1979 carb problem

Win · 05-18-2014, 06:27 AM

Having trouble with gas pouring in at the bottom of the carb in my 79 GS. Looking for someone to work on it or looking to sell the car. I am the original owner, car is in good shape otherwise with 96K on it. It runs, but can't be driven for long due to carb problem.

mystery · 05-18-2014, 06:04 PM

what state you live in? by bottom of the carb you refering to the primary jets or the bowls wont fill up?

Win · 05-24-2014, 06:13 AM

I am in CT. It looks like the gas is pouring in at the bottom of the carb. The float sight windows appear to be normal.

mystery · 05-24-2014, 04:39 PM

are you able to dump fuel into the carb and have it turn over? cause it sounds as though your having the same issue i had which was at first there was crap in the gas tank and it made it to the carb which then filled up my floats which wouldn't allow fuel to pass through the passages it needed. needless to say sounds like youll either need a new one or rebuild one you have which would be cheaper. if theres fuel coming out of your primary jets youd be in good shape but theres a diaphram on the side very small one that makes it happen which could be clogged up all of which would come with the rebuild kit.

Win · 05-26-2014, 05:43 AM

Thanks for the tips. The engine does run until it warms up, then it runs rough and has no power because of all the excess gas it is getting. This carb is actually a rebuilt one I bought a couple years ago. I have been working on this issue a long time, and can't solve it. I am really looking for someone who might be able to fix it, or to sell the car, since it is no longer usable.

Pete_89T2 · 05-26-2014, 08:32 AM

It's been ages since I messed with anything that has a carb, but if its flooding or running rich when warmed up, it sounds to me that your carb needs a rebuild/replacement. I'm assuming you haven't done anything to increase fuel pressure, and if it has a stock fuel pressure regulator it still works. You may also have fuel tank/system corrosion problems that can be a factor as well - bits of rust particles and/or dissolved rubber/plastic part turds in the fuel system (due to the ethanol they add to gas these days) can jack up an otherwise good carb.

If you're in CT, don't mind driving it to PA and are looking for an honest shop to sort this out for you and NOT rip you off, I'd recommend giving Dave Barringer (sp?) at Speed1 a call. Dave used to train Mazda techs back in the 80's, and knows these cars inside & out. Here's his contact info:

http://www.speed1allentown.com/
898 Old RT. 22
Lenhartsville, PA 19534
Phone (610) 756-3000

mystery · 05-27-2014, 10:45 PM

mine would do the same thing... on 3 different carbs i had found around town in salvage yards. i eventually attempted to rebuild one and it still had done the same thing. my advise on a stock setup check fuel pressure should be between 3 and 4 lbs and if that checks out completely replace the carb i was told by more than one rotary shop that the center piece of those carbs get porus and wont hold enough vaccum to keep it running high possiblity your experiencing the same thing.

Win · 05-31-2014, 06:20 AM

Thanks to both of you for the help. The car is not driveable, since it stalls and has no power once warmed up. The carb I have now is a rebuilt one, and I don't really want to try another one. I think the best way forward for me is to sell the car.

13x · 07-12-2014, 10:01 PM

don't give up .... flooded would be stuck float .... also make sure the idle mixture is not too rich

05-18-2014, 06:27 AM	#1
Win The Newbie Join Date: Sep 2013 iTrader: (0) Posts: 9 Rep Power: 0	1979 carb problem Having trouble with gas pouring in at the bottom of the carb in my 79 GS. Looking for someone to work on it or looking to sell the car. I am the original owner, car is in good shape otherwise with 96K on it. It runs, but can't be driven for long due to carb problem.

07-12-2014, 10:01 PM	#9
13x SinCityRotary Join Date: Feb 2010 Location: Sin City iTrader: (0) Posts: 207 Rep Power: 15	don't give up .... flooded would be stuck float .... also make sure the idle mixture is not too rich __________________ WHiV8 in the works!! May 2015 Email

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

05-18-2014, 06:04 PM	#2
mystery Rotary Fan in Training Join Date: Dec 2012 iTrader: (0) Posts: 91 Rep Power: 13	what state you live in? by bottom of the carb you refering to the primary jets or the bowls wont fill up?

05-24-2014, 06:13 AM	#3
Win The Newbie Join Date: Sep 2013 iTrader: (0) Posts: 9 Rep Power: 0	I am in CT. It looks like the gas is pouring in at the bottom of the carb. The float sight windows appear to be normal.

05-24-2014, 04:39 PM	#4
mystery Rotary Fan in Training Join Date: Dec 2012 iTrader: (0) Posts: 91 Rep Power: 13	are you able to dump fuel into the carb and have it turn over? cause it sounds as though your having the same issue i had which was at first there was crap in the gas tank and it made it to the carb which then filled up my floats which wouldn't allow fuel to pass through the passages it needed. needless to say sounds like youll either need a new one or rebuild one you have which would be cheaper. if theres fuel coming out of your primary jets youd be in good shape but theres a diaphram on the side very small one that makes it happen which could be clogged up all of which would come with the rebuild kit.

05-26-2014, 05:43 AM	#5
Win The Newbie Join Date: Sep 2013 iTrader: (0) Posts: 9 Rep Power: 0	Thanks for the tips. The engine does run until it warms up, then it runs rough and has no power because of all the excess gas it is getting. This carb is actually a rebuilt one I bought a couple years ago. I have been working on this issue a long time, and can't solve it. I am really looking for someone who might be able to fix it, or to sell the car, since it is no longer usable.

05-26-2014, 08:32 AM	#6
Pete_89T2 Lifetime Rotorhead Join Date: Apr 2010 Location: Elkton, MD iTrader: (1) Posts: 874 Rep Power: 15	It's been ages since I messed with anything that has a carb, but if its flooding or running rich when warmed up, it sounds to me that your carb needs a rebuild/replacement. I'm assuming you haven't done anything to increase fuel pressure, and if it has a stock fuel pressure regulator it still works. You may also have fuel tank/system corrosion problems that can be a factor as well - bits of rust particles and/or dissolved rubber/plastic part turds in the fuel system (due to the ethanol they add to gas these days) can jack up an otherwise good carb. If you're in CT, don't mind driving it to PA and are looking for an honest shop to sort this out for you and NOT rip you off, I'd recommend giving Dave Barringer (sp?) at Speed1 a call. Dave used to train Mazda techs back in the 80's, and knows these cars inside & out. Here's his contact info: http://www.speed1allentown.com/ 898 Old RT. 22 Lenhartsville, PA 19534 Phone (610) 756-3000

05-27-2014, 10:45 PM	#7
mystery Rotary Fan in Training Join Date: Dec 2012 iTrader: (0) Posts: 91 Rep Power: 13	mine would do the same thing... on 3 different carbs i had found around town in salvage yards. i eventually attempted to rebuild one and it still had done the same thing. my advise on a stock setup check fuel pressure should be between 3 and 4 lbs and if that checks out completely replace the carb i was told by more than one rotary shop that the center piece of those carbs get porus and wont hold enough vaccum to keep it running high possiblity your experiencing the same thing.

05-31-2014, 06:20 AM	#8
Win The Newbie Join Date: Sep 2013 iTrader: (0) Posts: 9 Rep Power: 0	Thanks to both of you for the help. The car is not driveable, since it stalls and has no power once warmed up. The carb I have now is a rebuilt one, and I don't really want to try another one. I think the best way forward for me is to sell the car.