intermittent electrical problem

[bryn]

hi all. i'm having an intermittent problem with my car electrics. when accelerating on full throttle, it does so for a second or two, then i lose all power to the throttle and steering. then after the car is left for a second, power comes back. it seems to be ok on part throttle though? my system is
hot bodies d4
acoms 2.4ghz radio gear inc kit servo.
mtronics viper speedo
vapextech (or something like that) cells
basic modelsport slow charger.

does anybody have any idea what it may be? it's driving me nuts.
cheers,
bryn

[autonm]

i had this issue a few weeks back - turned out the connectors on the lead from the ESC to the battery were to slack.

So every time I went round a corner fast or over a jump, they would pop-out then reseat themselves and away I went again.

I simply replaced the connectors.

May not be your problem but its something to go on

[RichB]

sounds like it could be that the supply from the ESC to the receiver/servo isn't powerful enough, so that the load of full throttle causes the voltage to the Rx do drop too low and the Rx to 'reset'. A large capacitor connected directly to the Rx may help with this issue, maybe worth a try.

[Si Coe]

Its what Rich said. I've had the same problems with my Acoms system. If the input voltage drops too low it loses its bind to the TX and starts hunting for it again. Since this can take a few seconds the car kind of stalls for that time.
I had this a lot in my Micro T where the tiny battery can't supply the 10200kV brushless. I swapped to an old 27mhz set and the probelm stopped. The voltage to the rx still drops, but at worst it results in a tiny glitch

[bryn]

thanks guys. i'll check the battery connections but how the hell do i solve the voltage drop problem? where should i stick a capacitor and how big is a large capacity capacitor? in english please

simon did you give the post office peeps a kick up the arse?

thanks all.

[JJ The Boat Wizzard]

I Had the same problem with my dx3r and my micro reciver i just bought a specktrum 'Voltage protector' for about a tenner i think and that sorted it! I see no reason for it not to work with the accoms 2.4 system as i is only a capacitor

Hope This Helps
John