register gallery
 

Go Back   Mazdaspeed Forums >
MAZDASPEED SECTION
>
Mazdaspeed 3/6 MZR Gen1 Forums (2006-2009)
> MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection

MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection Have a CDFP fuel pump question? Do you want to add Nitrous or Water Injection to your Mazdaspeed 3/6 ? Please come on in!


Welcome to Mazdaspeed Forums .

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

*When you join MSF as a registered user, there will be No Ads.

*Registered Members get access to the Off Topic Area of the Forum

*Registered Members have an opportunity to upgrade their accounts to VIP, which brings a host of goddies for supporting MSF such as Raffles, Additional Forum Access, More PM Storage, The ability to upload more Images and many other enhancements.

*Registered members also get access to the live chat box!
Reply
 
Bookmark and Share LinkBack Thread Tools Search this Thread Display Modes
 Old 11-14-2017, 10:08 PM   #1
 
riflex's Avatar
 
Join Date: Dec 2014
Location: VA
Posts: 53   (View Stats)
iTrader: (0)
Rep Power: 46
riflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to behold
Thanks: 22
Thanked 13 Times in 9 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
(Thread Starter)
Not Ranked  0 score     
Default FUEL PRESSURE HELP

So after searching and reading some threads on here, im still confused on what could be causing my fuel pressure to drop. I am 90% sure it is the relief valve that is the culprit but my symptoms are to inconsistent to be sure.

Im pretty much fully bolted, one step colder plugs gapped to .28, with 2 gallons of E per full tank (E15 mix?). Been running autotech internals for over a year now with no problems until now.

Sometimes (not all the time) during cold start, it will idle at 500 rpm with low fuel pressure around 250 psi. After a quick tap of the throttle, everything goes back to normal. Also, ive noticed a couple times during WOT, the car will hesitate at high rpms and studder/pop.

Today, when starting the car, i noticed a bad clicking/clanking from the HPFP. I performed the relief valve test after a cruise to my parents house. I turned the engine off and pressure slowly started to drop to 40-50psi. I WAS SURE it was the relief valve after seeing this. I went back inside my parents house and a couple hours later left to go home. When I arrived home, i decided to perform the same test. However, this time, the pressure held and continued to climb as people stated it normally should.

Does this mean it is starting to fail? OR is it something different like the ITFP or internals?
riflex is offline   Reply With Quote
 Old 11-15-2017, 02:42 AM   #2
 
alden's Avatar
 
Join Date: Oct 2014
Location: sudbury ON, Canada
Posts: 376   (View Stats)
iTrader: (1)
Rep Power: 60
alden has a brilliant futurealden has a brilliant futurealden has a brilliant futurealden has a brilliant futurealden has a brilliant futurealden has a brilliant futurealden has a brilliant futurealden has a brilliant futurealden has a brilliant futurealden has a brilliant futurealden has a brilliant future
Thanks: 76
Thanked 34 Times in 29 Posts
Groans: 0
Groaned at 2 Times in 2 Posts
Not Ranked  0 score     
Default

Originally Posted by riflex View Post
So after searching and reading some threads on here, im still confused on what could be causing my fuel pressure to drop. I am 90% sure it is the relief valve that is the culprit but my symptoms are to inconsistent to be sure.

Im pretty much fully bolted, one step colder plugs gapped to .28, with 2 gallons of E per full tank (E15 mix?). Been running autotech internals for over a year now with no problems until now.

Sometimes (not all the time) during cold start, it will idle at 500 rpm with low fuel pressure around 250 psi. After a quick tap of the throttle, everything goes back to normal. Also, ive noticed a couple times during WOT, the car will hesitate at high rpms and studder/pop.

Today, when starting the car, i noticed a bad clicking/clanking from the HPFP. I performed the relief valve test after a cruise to my parents house. I turned the engine off and pressure slowly started to drop to 40-50psi. I WAS SURE it was the relief valve after seeing this. I went back inside my parents house and a couple hours later left to go home. When I arrived home, i decided to perform the same test. However, this time, the pressure held and continued to climb as people stated it normally should.

Does this mean it is starting to fail? OR is it something different like the ITFP or internals?
Odd that it's intermittent. When I do the test, mine always drops to 40-50 psi, however I have no weird symptoms other than that to speak of. Car runs totally fine otherwise.
alden is offline   Reply With Quote
 Old 11-15-2017, 03:11 AM   #3
 
riflex's Avatar
 
Join Date: Dec 2014
Location: VA
Posts: 53   (View Stats)
iTrader: (0)
Rep Power: 46
riflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to behold
Thanks: 22
Thanked 13 Times in 9 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
(Thread Starter)
Not Ranked  0 score     
Default

Those are the only symptoms I have noticed. During cruise, car seems to hold pressure fine though i do not know what normal cruising psi should be at. ill try to grab some data logs today
riflex is offline   Reply With Quote
 Old 02-14-2018, 09:56 AM   #4
 
riflex's Avatar
 
Join Date: Dec 2014
Location: VA
Posts: 53   (View Stats)
iTrader: (0)
Rep Power: 46
riflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to beholdriflex is a splendid one to behold
Thanks: 22
Thanked 13 Times in 9 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
(Thread Starter)
Not Ranked  0 score     
Default

so after grabbing my logs. my fuel pressure seems pretty constant. however im still getting some studder/ predetonation at WOT. could this be injector seals? or hpfp internals seizing? not getting any cel's
Attached Files
File Type: csv datalog1x.csv (7.8 KB, 1 views)
File Type: csv datalog2x.csv (9.8 KB, 1 views)
File Type: csv datalog3x.csv (6.5 KB, 0 views)
riflex is offline   Reply With Quote
 Old 02-14-2018, 10:50 AM   #5
 
