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Unread 10-07-2019, 12:56 PM   #1
Not Yet Wild
 
Join Date: Oct 2019
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Default Only starts when lightly pressed

I have an EZGO TXT 99 and 01. I have been working on them for years and pretty knowledgeable but man do I need some help with this one. The 99 TXT has always preferred the gas pedal be slowly pressed in order to start. Five years ago it started preferring to be pressed slowly and only half way. Now you have to barley press the gas in order for it to take. Runs awesome without skipping a beat when you going and usually starts much better after a little warm.

Over the years I have always set the valves yearly and replaced air fuel and spark plugs about every other. I have even played around with .004 to .006 on the valves to see if that would help. I have cleaned the carburetor and both jets plenty of times hoping that was the case. It may have helped but never fixed the issue.

I have above 150 in both cylinders. New spark plugs, coil is only 3 years old, new air filter, new fuel filter, cleaned carb and jets, set valves and triple check them. Fuel pump is newer and spitting good.

Anyone have any ideas? It almost seems like the fuel and fire are good but either air in or air out is restricted. Maybe muffler since it gradually got worse intake has been checked as well as trying to fire intake box completely open

Appreciate any help!
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Unread 10-07-2019, 02:20 PM   #2
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Location: South Texas
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Default Re: Only starts when lightly pressed

Sounds to me like you may have a vacuum leak or extra air slipping in somewhere... Maybe the butterfly shaft has worn a little gap or something... maybe a gasket going bad...

I’d put it on jack stands and run it while squirting a little carb cleaner or starting fluid around the carb and intake and see if you notice any engine speed changes... being careful not to get any in the intended intake
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Unread 10-07-2019, 02:41 PM   #3
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Default Re: Only starts when lightly pressed

I would suspect a throttle cable adjustment. Make sure the throttle cable does NOT move before the starter/generator starts spinning. You SHOULD be able to run JUST the S/G without actually starting the cart by pressing the pedal only a little bit (cart won't run though because throttle is closed and no air going in).

If the carb/throttle starts to open too early, then by the time the S/G starts to spin, the carb is at a much more "open" position than it should be (just to throw out a number, we'll say 1/4 throttle), so it will be harder to start. Choking may help some, depending on how far out of adjustment it is. This would also explain why it will start if you slowly and lightly press the pedal down (less throttle open) and also why it runs great once it starts running.

Out of adjustment cable will also affect low speed operation. I set mine so I literally have a "crawl" speed... I could get out and walk faster than the cart is driving if I had a way to hold the gas pedal down.
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Unread 10-09-2019, 01:31 PM   #4
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Default Re: Only starts when lightly pressed

Thank you for the replies,

I will not be back up at camp to try these suggestions for a few weeks but I will let you know how I make out. I believe I have the carb assembly pretty well air tight. Gaskets have been replaced and touched up with a small amount of sealer. I have never looked or checked the throttle cable so excited to see if that may be the issue. The starting condition has definitely gotten worse over the years. You wouldn't think anything was wrong by how it runs whether crawling or making dust. I was going to buy a new factory carb but I just don't think that is it.

Open to any other suggestions.

Thanks again
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Unread 10-09-2019, 01:57 PM   #5
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Default Re: Only starts when lightly pressed

Thank you for the replies,

I will not be back up at camp to try these suggestions for a few weeks but I will let you know how I make out. I believe I have the carb assembly pretty well air tight. Gaskets have been replaced and touched up with a small amount of sealer. I have never looked or checked the throttle cable so excited to see if that may be the issue. The starting condition has definitely gotten worse over the years. You wouldn't think anything was wrong by how it runs whether crawling or making dust. I was going to buy a new factory carb but I just don't think that is it.

Open to any other suggestions.

Thanks again
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