Topic: Rough idle on 82 CFI
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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Former Member
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Cramerton, NC - USA
Joined: 8/22/2006
Posts: 1094
Vette(s): black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion
Jeff, Sorry I didnt reply to your request about the fuel pump number. I didnt see the post until you posted today (Sunday) and it appears you have already ordered a pump. Just didnt want you to think I was ignoring your request. The pump I used was AC Delco # EP241 GM # 25116163. I hope the pump helps.
|UPDATED|10/16/2011 6:07:01 AM (AZT)|/UPDATED|
|UPDATED|10/16/2011 6:07:01 AM (AZT)|/UPDATED|
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Fuel pump definitely helped. Car is running much smoother and does not stubble during normal driving. Does not seem to flutter during cruising either.
Only thing I am not sure about is that each time I start the car the pressure seems to be different. It can be anywhere from 14 to 18 psi. Not sure if this is normal or whether I have another issue. Pressure also fluctuates about half a pound at idle but does not seem to affect the idle.
I am much happier now, just need to fix a few vacuum leaks in the headlight system (system was diconnected during test run) and then onto the next issue.
Former Member
Send PM
Cramerton, NC - USA
Joined: 8/22/2006
Posts: 1094
Vette(s): black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion
Lifetime MemberLemon Grove, CA - USA
Joined: 10/17/2007
Posts: 2041
Vette(s): 1982 C3 Collectors Edition 44000 miles, sat in the sun most of its life, My wife purchased it for me for Father's Day in 2007 from her girlfriend that had it for 19 years. It is on the road again. I'm retired but it is now my daily driver.
I have never heard of that type of fuel pressure fluctuations before. For that to occur would require that the regulator are malfunctioning I would think. I put in a 85 fuel pump and have adjusted the pressure all the way from mid 14 down to where I run it now about 11. Car runs fine but my gas mileage is about 10 mpg. Which is way off for a crossfire. But this is your post not one on mileage.
Like I said I have adjusted fuel pressure in about three places and it is rock solid no fluctuations at each of them. Before I put in the new fuel pump I had bad mileage and the car starved for fuel when I jumped on it. I rebuild the fuel regulator the left one on the rear TB controls the fuel pressure on the system.
|UPDATED|10/23/2011 11:28:37 PM (AZT)|/UPDATED|
Like I said I have adjusted fuel pressure in about three places and it is rock solid no fluctuations at each of them. Before I put in the new fuel pump I had bad mileage and the car starved for fuel when I jumped on it. I rebuild the fuel regulator the left one on the rear TB controls the fuel pressure on the system.
|UPDATED|10/23/2011 11:28:37 PM (AZT)|/UPDATED|
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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