Strange turbo fuel controller problem??

Sean

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I have an older Dobeck based Powderlites controller that did something really weird today. Half way thru the day,while I was RIDING THE SLED the fuel controller decided on it's own to reset all the settings to the original baseline. The sled had been running flawlessly all day to that point. I had just got done climbing up through a powder field and I was getting ready to climb up a little hill. I punched it and as soon as the sled started building real boost the A/F went way lean (19.0 to 20.0) and the sled made a real sick sound and I instantly backed out of it. I limped the sled back on to the road and started looking for a problem. I figured the hose running from the controller to the throttle bodies had gotten a hole in it. After checking for leaks and finding none I started the sled to check the controller settings. This is when I discovered all the setting in the controller had went back to whatever the baseline was. Talk about weird, this happened while I was riding the sled. Anyways I reloaded all my setting to the best of my memory and the sled ran another 30 miles and never missed a beat other than me trying to dial it back in. I kept expecting the controller to fail again but it never missed a beat. I defiantly don't trust it anymore. The thing I was wondering is if anyone else has ever heard of one of these Dobeck based units doing this? And if so what causes it? I assume I better start looking for a new controller. Any info is appreciated.



It is on a 06 Apex with a Alpine turbo on it.
 
people have said that those old style controllers blow out the internal map sensor/ boost sensor and then don't work any more. I don't know for sure. I am running a pure logic which is still a dobeck based controller.

Talk to dave at powderlites he will set it straight and has one of the nicest controllers running now with that RB3.
 
I ran it 40+ miles on SUnday and it never missed a beat

We went out Sunday and did 40+ mies and the sled ran great. It never missed a beat. I still don't trust it though.
 


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