Well, if you are local to one of the other forum members here, maybe someone will meet up with you and let you try one out? I'd get those connections straightened out first.

Does it hesitate under a light load? Like if you were to put the truck on a stand or something where the tires aren't touching anything? No load will pull much less current, and would at least eliminate interference...

I've crashed mine numerous times and those 5.5mm plugs are still tight. As a matter of fact, I tried to pull them apart once and ended up yanking the heatshrink off instead. If they ever get a little loose, I'd just use a tiny screwdriver to gently and slightly spread the prongs on the male plug.

Brian - good point. I forgot to mention that I have tested the motor and controller where I have disengaged the pinion from the spur and the motor runs smoothly. I didn't give it full throttle for fear of exceeding the motor's rpms, but I did go over half and it turned without hesitation.

The truck will roll smoothly under 1/8th throttle on concrete and pavement, but any additional throttle and I get the hesitiation. Its less of an issue on pavement, but if I roll into grass its a mess. It also happens in reverse on almost any surface.

Definitely think its a connection issue the more I talk through it.

Well Brian, my idea was to put a small nylon pin inside the male to prevent this. that would make it a good plug.

Daniel and I ran it a few times and they got loose. so apparently you are lucky! I just don't like them too much anymore. I swapped all the plugs to deans..

You have got a weird problem. if you have got another receiver (non PWM) try that one.

It is very strange indeed. I personally am thinking it may be the esc. I hope to be wrong. If you lived close to me I would gladly help you out. I don't have many rc people near me.

Well, I found my stutter and distance problems. My chassis was causing interference, so I got a receiver box. My truck went further, but still not quite right. Still had glitching. I replaced my ubec with a rx pack, now i can go all the way down (about 1 1/2 blocks) with no probs, maybe further! thanks guys. I hope you find the problem Steve, yours sounds a little different, I would check all connections as the guys said, i redid ALL of mine and my truck runs great now!

I just did a real short test run after direct soldering the esc leads to the motor. This might be the fix! Now I just need the stinking weather to break!

Steve

Good luck Steve. This is all the part that bites! Once you get it though, plug and run until you really break something! I just started runnin Nitro too, many adjustments, never just plug and run with those! Let me know what happens with your truck, i just tore mine all apart again to get ready for my carbon gorilla chasis to get here, next week forsure! At least I have it runnin so I can just throw it all together...

Alright guys -

Got to do a better test with the ESC direct soldered to the motor and there was an improvement.

On a smooth surface, I don't see any hesitation. If I go off into grass, there is still hesitation when I make any substantial stab at the throttle.

However, I did notice that reverse seems to move at a pretty good speed irregardless of the surface. Could it be that reverse has some type of program limitation on the 9920 (25% power, or 50% power) and this limits the strain I'm putting on the esc?

Next, I'm going to try and redo all of the battery connections. If that doesn't change anything then I know I'm probably down to a controller issue.

Any thoughts? Any recommendations on a better controller?

I thought the 9920 can go as fast back as forward? perhaps it's your transmitter that is the limmit?

Sounds like you hit the right way though.

You also said you had this with more than 1 battery-pack, right?

Mine started in reverse faster....so I just reprogrammed it, and whalla!

Trty adding a cap to the spektrum
 

Spektrum makes a capacitor that plugs into your aux port on the receiver. When the voltage drops when you gun it the spektrum receiver feels the dip in power and cuts.

Goooood point on the cap. I forgot about that! I might see if I can pick one up here shortly...

Actually, now that I think about it, since the receiver is running off of a dedicated rx pack I wouldn't think that would be the issue. Might try it just in case (its only 6 bucks).

Serum - it happens with all of the packs I normally run with my truck. Thats why I am going to redo the ESC side of the battery connections, hoping that I have a cold join or other issue.