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Old 03-08-2010, 03:09 PM   #1
Land Owner
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Default Hesitates and backfires...

...but starts pretty quickly. 2002 model. New battery recently installed. Just bought it on impulse, because it was there.

After clearing the gravel driveway, headed down the hard road, she opens up OK but about every 15-20 seconds abruptly throttles down then picks up speed again. Dangedest neck-whippinest ride I have had in a while.

Then, about every third throttle down, she backfires...right there under the seat and under my most tenderest parts. That's not right!

I don't have a service manual yet. Any ideas?
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Old 03-08-2010, 03:36 PM   #2
kevinandrew
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Default Re: Hesitates and backfires...

danger!!!!!!!! backfiring is not a good thing! have done something to your rev. limiter? or the govenor? let me tell you about my experience. i took the ground of my rev limiter, and teaked the govener to achieve higher speeds. this is seemed like a good the time, but throw a teenage son into the mix and you get one dead golf cart. what happened is pretty simple to explain. the motor over reved, and couldn't keep up. it started to back fire. now i have a blown head gasket, burned head, burned cylinder, blown crankcase gasket, and who knows how many other problems. a new motor for my club car runs about $1600.00. mine could be rebuilt for slightly less. instead i'm opting for ........motor swap. i've found 16hp briggs that i'm thinking about stuffing in there. my club car dealer is frowning in disaproval....he says that i'll be sorry. hey i'm already sorry, and i have nothing to loose now. so that's my sad story ;(
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Old 03-08-2010, 08:22 PM   #3
clubcar810
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Default Re: Hesitates and backfires...

i dont think you would be sorry with a big block transplant!! when mine motor detonates im gonna do it!!
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Old 03-10-2010, 08:08 AM   #4
ckiguy
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Default Re: Hesitates and backfires...

well try this if you want, if you have no idea ion the maitance records, pull the carb give it a good cleaning. wont hurt, takes about an hour. see if you can go and find the seach area or ask lockman(i think he posted it on here about 2 weeks ago) cc procedure on how to set your governor to factory specs. and then in the front of you engine, right above the oil drian plug, or bsicly the carb, you will se a black plaic box, with a strap that holds ot to the engine. there are 2 wires fro this. one has a bullet connctor to the ignitor/coil and one has a ring connector. make sur the ring connector is hooked up. it is the ground fro the rev limiter. i wold start here. and then i would also check out odf a whim if the air filter and air box are bothe ok, meaning if the air box is not staving for air, filter, blockage, i have seen diesel motors surge due to lack of air, and then when you give them un restricted air movement, clears up. but diesels are used by controling the fue, not the air and fuel. plus it willgive you and idea if your lil toy was a good buy, or a oh crap buy!
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Old 03-11-2010, 05:39 PM   #5
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Default Re: Hesitates and backfires...

Really good ideas ckiguy. This weekend looks to be a good one for dismantling the seats to get to the engine compartment unobstructed.

I "tried" the zip tie thingy on the governer for 10 minutes with BAD results last week (four times more often it hesitated - but went pretty fast) and immediately went back to OEM-fast. No backfiring though. I won't do that again as I am NOT a go-fast Carter. I rather enjoy the more mellow pace and will appreciate my cart just that much more - as the longer it lives the better.

If I throttle the accelerator to mainain a constant speed below the upper (to me anyway) OEM limit, it will cruise and cruise and cruise without hesitation or backfire. But, feathering the accelerator is not the way that this cart should operate.

I will search this board for the "cc procedure" and all other pertinent topics in hopes of learning how this beauty operates.

Thanks for all replies.
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Old 03-11-2010, 06:15 PM   #6
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Default Re: Hesitates and backfires...

Not sure but could the cables use some lube?
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Old 03-11-2010, 06:20 PM   #7
kevinandrew
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Default Re: Hesitates and backfires...

are you getting enough fuel to the carb? maybe you have a vaccuum leak somewhere and your fuelpump isn't pumping like it should.
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Old 03-12-2010, 08:32 AM   #8
crash12888
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Default Re: Hesitates and backfires...

I would say from what you are explaining you are over reving and bouncing off the rev limiter.
Sounds like someone adjusted the throttle a bit to much for more speed.

The rev limiter kills the spark when it gets to a certian RPM so it doesn't over rev and damage the engine.
While you have no spark, the motor is still turning drawing fuel into the cylinder until the RPMs drop and then you get spark back but with all of the raw fuel you get a backfire.

Under the seat on the drivers side there is a black plastic box, remove the lid, you will see an adjustable cable coming out the side of the box and heading back to the transaxle.
loosen the two 10mm nuts and adjust the cable "in" just a little closer to the rotating cam.
This will drop the RPMs so it won't bump the rev limiter and you won't have to feather the throttle.
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Old 03-12-2010, 08:50 AM   #9
kevinandrew
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Default Re: Hesitates and backfires...

Quote:
Originally Posted by crash12888 View Post
I would say from what you are explaining you are over reving and bouncing off the rev limiter.
Sounds like someone adjusted the throttle a bit to much for more speed.

The rev limiter kills the spark when it gets to a certian RPM so it doesn't over rev and damage the engine.
While you have no spark, the motor is still turning drawing fuel into the cylinder until the RPMs drop and then you get spark back but with all of the raw fuel you get a backfire.

Under the seat on the drivers side there is a black plastic box, remove the lid, you will see an adjustable cable coming out the side of the box and heading back to the transaxle.
loosen the two 10mm nuts and adjust the cable "in" just a little closer to the rotating cam.
This will drop the RPMs so it won't bump the rev limiter and you won't have to feather the throttle.
crash,

i wish i had known this about over reving before my son and his friends blew my fe290 up

kev.
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Old 03-12-2010, 05:53 PM   #10
ckiguy
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Default Re: Hesitates and backfires...

i found this on another post from crash, under fe350 backfires. he already commented on here. i will try to find the cc procedure for setting the cables, linkage and such to factory specs. for you.




Hey Torey, what you are describing is caused by the throttle plate not returning to fully closed when you let off of the pedal.
When you let off of the pedal it does two things, 1st it closes the throttle plate in the carb by way of the linkage, 2nd it kills spark to the coil/plug by way of the "grounding" micro switch, with the throttle open even just a bit coasting or slowing down it is still drawing fuel into the engine but with no fire.
When you push the pedal to go it ignites the fuel in the cylinder and BOOM!

Screw the throttle stop screw out until it doesn't touch the throttle arm and then start the cart in neutral, rev it half throttle a couple of times and then let off of the pedal.
Carefully push the throttle arm toward the stop screw.
If it will rotate more closed then you have your linkage adjusted to tight.
It needs to close completely to eliminate the backfire.

Also you need to adjust you linkage so the "start" micro switch engages just before the throttle starts to open.

Sorry so long but I like to explain how and why things do what they do.
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