Carb and possibly dirty gas? |
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russosborne
Senior Member Joined: 01-January-2015 Location: Glendale AZ Status: Offline Points: 664 |
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Posted: 22-January-2020 at 9:58PM |
When I bought this 72 Ranchero, it would run as long as you dribbled gas into the carb. Pump pumping plenty of gas. I switch carbs to a new factory reman'd Holley Street Avenger (I think) 500 two barrel after a failed attempt at rebuilding the Holley that came on the car(IMPORTANT POINT HERE, I FAILED, I am NOT good with carbs). Car ran ok on pump alone. I had just jury rigged a fuel line at the time, went back to make it better. Ended up removing the carb's inlet filter to try to put a different steel line on it. Probably my mistake, as I couldn't get the filter back in. Now the car is doing the same thing, will run all day as long as you dribble the gas in from above. Still pumping plenty of gas. So apparently I hosed this carb. I am hoping I can spray carb cleaner into the inlet, as well as the rest of the carb, and install a cheap plastic/glass filter in line just to verify this is the fix.I have 3 extra filters for it, thinking the PO never cleaned out the tank. Once the filters run clean I will replace it with a good one. Am I on the right track? Thoughts appreciated. Thanks, Russ
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mkshelton
Senior Member Joined: 14-March-2012 Location: Sierra Vista Status: Offline Points: 357 |
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sounds like you have some crud blocking the fuel at the carb or the needle valve.
My initial thought was that you had a vacuum leak, that would explain the problem even with a rebuilt carb, but if the new carb ran until you tied it to the regular fuel line, it's likely plugged. My car regularly would "run outta gas" due to the old fuel system clogging up. Running double filters helped a tad, but the issues didn't really get resolved until I removed all the rubber lines and poured carb cleaner down the hardlines several times and then pushed compressed air through. 4 or 5 cycles of that and new rubber hoses and it's been perfect. (Oh, and I cleaned the gas tank over the course of a week.)
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"Sometimes I wonder if I'm actually UNinventing the wheel"
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russosborne
Senior Member Joined: 01-January-2015 Location: Glendale AZ Status: Offline Points: 664 |
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Thanks. I sprayed it with Berryman's a couple of times, including into the fuel inlet. Got the cheapo glass filter on, and once it got gas to the carb it fired right up and kept running. I had wanted to move it as we need to rearrange the driveway, but almost no brakes and the car didn't want to keep running without my foot on the gas while moving. So no go for that for right now. But it is running, YAY! Russ
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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any of the rubber lines could be dry and rotted maybe sucking air instead of gas? i thought that was the issue with alex's wagon ( the one joe is currently parting out) we messed with it for a couple hours not getting fuel! once we got the tank out i found the pick up tube was completely clogged in the tank after some spraying and running a wire or cable down through we got it mostly cleaned out then gas came through that car was from AZ too...
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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russosborne
Senior Member Joined: 01-January-2015 Location: Glendale AZ Status: Offline Points: 664 |
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Guess I wasn't too clear. Getting plenty of gas to the carb, just not going through the carb. But like I said, cleaned it with Berryman's cleaner, and put the cheap filter inline for now. Working good, need to get the choke connected (just one positive wire) and might need to adjust the idle. Idles way fast in Park, but when put in gear now it dies. That I can fix, I hope. Looking at buying a Ranger with our tax refund, so this isn't such a hot issue as of tonight. Pinto will be full project car, this will be semi-project. Thanks, Russ |
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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hmm high idle and dying in gear... sounds like a vacuum leak? but could be internal carb issues too???
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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handsofstone
Senior Member Joined: 13-April-2018 Location: Northeast Status: Offline Points: 3946 |
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Check the rubber modulator hoses for transmission too. Look at all the vacuum lines where they plug onto the nipples. Over time they tend to expand and match the shape of the little nub itself. If it ain't tight it ain't right.
Are the mixture screws on the carb roughly 1-1/2 turns out from the seats?
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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set the float level first, then adjust the mixture screws
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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