Surging at light acceleration in park or gear
01-09-2014, 06:48 PM
#1
Staging Lane
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Surging at light acceleration in park or gear I have a carb setup on an older LS1.. Just slapped it into my C10 with a th350, and it surges at about 2-2500 rpm. Not sure what can be causing this.. I disconnect 1 set of coils at a time from the harness and it accelerates fine.. I connect both sets of coils and it surges. Any ideas?? I have a new fuel filter, fuel pump, and new carb... Please help
01-09-2014, 07:50 PM
#3
Most likely in the carb tune. That RPM range is about the point where the carb main jets take over from the intermediate circuit. Might need an air bleed adjustment. I don't suppose you have a wide band and can tell what the fuel mixture is doing when it surges?
Also make sure you have a MAP sensor hooked up. If not the stupid box will always put in max vac advance. Probably not the cause of your surging problem, but thought I would throw that out there in case you weren't aware of it.
Also make sure you have a MAP sensor hooked up. If not the stupid box will always put in max vac advance. Probably not the cause of your surging problem, but thought I would throw that out there in case you weren't aware of it.
01-09-2014, 10:26 PM
#4
Staging Lane
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Most likely in the carb tune. That RPM range is about the point where the carb main jets take over from the intermediate circuit. Might need an air bleed adjustment. I don't suppose you have a wide band and can tell what the fuel mixture is doing when it surges?
Also make sure you have a MAP sensor hooked up. If not the stupid box will always put in max vac advance. Probably not the cause of your surging problem, but thought I would throw that out there in case you weren't aware of it.
Also make sure you have a MAP sensor hooked up. If not the stupid box will always put in max vac advance. Probably not the cause of your surging problem, but thought I would throw that out there in case you weren't aware of it.
dont have a wide band.. I do have the map sensor hooked up. I will try the air bleeds now