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O/T 85' Chevy S-10 with 2.8 carburated

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Steve Crum

02-17-2007 14:25:40




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Here's one for the experts, Bad Brad was cruising home last night in his 85' S-10 Blazer and it lost power like it was running out of gas. Let off the throttle and it idled good, try to go with it and it would die out again. We went over to where he left it this morning and put a new fuel filter in it and it ran good full speed ahead all the way from Troy to Athens (20 miles of hilly 2 lane) no problems. A little later he tried to drive up to Sayre and it started doing the same thing again. I drove it and at about 15 MPH it starts to run rough and die out let off the throttle and it idles down smooth. Does this sound like an EGR problem? It got all new ignition and a new exhaust system including the cat converter this past summer and has run great since then. Ideas?

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frankiee

02-18-2007 09:42:00




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 Re: O/T 85' Chevy S-10 with 2.8 carburated in reply to Steve Crum, 02-17-2007 14:25:40  
Could be crud in the carb bowl that cant get by the main jets.
Just floats around in there and acts up when it moves over the jets.
Seen it before. Same symptoms. Take air horn of top of carb and take a peak



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JOHN HARMON

02-17-2007 20:26:58




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 Re: O/T 85' Chevy S-10 with 2.8 carburated in reply to Steve Crum, 02-17-2007 14:25:40  
With all the talk of the "Carb" iceing up I have a question. My '85 Jeep Cherokee Chief came from the AMC Factory with a 2.8 Chev.Engine with Throttle Body Fuel Inj. It appears to have a Carb as part of this Fuel System. Is there a Carb. as part of this system? My Ford F350 w/460 engine was slowly loosing Power over the last few years and due to failing the Emissions Test last month we installed a new Cat Convertor and now it is like a new Truck. With the New Convertor,a total tune up and 91 Octane Pump Gas it pulls my 11,000 LB. Fifth Wheel Travel Trailor like it did when the Truck was new. It also passed the Emissions Test with flying colors I might add.

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riverbend

02-17-2007 17:43:25




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 Re: O/T 85' Chevy S-10 with 2.8 carburated in reply to Steve Crum, 02-17-2007 14:25:40  
Bad converter is my guess. A bad egr will make it miss at low speed and maybe die at idle. High speed works fine.

I put 400,000+ on an '83 S10. It did take a new intake manifold gasket once.



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woodache

02-17-2007 16:10:55




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 Carb Ice, I have same Re:O/T 85' Chevy S-10 with 2 in reply to Steve Crum, 02-17-2007 14:25:40  
Like someone said Carb Ice or Ice in the filter.

I have a identical powered 85 S-10 Blazer. If atmospheric conditions are exactly right I get Carb Ice with exactly the same symptoms. I just stop pull the top of the air cleaner open the throttle let it set for a few minutes start the engine with throttle open run it up to clear the Ice then just go on. I have a full size 82 C-10 with a 250 6 with the same carb, it does the same thing just takes more fog in the air to ice on the 250.

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1936

02-17-2007 16:01:53




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 Re: O/T 85' Chevy S-10 with 2.8 carburated in reply to Steve Crum, 02-17-2007 14:25:40  
Had five chev cars with 2.8 engines with carbs. at the same time. That has been one of Chev lesser ideas. You name it it hapeened to that engine. Best day was when I saw the tail lights for the last time. I rather drive Chev so it not sour apples for GM.



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old

02-17-2007 15:10:18




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 Re: O/T 85' Chevy S-10 with 2.8 carburated in reply to Steve Crum, 02-17-2007 14:25:40  
I agree with buddy on that one the convertor can and will do that. Of course the other thing maybe a tank full of bad gas. Try another filter and if it runs good for a little while I would say a tank of bad gas, also might add a bottle of heet to the tank just in case



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Steve Crum

02-17-2007 15:21:12




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 Re: O/T 85' Chevy S-10 with 2.8 carburated in reply to old, 02-17-2007 15:10:18  
With today's gas I wouldn't be suprised if it was no good. I did replace the converter this past summer along with the rest of the exhaust system. The converter was rusted out so I put a new Magnaflo stainless converter on it.



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Buddy Schiel

02-17-2007 14:42:58




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 Re: O/T 85' Chevy S-10 with 2.8 carburated in reply to Steve Crum, 02-17-2007 14:25:40  
I had a pickup that did that once and the catalytic converter was blocking up.



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Greg_Ky

02-17-2007 14:30:27




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 Re: O/T 85' Chevy S-10 with 2.8 carburated in reply to Steve Crum, 02-17-2007 14:25:40  
Carb. icing up? Do you have the heat tubes from the exhaust manifold to the air cleaner on?



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Steve Crum

02-17-2007 15:17:14




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 Re: O/T 85' Chevy S-10 with 2.8 carburated in reply to Greg_Ky, 02-17-2007 14:30:27  
I probably should have stated this, I bought this machine from an engineer in Maryland 2 years ago. And he's the type that everything MUST be perfect. And with this all the emissions and all other equipment that came from the factory is still in place and still fully operational. This even had a new Maryland emissions sticker on it.



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