Not sure what else to do?

[BLKGSX23]

Ok so about a month ago I dropped in a new motor and got everything put back together. Car is extremely hard to start but I figured it was cause of the FIAV block off plate I put on from what Iv read! Besides that it ran really good for a week or two and then one random day it started not pulling like it was like something is holding it back. Im running 20 psi and Frank L5 20g and see full boost around 4200 and it sounds like it spools fine and reads 20psi on the gauge but doesnt pull! Yes I have done a boost leak check and found nothing, Double checked the timing and still nothing! Not sure what else to do? The only Vacuum lines I have are for my boost controller and thoughs all have been checked also! Another weird thing is on my gauge at idle it reads 8 psi of vacuum but when im looking on DSMlink the boostest is -20.4 or something like that! Any input will help thanks

 

[92AWDHX40]

How is your mbc hooked up? New rebuilt motor or just another motor? just curious. Does your turbo have shaft play?

 

[Gasolinebaptism]

Sounds like you should get a new boost gauge, cause you should be pulling more that 8lbs of vacuum at idle. And, figure out why link is pulling so much timing.
That's what it sounds like to me. What do your spark plugs look like? do you have a wideband? What are your typical readings?

 

[BLKGSX23]

Yeah prob need to check my boost gauge since link is reading vacuum of 20psi...MBC is splitted with the BOV and Intake Mani! And the turbo has just a little in and out shaft play nothing crazy though! Im on E85 and going Wot the wideband usually reads 12.5 to 13.0.. But it always smells like its running super rich after cleaning my injectors the last time I pulled them!