429A low pressure deviation many new parts I'm at a loss. HELP!

[d21spike]

Originally Posted by madbim

Posting here for additional viability
This is cross posted on NA BMW Diesel Owners

429A low pressure deviation; many new parts I'm at a loss. HELP!

I've been chasing this issue on my 2013 35d for a while now, and cannot seem to figure it out. Currently have 107k miles, new water pump, thermostat, glow plugs, glow plug controller, vacuum res, vacuum controller, pressure converters and vacuum lines, boost hose seals, cleaned MAF.

• Boost seems low across entire range (although not sure what should be expected?)
  
• DDUMD Stage 1 tune sll stock hardware less EGR delete
• Trans tune from Rod
• 429A came back on my test run tonight, it sometimes feels laggy between 3000-3700RPM. Also for the first time I noticed 452A which appears to be a DPF related code.

UPDATES

• 7/21 - wifi endoscope ordered
• 7/22 - New MAP sensor ordered
• 7/22 - Log https://datazap.me/u/madbim/35d-7-22...zQ5SReAOw42URc
• 7/23 - Visually inspected valve cover gasket, no issues to note

Any help\guidance is appreciated.

Had this code the other day. Ended up finding the gasket for the egr cooler block off had blown out and exhaust pressure was escaping. Not saying this is your issue but something to look at.

[madbim]

Originally Posted by d21spike

Had this code the other day. Ended up finding the gasket for the egr cooler block off had blown out and exhaust pressure was escaping. Not saying this is your issue but something to look at.

Interesting, I have the Bimmertune EGR delete. No gasket was provided, but the block off plate is contoured. I'll inspect it again but looked good when I last looked it was good.

[d21spike]

Originally Posted by madbim

Interesting, I have the Bimmertune EGR delete. No gasket was provided, but the block off plate is contoured. I'll inspect it again but looked good when I last looked it was good.

Yeah in your case I'd suspect you would see soot mark going past the edge if there was leakage.