Probably starting a week ago or so I noticed my car was not reaching it's normal boost pressure. I have a 2.8 and was usually seeing about 17.5-18 psi but since then the max i've seen is 15.5. I logged this numbers with hpt to rule out the stock gauge and then I tried pinching off the vacuum line that goes from the bypass valve sol. to the valve on the supercharger and that did nothing as well. does anybody have any idea of where to look or have seen anything. Yes I did use the search feature for about an hour and found nothing. thanks for all that help.

 

Whats the weather like? Warmer temps will yield lower boost

 

It was like upper 50's today but we have had a few days close to the 70s and it never changed before that. My IAT2's were around 125-130 after a pull through third. The car still is getting all the commanded timing and still feels like it is pulling hard through all the gears.

 

Possible leaks somewhere? It could be anywhere from heat causing the different levels, or it could be a leak in the line or a gasket.

 

bump

 

Your fine....Mine does the exact same...40-50ish i will hit 18-19ish, in warmer weather it at like 16