79 T/F IDLE PROBLEMS

B.IRVIN · Post by **B.IRVIN** » Fri Dec 07, 2007 5:32 pm

I HAVE A 79 TRAILFIRE. IT HAS BEEN SITTING OUTSIDE FOR ABOUT 14 YEARS. IT TOOK ME ABOUT 2 WEEKS TO GET A NEW GAS TANK AND CLEAN THE CARB UP. I GOT IT OUT ON 12/3 FOR THE FIRST SNOW. I HAD THE TIME OF MY LIFE ALL DAY. THE ONLY PROBLEM I HAVE IS THAT IT WILL NOT IDLE FOR ME.
ANY CLUES ON THE IDLE SETTING OR MAYBE THE FUEL TO AIR MIX.

THANKS ANYONE*

B.IRVIN

JoeRainville · Post by **JoeRainville** » Fri Dec 07, 2007 5:57 pm

Hello Mr. Irvin,

I will try to help out here. I am assuming you replaced the pilot jet and cleaned all the passages in your carb, so here are a few other things that could effect your idle:

1) Idle adjustment screw is out of adjustment, located on the side of carb.
2) Air screw is out of adjustment. I think it's supposed to be about 1.5 turns open.
3) Choke not seated correctly, or out of ajustment. Should be free play at the lever while in the off postion.
4) Crank seals could be shot. My old 82LX became hard to start and had no low end power after eating the PTO seal. Hearing that it sat outside for 14 years makes me think the PTO end of the crank could have rusted and is chew up the seal.
5) Drive clutch spring is weak, causing it to ride rub on the belt at idle
6) Clutches are out of alignment, causing the belt to rub the side of the drive clutch

I hope this info is of use to you. Please keep us posted on your progress!

-Joe Rainville

B)

B.IRVIN · Post by **B.IRVIN** » Fri Dec 07, 2007 6:14 pm

THE IDLE SCREW DOESN'T CHANGE ANYTHING
IS CLOCKWISE IDLE UP OR DOWN?

AIR SCREW- THAT IS ABOUT WHERE I HAVE IT

CHOKE- I THINK IT IS ABOUT PERFECT

CRANK-THAT WAS THE ONE THING I WAS SCARED OF
IF THAT IS THE PROBLEM WOULD I BE OK TO RUN IT LIKE THAT UNTILL SPRING IF I CAN DEAL WITH THE IDLE? <_<

JDKC · Post by **JDKC** » Fri Dec 07, 2007 6:37 pm

I could also be sucking air from your intake boot located between the intake and your carb. I know that on my trailfire I had a hard time to get that connection sealed up so it would idle correctly.

B.IRVIN · Post by **B.IRVIN** » Fri Dec 07, 2007 6:46 pm

THANKS,

I WILL CHECK THAT OUT TONIGHT AND GET BACK WITH THE INFO

B.IRVIN

JoeRainville · Post by **JoeRainville** » Fri Dec 07, 2007 6:51 pm

Good point about air leaks on the intake tract! Could be base gasket, intake manifold gasket or the carb boot as mentioned by JDKC.

If it is a crank seal, boot, or gasket you do run the risk of burning down if its run too lean too long. A check of plug color should help you verify mixture.

With the carb idle screw, clockwise should raise the throttle slide, increasing idle speed. Should that is!

Good luck with it,
-Joe Rainville

B)

Post by **ICCSF 108** » Fri Dec 07, 2007 6:53 pm

Or the idle circuit might still have a spec of dirt in the carb someplace you might have to reclean & blow out all the small orifices in the carb body with air or a spray carb cleaner.

Kenny

B.IRVIN · Post by **B.IRVIN** » Fri Dec 07, 2007 6:56 pm

YA I HAVE LEARNED THAT THE CARB IS PRETTY SENTITIVE

I WILL GIVE THAT A SHOT

THANKS,

B.IRVIN

B.IRVIN · Post by **B.IRVIN** » Fri Dec 07, 2007 8:46 pm

WELL SOFAR I FOUND OUT THAT IT WASN,T THE BOOT, SO MY NEXT STEP IS GOING TO BE THE CARB. I'LL GIVE IT A NICE CLEANING.

B.IRVIN

Post by **ICCSF 108** » Sat Dec 08, 2007 12:53 pm

B.IRVIN, We haven't heard a status report, was it a dirty carb or haven't you found the problem yet??? Was just wondering how it was going??

Kenny

B.IRVIN · Post by **B.IRVIN** » Sat Dec 08, 2007 1:12 pm

KENNY,

I DIDN'T GET A CHANCE TO CLEAN THE CARB LAST NIGHT. I WAS TO BUSY RIDDING IT.

B)

I LIVE IN INDY AND THE SNOW AROUND HERE IS WORTH GOLD TO ME. IT DOSEN'T LIKE TO STAY AROUND VERY LONG. <_<

IT ALL PRETTY MUCH MELTED TODAY SO AFTER WORK I AM GOING TO GET ON THAT CARB.

THANKS AND I WILL LET YOU KNOW WHATS GOING ON.

B.IRVIN

B.IRVIN · Post by **B.IRVIN** » Sat Dec 08, 2007 5:58 pm

OK I WILL DO THAT