'77 350 loping, bad idle
#1
'77 350 loping, bad idle
I have a 1977 Chevy step van. It has somewhere over 300,000 miles. Been running fine. It has a 1405 edelbrock carb. Last Monday I needed to get some supplies. Started up fine, drove over a mile to the stop sign, it started surging real bad. I had to maintain a high idle to keep it from stalling. It would surge to 1500-2000 rpm, then die, surge again then die. I was able to get it home by riding the side of the road, pushing the throttle, then as it would bog down, I would ride the cluth for another 30-40 seconds, then be able to go again.
Since, I have replaced the plugs, wires, even the gas pump and carb.
HELP
Since, I have replaced the plugs, wires, even the gas pump and carb.
HELP
#3
#5
Always had standard mechanical fuel pump, then about 3 years ago it seemed to not produce enough pressure at takeoff. I added an electric pump as a booster before the mechanical. since all this has been happening, I have replaced the mechanical fuel pump, no help, then disconnected the electric pump, again , no help
#6
CF Monarch
I'd strongly recommend you check fuel pressure. That carb needs no more than 6-8 psig. If the electric pump is putting out more than that, I'd recommend a pressure regulator.
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#8
CF Monarch
This could or would have been an issue since you installed the pump, just more noticeable now. I ordered one for my son in law from Holley, same regulator auto zone advertised but quite a bit cheaper.
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Dusty Gordon
1988 - 1998 (GMT400)
5
April 15th, 2019 12:36 PM