After driving, car is up to temp then park up for an hour or so with engine off, start engine again and the boost controller (Profec b spec 2) indicates 13psi and the overboost alarm is sounding and car is not even moving. Rev engine a few times or drive away and the boost display returns to normal. Also the "LO" and "HI" somtimes flash.

Any ideas?

Any boost controller experts out there?

Is this a new profec ? or did it start acting like this all of a sudden ?

 

check the power input.. sounds like you connected the profec to a dodgy 12volt or ground source...best is to use the same power source as the radio.

 

-Eric

Its just over a year old and was fitted around the same time by JD. It started doing it all of a sudden, only does it when the weather is really hot, its as if pressure builds up some where when engine is off! Its a strange one!

was the little filter installed into the (boost)line to the unit ?

 

or is the line squeezed (bent) in any way ?

Yep the filter is installed. I'll check the line for any kinks or bends this weekend, good idea.

 

Thanks for you help :bow:

Also see if it makes any difference with or without the filter...it might be dirty