As solutions go, this might be a bit extreme...

"Pixel" (Improbcat) 06/09/2015 at 10:21 • Filed to: None

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I’m really frustrated with the 230 in the truck right now. It is original to the truck, and in theory I like inlines, but this one is driving me nuts. It uses gas on a level usually reserved for high-power big blocks, and gives me nothing but smelly exhaust in response. I pretty sure I’m getting single-digit MPGs, while it dumps so much gas into the motor that it is washing past the rings and thinning the oil AND pouring out the tailpipe and causing smokey exhaust and backfiring on the overrun.

It has a pertronix unit in the distributor, which at least helps it run better, but I have not been able to get it to stop just dumping so much fuel through the carb. While there is an idle mix screw, I can’t seem to figure out how to change how much fuel it dumps in when the throttle is applied.

I’m getting so annoyed at this I’m pondering a 5.3L LS swap just to be rid of these issues. More HP and better gas mileage and FI reliability, all for $1000 if I can find a cheap used motor.

RamblinRover Luxury-Yacht > Pixel 06/09/2015 at 10:27

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Your carb is just trying to help you make High Torque, brah. Actually, I think your carb is literally Hitler.

RamblinRover Luxury-Yacht > Pixel 06/09/2015 at 10:29

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More helpfully, have you checked the float level and whether it matches the spec for your engine/carb setup? If the float needle isn’t behaving/sealing properly, it can also cause overflow either out of the carb or down the throat. What carb is it, anyway? Rochester? Carter? Holley?

505Turbeaux > Pixel 06/09/2015 at 10:30

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or you could rebuild the whole damn thing in the car for a few hundred likely enough. What is on it for a carb, the Rochester B? If so those jets can be swapped out easy enough

E92M3 > Pixel 06/09/2015 at 10:30

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Sounds like it’s definitely running too rich. I believe you may have to change the jet. Does it ever pour gas out the top of the carb from the vent? If it does that would suggest a check valve that’s not closing due to a float level issue or dirt in the valve itself. Lets see a picture of the truck itself!

RamblinRover Luxury-Yacht > 505Turbeaux 06/09/2015 at 10:34

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Rochester B is what I have on my Rover, partly because MOAR POWAR, partly because it’s what I got with it, and partly because the Zenith carb likes leaking and is for self-hating flagellants and the Solex is for weirdies.

Berang > Pixel 06/09/2015 at 10:40

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First thought would be a sticking float needle, although as others have suggested the float level might be wrong. Sometimes old brass floats can get a pinhole in them allowing fuel to seep in slowly sinking the float too.

505Turbeaux > RamblinRover Luxury-Yacht 06/09/2015 at 10:49

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why do I love Solexes so? I have rebuilt probably 100 of them. So many people think they are for weirdos and I don’t understand it

RamblinRover Luxury-Yacht > 505Turbeaux 06/09/2015 at 10:53

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The reason not to have one on a Rover used to be that the parts for that model were unobtanium. Now that they’re available again, it’s probably the preferred OEM carb, but it *is* a carb with a side-chamber heated rotary-valved mix-chamber choke and a whole bunch of weird air-tube balancing and crack, so I’m sticking with “for weirdies”.

505Turbeaux > RamblinRover Luxury-Yacht 06/09/2015 at 10:55

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yeah the VW 32/34 PICT are not anything close to complex. I have seen a few LR ones around but haven’t messed with them much

RamblinRover Luxury-Yacht > 505Turbeaux 06/09/2015 at 11:08

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Diaphragm accelerator pump, heated mix-chamber in a bypass tube with rotary valve for choke - orifices for air and fuel in three positions. It uses the main butterfly to make possible pulling air through the choke, so you start it with your foot off the gas. Dumping tube for extra fuel aimed down the throat, and a funky little barrel float that operates sideways.

Luc - The Acadian Oppo > Pixel 06/09/2015 at 11:11

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I got to rebuild my carb too big time. I have a 350 with a Rochester Quadrajet I can drive the truck like a sweet old lady and I’m lucky if I can drive for 2 hours on $30 bucks gas. I’d be honestly surprised if I got 10mpg hwy at the moment. I’ve NEVER experienced anything that drank fuel like this truck does. I knew it would be bad but I never in a million years thought it would be this bad.

The truck is running way too rich when I start the truck it blows black smoke all over the place.

What kind of truck is yours?

MontegoMan562 is a Capri RS Owner > Pixel 06/09/2015 at 11:12

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That sounds a bit hasty for a high fuel issue, but I get being frustrated.

I recommend a carb rebuilt. could be the float, maybe put in smaller jets when you rebuild.

505Turbeaux > RamblinRover Luxury-Yacht 06/09/2015 at 11:31

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I am still sad I didn’t pick this up for $10 at the local antique place. I went back the following week to buy it and it was gone!

Pixel > E92M3 06/09/2015 at 15:33

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I can’t figure out where the jet is on this thing. I rebuilt it once but there was no mention of a jet and not extra jets in the package.

Pixel > Luc - The Acadian Oppo 06/09/2015 at 15:33

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1964 Chevy C-10.

Pixel > RamblinRover Luxury-Yacht 06/09/2015 at 15:35

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I checked the float level when I rebuilt the carb last year, but given it was the first rebuild I’ve ever done there is no guarantee I did it right.

I believe it is a rochester, but it has been a while since I rebuilt it and I can’t find a pic of it to compare and be sure. Seems these could have come with rochester, holley or carter single-barrels.

RamblinRover Luxury-Yacht > Pixel 06/09/2015 at 15:47

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I’ve had my Rochester stick open before, but mostly it then proceeded to urinate gas everywhere, not just down the intake.

E92M3 > Pixel 06/09/2015 at 16:40

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I know when I rebuilt an Auotlite 1100 the instructions told the float measurement, but wasn’t clear where to measure from. I assumed to measure from the top of the bowl chamber. It wasn’t till I watched a youtube video from Mike’s Carburetors that I realized it was supposed to be from the carb flange itself. I would double check it, because it could be too high. Mine was set too high and allowed fuel to come out the vent. You could aslo check the mixture setting. Go in a 1/4 turn at a time till you don’t get black smoke. You need to have the float right first though.