87 DS Gas cuts out in forward

[louden31]

87 Club Car Gas. Runs good in maintenance mode. Does 25 mph just fine in reverse. Runs just fine with rear wheels jacked up off ground in forward.
Chugs and cuts out in forward on street. Like you are turning ignition on and off. Its not ignition switch. I got it hot wired made no difference. Had this cart since 90 fixed many things but i am stumped. Micro switch at shifter cutting out under load [ forward ] ? Cam on shifter looks fine.
Any idea's would be big help.

[golfcartg]

Microswitches detect the position of the shifter lever and the status of the pedal, sending signals to the starter/solenoid to engage the appropriate gear (forward or reverse) and control the cart's acceleration. In this particular situation, where the cart runs smoothly in reverse and in service mode but experiences issues in forward gear, it's unlikely that the microswitches themselves are the cause of the problem. Since the cart functions properly in reverse, where the microswitches are also engaged, it suggests that they are likely functioning correctly.

When you say you put it in maintenance mode, this refers to a specific setting that allows for maintenance and diagnostic procedures to be carried out on the engine while the carts drive system is disengaged. Essentially, when the golf cart is placed in service mode, the drive wheels are decoupled from the engine power, allowing the engine to run independently without load, engaging the transmission or propelling the vehicle forward and backward.

The issue appears to be related to fuel delivery, as evidenced by the engine chugging and cutting out under load in forward gear. Given that the cart operates smoothly when the load is reduced (in service mode) and when using high torque gearing (reverse), the problem is more likely to stem from a fuel related issue, such as a clogged fuel line, dirty carburetor, or inadequate fuel supply. If you currently have an aftermarket carburetor installed, aftermarket carburetors lack precision tuning, leading to subpar performance and potential issues. Original equipment manufacturer (OEM) carburetors are meticulously tuned to the specific engine requirements for optimal performance and reliability. Therefore, replacing the aftermarket carburetor with an OEM one is advisable to address any potential fuel delivery issues effectively.

The carburetor plays a critical role in mixing air and fuel in the correct ratio for combustion in the engine. When you press the accelerator pedal, it opens the throttle valve in the carburetor, allowing air to enter. Simultaneously, fuel is drawn from the carburetor's bowl and mixed with the incoming air in the carburetor's venturi. This mixture is then delivered to the engine's cylinder for combustion. However, the proper functioning of a carburetor relies heavily on precise tuning and the correct air to fuel ratio. Aftermarket carburetors do not undergo the same level of tuning and calibration as original equipment carburetors, leading to imbalances in fuel delivery under load. Additionally, over time, carburetors can accumulate dirt, fine debris, and varnish from fuel, causing internal passages to become blocked or restricted. This buildup can disrupt the carburetor's ability to deliver the correct amount of fuel, resulting in issues such as poor acceleration, rough idling, and engine stalling. Therefore, maintaining a clean and properly tuned carburetor is key to smooth engine operation and optimal performance. If you have any questions feel free to ask