vacum readings

[eric4g63]

So I have a pretty much stock 90gst with a mbc and a boost gauge and free modsat idle I get -20 and first gear I make 0 to 1 psi in 2nd I make 10 then it drops to 6 psi and third it goes to 15psi and stays I feel like something is wrong but not sure cause second feels like I just hit a wall when it builds boost

 

[Spoolingaround]

Where is the boost gauge T'd?

 

[TaLN91tsI]

second feels like I just hit a wall when it builds boost ...please explain. Falls flat then goes or no power at all? Other issues affectthis such as fuel. If fuel pressure or volume low, that can make car seem like a "boost" issue.

 

[Breezio69]

Best source is the fpr vac line.

I'd bet you have a boost leak, have you tested it or know how to?

 

[Spoolingaround]

Best source is the fpr vac line.

I'd bet you have a boost leak, have you tested it or know how to?

This can be a prime example of why T'ing into the for is bad! If you have a boost leak there, you will not have the appropriate fuel pressure.

 

[eric4g63]

I have it t'd to the fpr line from the manifold and what I mean by second hits a wall is it pulls really hard and then it seems like it does gain Ay power it just keeps going but I haven't done a boost leak test yet either though