2003 Club Car wants to keep running after braking and kicks into reverse

[lottabeef]

I am looking for some help with my 2003 Club Car DS. The cart seems to run fine for a while and then I randomly hit the brake. The cart stops and then the engine wants to keep running and then kicks into reverse. This happens often and quite bothersome. When you hit the gas again it takes a few seconds before it wants to continue forward. I don't want to throw parts at it, so I wanted to see if anyone else has experienced this. Thanks for your help!

[lockman1]

Welcome to BGW lottabeef!

When you say it continues running when you stop... Does it seem like it's "dieseling"?
(run-on after the engine shuts down)

[lottabeef]

I read a few posts on here about it dieseling. I went ahead and cleaned the carburetor(which it certainly needed) and it's still acting up. I thought that would have fixed it, but I was wrong. My next thought was replacing the micro switches. I would guess I would need to replace all 4 of them. 2 in the black box and 2 on the Forward/reverse shifter. I haven't done that yet. I wanted to hear back from everyone first.

[bc13]

I struggled with dieseling for a couple of years with my 92 club car ds, and i finally figured out it was the carb butterfly not closing all the way, so when the engine got good and hot the fumes would reignite through the not fully closed door and cause dieseling. So what you can do is get it good and hot and when it starts to diesel hop off quick and pull up the seat and manually close the carb all the way. If the carb is the problem this should kill the dieseling right away. Gives you something easy to try before spending $ on something else.

[meimk]

Originally Posted by bc13

I struggled with dieseling for a couple of years with my 92 club car ds, and i finally figured out it was the carb butterfly not closing all the way, so when the engine got good and hot the fumes would reignite through the not fully closed door and cause dieseling. So what you can do is get it good and hot and when it starts to diesel hop off quick and pull up the seat and manually close the carb all the way. If the carb is the problem this should kill the dieseling right away. Gives you something easy to try before spending $ on something else.

Sometimes it's caused by the cart being sped up too far: the carb butterfly is held part way open by the cables even when at rest. It can also be from someone having set the idle screw on the carb up to where the butterfly doesn't close completely. You say you've already cleaned the carb so we can probably ignore the build up keeping the butterfly open possibility.

[lottabeef]

Would dieseling actually kick the cart in reverse? This happens everytime and the gear is always switched forward.

[lockman1]

From what I've read, the most common cause of dieseling is excessive carbon on the cylinder head,
There's one trick for that before removing and manually cleaning the head...

• Get a can of Seafoam,
• remove the spark plug, and pour 1 oz (shot glass) of Seafoam in the plug hole,
• reinstall the spark plug WITHOUT connecting the plug wire,
• turn the engine over a few times, and let it sit, and soak for 20 minutes,
• With the cart outside, and in Maintenance mode,
• reinstall the plug wire, and start the cart, (the exhaust will smoke like crazy)
• run the engine at part throttle until most of the smoke dissipates,
• put the cart back in "run" mode, and go for a long ride!

It's worked for everyone that's tried it!

[bc13]

Originally Posted by lottabeef

Would dieseling actually kick the cart in reverse? This happens everytime and the gear is always switched forward.

When the engine keeps firing it actually runs the engine in reverse. That's why you back up.

[lockman1]

Originally Posted by bc13

When the engine keeps firing it actually runs the engine in reverse. That's why you back up.

[lottabeef]

Believe it or not, I have actually done the seaform procedure twice in 2 weeks and it still wants to act like it's dieseling. How many times does a person need to do this procedure? Or is there anything else it could be?