Hey all

Just got my ecu+ installed with the GM 3bar. I did a quick 3rd gear pull but only got to about 6k. Anyway the output from my MAP was hopping between 19.3 and 17.7. Kinda like a saw tooth wave. I this normal? My boost gauge was around 1.5 bar.

Thanks

 

Well, it depends on the boost source your tapping off.. If its a source shared by an electronic boost controller then its possible..

If you can "feel" it when it does that, then check your plugs it may be misfiring..

 

check your plugs and then make some changes
go luck