Thread: GM carb'd 2.8 tuning??
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07-15-2006 02:16 PM #1
GM carb'd 2.8 tuning??
I have a 84 Chevy S10 with a carbuerated 2.8. I have been having issues with getting it to run well.
When I get into the secondary it will stumble and seems to backfire and run poorly before it starts to move faster.
I was hoping it was just due to a air fuel ratio problem but it looks like when I get into the secondary it runs between 12 and 13:1 and from what I understand that is good?
Im assuming I may be having vacuum problems. When I get into the secondary the vacumm drops down low. Im not sure what the measurements are on the guage but one side sais between 5 and 10 and the other is around 100 and 200.
Can anyone please help me
RJ
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07-16-2006 03:08 PM #2
Im not sure what carb it is past it being a stock rebuilt carb.
How do I check the EGR valve?
RJ
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07-16-2006 11:57 PM #3
take the egr off its got a diaphram inside see if the diaphram is torn or anything, its probably plugged up, if thats the case give it a good blast thru with brake cleanerjust because your car is faster, doesn't mean i cant outdrive you... give me a curvy mountain road and i'll beat you any day
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