What you are expiriencing is commonly reffered to as glitching. I have to quote all this from RC Car Action magazine, because I can't find the damn article online! Here it goes...
Quote Radio Control Car Action magazine, April 2002 issue:
"1. Check the reciever and transmitter voltage.
First things first: does the transmitter have enough juice to pump out a strong signal? Always keep fresh batteries in your radio, and if you run nitro, be sure your reciever pack is topped off."
"2. Protect the reciever from vibration.
When it comes to preventing glitches, virbration is enemy number one. Most people have no idea how much abuse a reciever takes during a race weekend. Cushion your reciever by stuffing foam rubber inside the reciever box. If your reciever is simply stuck to the chassis, apply two or three layers of servo tape to the mounting area to damp vibration."
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"4. Test the reciever crystals.
Cracked or damaged crystals immediately cause problems. Crystals are fragile, and if dropped or jarred, they can break or crack inside their metal housings (where you can't see the damage). If you have an extra set of crystals, pop 'em in. If the glitches dissappear, you'll know you had a bad set. To avoid damaging crystals when they are not in use, store them in a crystal case or in a box padded with foam rubber. For in-vehicle protection, pad the reciever described previously."
"5. Use grommets!
Like recievers, servos are also prone to glitching because of vibration-induced damage, particularly in nitro-powered vehicles. Whenever possible, install rubber grommets included with your servos to reduce the vibration that is transmitted to the servo case."
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"7. Inspect the reciever and transmitter antennas.
Run yor model with the transmitter antenna fully extended and with the reciever antenna at factory length. If the reciever is cut or damaged, have it replaced (the manufactuer should be able to provide this service for a small fee). FOr best reception, you should also avoid bundling th reciever antenna wire."
"8. Time for a tune-up?
If you've ever looked inside a reciever, you've seen tiny dials inside the circuitry. These dials are used by the manufacturere to tune the reciever. Over time, vibration and crash forces can shift a reciever's settings and throw it out of tune with the transmitter. If you suspect this has happened to your reciever, resist the urge to tweak the dials yourself; send the reciever back to its manufacturere for retuning."
And I'm just telling you to keep the clutch and all the bearings on the crankshaft oiled up, cause believe it or not, that can cause glitching too.
Hope this helps
L8r
