1979 j10 258 Motor Stalls While Giving Gas Uphill and then Wont Crank After Being Shut Off.

[Micahmoose]

My 1979 J10 with almost 90k miles will start up and run fine, it will climb hills and accelerate for 5 minutes. After that it starts to bog down and I have to let off the gas in order to not kill it going up hills and trying to go faster than about 40 mph. I have 4-5 psi of fuel pressure and I have .5L of fuel every 30 seconds so I don't think fuel getting to the carb is the problem, could it be the carburetor? It has the Carter BBD 2 barrel carb in it. I have taken it apart and cleaned it, not rebuilt it, and everything seems to be working fine. I am not sure how to tune it but I don't think that would cause this problem. Additionally after I turn it off, it will not start! I am 16 and have no experience with carburetors so anybody that does, PLEASE HELP!( I have also dropped the tank and cleaned all the lines, so that would not affect it either.)

 

[superj]

google using a vacuum gage on a carb and you will find youtube videos on how to tune your carb.

is your exhaust maybe clogged?

 

[Micahmoose]

google using a vacuum gage on a carb and you will find youtube videos on how to tune your carb.

is your exhaust maybe clogged?

I have not checked the exhaust yet but I will do that today. I know the catalytic converter is loose... Thanks for the tip on the carb though.

 

[superj]

there are also ways to tune you carb by ear, but they are not nearly as effective as a vacuum gage. i grew up with carbs and didn't have a vacuum gage till i had my 87 wrangler. i never knew what i was missing because the improvement i got using hte gage versus by ear/feel was amazing.

 

[Micahmoose]

there are also ways to tune you carb by ear, but they are not nearly as effective as a vacuum gage. i grew up with carbs and didn't have a vacuum gage till i had my 87 wrangler. i never knew what i was missing because the improvement i got using hte gage versus by ear/feel was amazing.

Thanks, I am going to check the exhaust and try to tune the carb right now.

 

[JPNinPA]

Make sure your gas lines are not near the exhaust. If the lines get hot it vaporizes the gas creating a vapor lock.


Never look down on anyone unless you are helping them up - Jesse Jackson

 

[Micahmoose]

Thank you, I will check that.