Yesterday, I removed all of the spark plugs, looking for any signs of uneven firing and hoping to see if one cylinder was running lean. They all looked identical and I made sure all of the coil boots and wires were secure when I put everything back together. Took it out for a ride and................no difference. Sometimes it will stumble when I come to a stop and sometimes it won't. Weird.

I hoping someone here can tell me a way to verify if the mass air or throttle actuator might be bad. I hate to throw parts at this thing knowing the expense of them.

Dale