New F & 2F carbs

Joined
Aug 28, 2015
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SC
I had a similar issue with my carb. I think many of them have debris in them from manufacturing. Once you clean it and blow all the channels out it should be fine. No issues with mine after that. I only run ethanol free fuel as mine sits a lot.
 
Joined
Aug 15, 2008
Messages
391
Location
Spokane WA
 
 
I was having some serious issues maintaining speed while climbing hills with my Trollhole Carb. The mechanic said that because of my headers and aftermarket cam it was starving of fuel so when he re-built the OEM carb he also re-jetted it, seems to be running 95% better climbing hills now.
 

Advrider639

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May 23, 2011
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454
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Athens, GA
 
I had issues climbing hills or really time under load, but that was due to a massive vacuum leak at the intake. I shimmed it out (header flange is larger than intake) and problem solved.

The carb seems to be working as it should now that I’ve cleaned it. I will get it up to temp and park in the sun today to try and replicate my problem from Saturday.

My motor seems to be down on low end power, but once it picks up rpm it really gets peppy. I am thinking the headers might be affecting the low end power not the carburetor.

My only comment left about the trollhole carb is I don’t feel like my mixture screw does anything. I have tried to lean drop it a few times now and the mix screw makes no difference in how it runs.
 
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Advrider639

SILVER Star
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May 23, 2011
Messages
454
Location
Athens, GA
 
@Borrego

So I spoke with @Trollhole this afternoon, he said that if I am pulling around 15-16 on the vacuum I still have a vacuum leak and that could cause the mixture screw to not have any effect. I might be misspoken, so don't take that to the bank. I pulled the needle out to check the condition and it is still as it should be, no damage.

I drove the truck around this afternoon, got it up to 30-40 MPH up hills (to get the secondary to fire) and then parked it in the sun for around the same time as Saturday. Walked back out after 20 minutes and the truck fired up and idled as it should.... BUT it did have a little hesitation and gurgle for the first few seconds.

This is all new to me, I have never driven a properly set up 2f so I really do not have a proper comparison point. I can only tell when my truck is running better or worse than before. I do wish it would fire up at the first turn of the key... to much to ask?
 

Advrider639

SILVER Star
Joined
May 23, 2011
Messages
454
Location
Athens, GA
 
I added alittle advance... resting around 10-12deg. Was able to get my vacuum readings around 18. With this I was then able to tighten the mixture screw in until it got tight, then backed it out 2.5 turns. This did make the rpm’s increase, which I leveled out with the idle screw.

I do not have a tac so I am mainly just going by ear.... but I would say my engine is running better than it was two days ago.

I’ll check the hot start again tomorrow.
 
Joined
Apr 29, 2015
Messages
316
Location
Coeur d' Alene, ID
 
@Borrego

So I spoke with @Trollhole this afternoon, he said that if I am pulling around 15-16 on the vacuum I still have a vacuum leak and that could cause the mixture screw to not have any effect. I might be misspoken, so don't take that to the bank. I pulled the needle out to check the condition and it is still as it should be, no damage.
I think mine may be a vacuum leak as well. I was checking around the base of the carb and it looks stained in one spot. I'll have to check with my vacuum gauge. Thanks for the tip!
 

Advrider639

SILVER Star
Joined
May 23, 2011
Messages
454
Location
Athens, GA
 
I will be replacing my manifold gasket with a remflex as soon as it’s delivered. I still have a slight exhaust leak with my current set up.

I took the truck out again today, 20 min drive, stop go, speeds up to 45mph. Parked it in open sun light and 20 minutes later, foot to the floor on the accelerator, it started right up. Little bit of smoke for a around 10 seconds but quickly went away and it drove fine.

Between cleaning out the carb, advancing the timing slightly, and adjusting the mixture/idle I seem to have a much better running truck.

Good luck to everyone else!



Edit:
Well... I am flooded again... I left it out in the driveway (level) this afternoon and when I tried to pull it into garage, nothing. Cranks and cranks and cranks. Flooded again.

Could a improperly vented gas tank cause issues?
 
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Joined
Jan 2, 2009
Messages
70
Location
fort mill sc
 
 
Help. I have had this nice trolhole carb on an 85 fj for years and all the sudden not gas in the site glass. I turn the key and idle shut off clicks. Is there a way to get gas into the carb. I replaced the fuel pump and filter. so gas is getting there. thanks It will run sometimes then just stalls and then i have push it back home.


rich
 

shipmag

Hagler Technology LLC. Aka Shipmag
Joined
Jul 1, 2012
Messages
1,459
Location
Cape Girardeau Missouri
 
Help. I have had this nice trolhole carb on an 85 fj for years and all the sudden not gas in the site glass. I turn the key and idle shut off clicks. Is there a way to get gas into the carb. I replaced the fuel pump and filter. so gas is getting there. thanks It will run sometimes then just stalls and then i have push it back home.


rich
Thats why you should install a tow bar. These old vehicles always seem to stop at not good times. So i put a tow bar on mine. And at interstate speeds these old girls dont like that 70 mph so I flat tow to get where I want to play.
 
Joined
Apr 28, 2015
Messages
179
Location
Manchester, CT
 
Help. I have had this nice trolhole carb on an 85 fj for years and all the sudden not gas in the site glass. I turn the key and idle shut off clicks. Is there a way to get gas into the carb. I replaced the fuel pump and filter. so gas is getting there. thanks It will run sometimes then just stalls and then i have push it back home.


rich
Check to see if fuel is pumping with it disconnected from the carb, run it into can or bowl. If very little is getting into the can then it may be a clogged filter or sediment in the tank. If there is good flow then something may be in the carb or needles. Bowl float could be stuck too and not letting fuel in. I would pull the carb and lightly run some compressed air through. make sure it is come out, same with carb cleaner.
 
Joined
Aug 15, 2008
Messages
391
Location
Spokane WA
 
 
Check to see if fuel is pumping with it disconnected from the carb, run it into can or bowl. If very little is getting into the can then it may be a clogged filter or sediment in the tank. If there is good flow then something may be in the carb or needles. Bowl float could be stuck too and not letting fuel in. I would pull the carb and lightly run some compressed air through. make sure it is come out, same with carb cleaner.
Also be sure to check your oil to make sure all that gasoline is not running from the carb into your engine. Mine had been flooding for awhile and when I checked my oil it had a bunch of gas in it.
 
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