Prevalance of failure of stock FPR? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 04-29-2010, 11:25 PM   #1
Elite Member
Thread Starter
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default Prevalance of failure of stock FPR?

It looks like out of the blue over the last 3 months my AFR's have become on average 1 - 1.5 points leaner and I can feel it, especially at idle.

Maybe because its the summer, but I want to eliminate the potential that it is the FPR. The car has 30k miles on it so I doubt its the fuel pump.

While I know its not catastrophic and can be easily remedied by a table update, I am paranoid because I dont remember if I had modified my tables for this same exact issue before or not.

Are there any known cases or patterns of failing stock fuel pressure regulators on turbocharged miatas?

Last edited by Saml01; 04-29-2010 at 11:41 PM.
Saml01 is offline   Reply With Quote
Old 04-30-2010, 03:55 PM   #2
Elite Member
iTrader: (12)
 
Join Date: Jan 2007
Location: Hermosa Beach, CA
Posts: 2,575
Total Cats: 11
Default

not that I know of, you could test the rail pressure tho to make sure.
cardriverx is offline   Reply With Quote
Old 04-30-2010, 04:57 PM   #3
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,892
Total Cats: 1,792
Default

fuel filter?
Braineack is offline   Reply With Quote
Old 04-30-2010, 05:54 PM   #4
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,367
Total Cats: 1,331
Default

I popped one a while ago. It happened really quickly while I was tuning. I did a couple of pulls and noticed the AFRs were half a point leaner suddenly, and then I started a pull and it pegged at 17:1 as soon as I entered boost. I nursed it home at 15-16:1. Pinched the return line and the pump was fine, so I swapped FPRs and it solved the problem.

It happened right after I installed a DIY dual feed rail, I swapped back to a stock rail after that. No idea whether it's coincidence or a shaving I missed or what.
Savington is offline   Reply With Quote
Old 04-30-2010, 09:57 PM   #5
Elite Member
Thread Starter
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Quote:
Originally Posted by cardriverx View Post
not that I know of, you could test the rail pressure tho to make sure.
Id need a gauge for this yea?

Quote:
Originally Posted by Braineack View Post
fuel filter?
At 30k miles?

You really think it could do that.
Saml01 is offline   Reply With Quote
Old 04-30-2010, 10:26 PM   #6
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,892
Total Cats: 1,792
Default

pull the vacuum line off the FPR, if there's fuel there you know it's bad.
Braineack is offline   Reply With Quote
Old 05-02-2010, 11:49 PM   #7
Elite Member
Thread Starter
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Nice, I will do that ASAP.

Should I do it with the car running or with the car off?

Thanks Scott.

Last edited by Saml01; 05-03-2010 at 12:36 AM.
Saml01 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 12-13-2017 10:04 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM


Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:04 PM.