Thor Hammer's Avatar
 
Join Date: Jun 2015
Location: Santa Cruz, CA.
Posts: 1,297   (View Stats)
iTrader: (0)
Rep Power: 243
Thor Hammer is the leader of the worldThor Hammer is the leader of the worldThor Hammer is the leader of the worldThor Hammer is the leader of the worldThor Hammer is the leader of the worldThor Hammer is the leader of the worldThor Hammer is the leader of the worldThor Hammer is the leader of the worldThor Hammer is the leader of the worldThor Hammer is the leader of the worldThor Hammer is the leader of the world
Thanks: 664
Thanked 398 Times in 316 Posts
Groans: 102
Groaned at 2 Times in 2 Posts
Not Ranked  0 score     
Default

Pull the pump apart and inspect the O-rings. 2 years of E85 and perhaps there is a tiny bit of black death going on. Are you using the right oil for running E85?

I'm no expert but could also be sticky spill valve. Here is a thread for reference:

Resolving HPFP corn woes (black death/sticking spill valve)

Also, check your ground on your pump along with the connector.
__________________
2007 MS6- H&R Coilovers/ C-PE Catted DP/Corksport HPFP Internals/ AEM CAI/ ETS TMIC/ CPE Austenite Dual CBE/ CPE TIH/ Synapse Synchronic/ Freektuned/ AP Short Shifter/ AWR RMM and OEM TMM with CS Inserts/ Southbend Stage 2 Endurance/Stop Tech Slotted Rear and DBA T3 4000 Series Front with EBC Reds/CPE xFlex Rear Diff Mount/ Whiteline Rear Sway Bar/DSS Level 2.9 Rear Axles

Waiting for Install: BNR S3/HTP 3.5 Intake/Damond OCC/ CS Injector Seals/ WMI/MAPerformance Rev3 Intake Manifold
Thor Hammer is offline   Reply With Quote
 Old 02-14-2018, 01:00 PM   #6
 
flapjack's Avatar
 
Join Date: Feb 2017
Location: Indiana
Posts: 102   (View Stats)
iTrader: (0)
Rep Power: 20
flapjack is a name known to allflapjack is a name known to allflapjack is a name known to allflapjack is a name known to allflapjack is a name known to allflapjack is a name known to all
Thanks: 21
Thanked 12 Times in 12 Posts
Groans: 2
Groaned at 0 Times in 0 Posts
Not Ranked  0 score     
Default

Originally Posted by riflex View Post
Im pretty much fully bolted, one step colder plugs gapped to .28, with 2 gallons of E per full tank (E15 mix?).
2 Gallons of E85 per tank with the rest being 93 oct is more than E15 unless you are mixing it with gas that is ethanol free. More like E21.

Are you even tuned for an E85 mix? Just looking at your logs I'm highly betting you aren't. Your timing is very low at the top end and your AFRs are so lean at WOT it makes my ass pucker up. If you aren't tuned for E85, stop putting it in your tank.

In your second log I can see where it hesitated at full throttle, that looks like an overboost induced fuel cut to me. Your boost spikes all the way up to 22.37 psi which is about the highest value the stock MAP sensor can read. When boost spikes higher than ~22.5 psi, the ECU cuts fuel to save the motor from a catastrophic overboost condition.

Boost spikes are common on the factory 2-port boost controller. At your modification level, you need to ease into the throttle more or upgrade to a 3-port set to run in interrupt.
__________________
2007 Sunlight Silver Mazdaspeed3

Engine:
\\ JBR Solid RMM \\ AWR PMM \\ TRZ TMM \\ JBR PCV OCC \\ COBB SRI & TIP \\ CPE 3.25" TMIC \\ TurboXS 3" Catless DP \\ 3" Resonated Midpipe Back \\ Autotech HPFP Internals \\ Ford Transit Van Spin-on Oil Filter Adapter \\ Full EGR Delete \\ Throttle Body Coolant Bypass \\ Corksport Injector Seals \\ Greddy Type FV BPV \\

Tuning:
\\Cobb AP V3\\ Stratified Stage 3 E30 Mix S-OTS \\

Suspension/Brakes:
\\ BC Racing BR Type Coilovers \\ StopTech Street Pads F&R \\ Centric Drilled & Slotted Rotors \\ OZ Alleggerita Wheels 18x8 et48 \\
flapjack is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Low fuel pressure brandonnicholson MazdaSpeed 3/6 - Troubleshoot/Diagnostics 48 07-19-2013 10:46 PM
0 Fuel Pressure/0.0 Volts HPFP Voltage...but I do have fuel pressure?? AFcadet MazdaSpeed 3/6 - Troubleshoot/Diagnostics 24 08-03-2012 12:12 AM
Anyone else have 80,000 psi of DI fuel pressure? mdd5148 MazdaSpeed 3/6 - ECU Computer Tuning 10 09-03-2011 10:04 AM
More fuel pressure not enough? Enki MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection 36 06-21-2011 10:55 AM
Fuel pressure dip myms3 MazdaSpeed 3/6 - Troubleshoot/Diagnostics 15 05-03-2008 12:37 PM


All times are GMT -7. The time now is 02:38 AM.
Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
SEO by vBSEO ©2011, Crawlability, Inc.
vB.Sponsors
Template-Modifications by TMS
©Copyright 2008 ; 2014 Cymru Internet Services LLC | FYHN™ Autosports HQ
Ad Management plugin by RedTyger
Page generated in 0.27793 seconds with 24 queries