Can you reset computer without disconnecting battery

I have an 04 zd30 patrol usual mods ,doesn't want to rev over 2500 rpm .like its in limp mode .:feedback:

I have not heard of it being re set with out being disconnected.
So disconnect clean the maf have a drink and re connect, Take it for a test
drive, What boost are you achieving, if known ??

Hi threedogs
Im getting about 17-18 psi ,I have a HPD style boost controller and egr block off plate .
Not sure if controller is set up right

could be your tps (throttle position sensor)???
pull it out and spray some contact cleaner in there to see if it makes any difference

Did the battery disconnect as threedogs suggested ,went to clean the maf .
I was messing around the other night n didn't reconnect it .
Major rookie error ,would still like some help setting up HPD boost controller though .
Thanks to all

Im not familiar with the HPD controller maybe @mudski can help you

Those boost controllers are like the Dawes and Tilix. Wind in for more boost and out for less. IF you are getting limp mode symptoms this may mean an over boost issue. But the cause can be a dud maf, incorrectly set controller, hole in the intercooler will also give poor performance.
If its not revving whilst sitting there with no load i doubt its the intercooler or wrongly adjusted controller. A dud maf can do this, blocked fuel filter too. Block air cleaner????
Bad fuel??? Possibly many other things too..

Sent from my GT-N7105T using Tapatalk

Mine was doing that as well and I have a feeling it is the boost sensor on the intercooler. When I was driving home it felt like I was being held back. Took my foot off the throttle and accelerated again and it was fine. Try turning your boost down a bit and see how you go.
Let us know