Author Topic: 86 C2500 350 4bbl  (Read 15450 times)

Offline Cowman85

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Re: 86 C2500 350 4bbl
« Reply #30 on: March 03, 2009, 06:05:29 PM »
gee i hate being right (when its bad) she stalled in the school parking lot and will not start again.
fuel filter was removed, there is sufficient flow from the pump, it will only run when you put gas in the carb.
So looks like the carb after all, and i dont know enough to fix this.
I do not have the tools or space to pull the carb off and clean/rebuild it, kinda iffy about pulling one out of the wreckers cause look at my luck an 86 with 153km and the quadra jet is crapped out.
Is it worth buying a new one (that is pretuned i hope) or should i just roll the dice with a used one?
86 C20 350/TH400 LWB
80 C2500 350/Muncie SM465 *gone to heaven* LWB
98 Malibu 3.1 V6
86 S10 L99/4L60E

Offline Captkaos

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Re: 86 C2500 350 4bbl
« Reply #31 on: March 03, 2009, 06:12:29 PM »
I bought a new one from Autozone when I wanted a new one, came with a warranty.

Offline choptop

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Re: 86 C2500 350 4bbl
« Reply #32 on: March 03, 2009, 07:50:18 PM »
You sadu you removed the filter in the carb. Did you put the inline filter in first and run it?
76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab

Offline Cowman85

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Re: 86 C2500 350 4bbl
« Reply #33 on: March 03, 2009, 08:35:22 PM »
not yet, but i have the lines sitting in the middle of a clean jerry can thats sealed at the top.
86 C20 350/TH400 LWB
80 C2500 350/Muncie SM465 *gone to heaven* LWB
98 Malibu 3.1 V6
86 S10 L99/4L60E

Offline choptop

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Re: 86 C2500 350 4bbl
« Reply #34 on: March 03, 2009, 09:34:58 PM »
That may have been what caused the final failure. If any trash was left in the line, it would now be stopping up the needle and seat in the carb. You may be able to remove the filter housing on the carb, and lightly ( ever so lightly) bolw air back through the vent and dislodge anything that may be stuck in the seat. Use extreme caution and protect your eyes and face. It seems tho that your carb is just one of the many problems with it that need fixing anyway. Always have a filter on your fuel line. I did remove the filter in my carb, after I installed the inline filter before the pump and ran it a while before I removed the carb filter to finish cleaning out the fuel line. I am sorry if I didnt clarify this.A little peice of rubber from the new hose can cause the needle and seat on the fuel inlet to stick open and flood the engine.
76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab

Offline Cowman85

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Re: 86 C2500 350 4bbl
« Reply #35 on: March 03, 2009, 10:01:03 PM »
The truck always had a clean fuel filter before and after the line change, until this afternoon when it wouldnt run unless you dump gas in the carb, thats when i removed the filter to see if there was anything in there. There was a metal ring that used to be in there, maybe a small piece of that was behind the filter in the first place??
 I will definitely try clearing it, it wouldnt surprise me if a kitchen sink came tumbling out now.
Will be picking up a quadra jet book tomorrow and going over the trouble shooting in that as well, if she aint fixed by the end of the week i think i will just buy a performance carb and wait to rebuild this one when i have the means to do so. An inline fuel filter will be bought tomorrow before any more gas gets pumped through there.
86 C20 350/TH400 LWB
80 C2500 350/Muncie SM465 *gone to heaven* LWB
98 Malibu 3.1 V6
86 S10 L99/4L60E

Offline Captkaos

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Re: 86 C2500 350 4bbl
« Reply #36 on: March 04, 2009, 02:26:56 PM »
Get a gallon of Chem-Dip and a $30 rebuild kit, take pics when you take it apart and rebuilt it.  The are REALLY simple.

Offline choptop

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Re: 86 C2500 350 4bbl
« Reply #37 on: March 04, 2009, 03:12:55 PM »
Captkaos ir right. They really arent as hard to rebuild as they look. Key thing is to take lots of pictures, even if you have a book, and clean everything real well. The hardest part may be getting the float set, but most carb kits come with a measuring tool, and good instructions. Cleanliness is the main thing. You can take it apart and let is soak in the carb cleaner while it sits in the back of your truck. Weather permitting of course.
76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab

Offline Cowman85

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Re: 86 C2500 350 4bbl
« Reply #38 on: March 04, 2009, 06:03:41 PM »
i know what i need and what to do, but i drive my truck everyday so it is not feasible to store in the back of my truck and i dont have a second carb yet either. Im not intimidated by it, i just want to be prepared.

You guys ready for a good laugh???
i tracked down an auto advisor at nait today and told him the situation, he also thought it was the float so i asked how to mess with it without taking the carb off. He said to gently poke something down there to nudge the float, i thanked him and went on my way.
I ended up using a friggin zip tie to fix the problem, after poking it 3 times it fired up as if it was new!

I would just like to say i have all the respect in the world for these older guys who are willing to pass on their knowledge
86 C20 350/TH400 LWB
80 C2500 350/Muncie SM465 *gone to heaven* LWB
98 Malibu 3.1 V6
86 S10 L99/4L60E

Offline Cowman85

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Re: 86 C2500 350 4bbl
« Reply #39 on: March 04, 2009, 06:04:27 PM »
thanks for the help though guys  :)
86 C20 350/TH400 LWB
80 C2500 350/Muncie SM465 *gone to heaven* LWB
98 Malibu 3.1 V6
86 S10 L99/4L60E

Offline Stowburb

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Re: 86 C2500 350 4bbl
« Reply #40 on: March 11, 2009, 03:21:34 PM »
I have an '88 r-20 burb with a tbi 7.4l and a "compushift" 4l80e trans. it has a 4.10 gear and it kicks ass! great fuel mileage on the hwy ( i think around 14-15, and i can pull a 7X14 tandem trailer at 70 mph. in overdrive like it's nothing!
 Compushift has a kit (trans, wiring harness, and controller) but it's not cheap! The trans they build are bullet proof, tho! All billit parts and they have severial different one's for differnt needs. Check em out...http://www.phoenixtrans.com/html/gmtrans.html.
 Hope that helps,....i love my set up. works great.

Offline Cowman85

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Re: 86 C2500 350 4bbl
« Reply #41 on: March 11, 2009, 11:41:57 PM »
Wow, that is a nice setup! once i'm done school i will be able to afford some of the things i've been craving to put in.
i'll be sure to check that out too, i really miss my muncie 4 spd though, this th400 aint the same.
86 C20 350/TH400 LWB
80 C2500 350/Muncie SM465 *gone to heaven* LWB
98 Malibu 3.1 V6
86 S10 L99/4L60E