear and off you go. |
06-05-2021, 09:40 AM | #37 | |
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Re: Rochester QuadraJet 4bbl Carburetor issue
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I’ve other trucks, one requires a 800cfm carb, one requires 750cfm Thanks again
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1972 GMC Sierra C2500, V8-350 1986 GMC Sierra C2500, V8-454 1986 GMC Sierra C2500, V8-LS1 1986 GMC Sierra K2500, V8-350 1987 GMC Sierra R3500, V8-454 1997 GMC Sierra K2500, V8-454 |
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06-05-2021, 10:58 AM | #38 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
I’ve had two Sean Murphy quadrajets. A bit more in price but excellent parts.
And they can restore your original carb for you. Look around on here. https://www.smicarburetor.com/ |
06-05-2021, 12:37 PM | #39 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
Those electric choke mechanisms die after a while. That's probably all you need.
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06-06-2021, 12:56 PM | #40 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
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06-07-2021, 04:36 PM | #41 | |
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Re: Rochester QuadraJet 4bbl Carburetor issue
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What are these relays for? In the red box above the distributor
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1972 GMC Sierra C2500, V8-350 1986 GMC Sierra C2500, V8-454 1986 GMC Sierra C2500, V8-LS1 1986 GMC Sierra K2500, V8-350 1987 GMC Sierra R3500, V8-454 1997 GMC Sierra K2500, V8-454 |
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06-07-2021, 07:31 PM | #42 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
Maybe you should start a new thread with a better pic or two.
I don’t know but someone else might. |
06-08-2021, 12:13 PM | #43 | |
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Re: Rochester QuadraJet 4bbl Carburetor issue
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I’ll thanks 👋🏻
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1972 GMC Sierra C2500, V8-350 1986 GMC Sierra C2500, V8-454 1986 GMC Sierra C2500, V8-LS1 1986 GMC Sierra K2500, V8-350 1987 GMC Sierra R3500, V8-454 1997 GMC Sierra K2500, V8-454 |
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06-04-2024, 09:10 AM | #44 |
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Re: Rochester QuadraJet 4bbl Carburetor issue
saving this post, I am having the same issues.
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