Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > S Chassis

S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


Reply
 
Thread Tools Display Modes
Old 10-11-2019, 12:01 AM   #1
ArcherV2
 
Join Date: Sep 2019
Location: Toronto, Canada
Posts: 5
Trader Rating: (0)
ArcherV2 is an unknown quantity at this point
Feedback Score: 0 reviews
S14 SR20DET Boosting Issues

Just purchased an S15 Spec S with an S14 SR20DET Swap into it. It's running a Tomei D1 ECU with a funky mid-mount IC setup and remote HKS BOV but other than that relatively stock.

The trouble starts as I start to build boost, around 3.5K RPM @ wide open throttle, the car begins to throttle itself back and not want to boost anymore. My boost gauge works itself up to 0.5 KG and then sits there while the car begins to make a noise I can only type out as "brbrbrbrbrbrbr" while I feel an almost complete loss of acceleration. This happens in all gears, working my way through the gears at 50 - 60% throttle has no issues. It's only under heavy throttle that the problem appears.

Things I've checked:
  • Examined and cleaned the MAF
  • Replaced spark plugs and ensured coils are seated
  • Checked my IC piping and hoses for any obvious leaks/cracks

See my engine bay below!

ArcherV2 is offline   Reply With Quote
Sponsored Links
Old 10-11-2019, 06:38 AM   #2
S14rebuild
Zilvia Junkie
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 413
Trader Rating: (3)
S14rebuild has much to be proud ofS14rebuild has much to be proud ofS14rebuild has much to be proud ofS14rebuild has much to be proud ofS14rebuild has much to be proud ofS14rebuild has much to be proud ofS14rebuild has much to be proud ofS14rebuild has much to be proud ofS14rebuild has much to be proud ofS14rebuild has much to be proud ofS14rebuild has much to be proud of
Feedback Score: 3 reviews
Check wastegate.....and or boost leaks
S14rebuild is offline   Reply With Quote
Old 10-12-2019, 12:22 AM   #3
Dboyizmlg
Zilvia FREAK!
 
Dboyizmlg's Avatar
 
Join Date: Aug 2011
Location: SoCal (I.E.), San Berdino, Colton, Redlands
Posts: 1,589
Trader Rating: (16)
Dboyizmlg is on a distinguished road
Feedback Score: 16 reviews
Check actuator and make sure you have the clamp that holds the rod in place.

Also check you MAF, sounds like it can be MAF related.
Check for proper voltage
Dboyizmlg is offline   Reply With Quote
Old Today, 09:48 AM   #4
ArcherV2
 
Join Date: Sep 2019
Location: Toronto, Canada
Posts: 5
Trader Rating: (0)
ArcherV2 is an unknown quantity at this point
Feedback Score: 0 reviews
Quote:
Originally Posted by Dboyizmlg View Post
Check actuator and make sure you have the clamp that holds the rod in place.

Also check you MAF, sounds like it can be MAF related.
Check for proper voltage
MAF has been removed and cleaned, this was my initial thought, I've already replaced the plugs but no improvement.

I'm being told it sounds more and more like a boost cut and I'll have to take a look at the actuator or potentially look at getting a tune.
ArcherV2 is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 05:06 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™