You guys sure its not the ecu possibly cutting the pressure to the HPFP? (Possibly through some retard/knock?)
ie. nothing wrong with the fuel pump rather the ecu fuel cutting.
Printable View
You guys sure its not the ecu possibly cutting the pressure to the HPFP? (Possibly through some retard/knock?)
ie. nothing wrong with the fuel pump rather the ecu fuel cutting.
Where are you? I have fitted internals and pumps on a few of these things lol
knock = richening of AFR's and pulled ignition timing, the opposite of that happened
his go stupidly lean (14.7 @ 14psi of boost = :eeksign:)... and 150psi fuel pressure on a DI motor is stupid low
the ignition timing also went all over the place, and the throttle plate slammed itself shut + wgdc went to 0, these are signs of the ECU going "oh crap, fuel pressure drop"
he also stated that there was 0 knock in the logs, and it was removed cause it showed nothing, and needed screen real estate for the picture
EDIT: i have a log of knock on 24psi if you really want proof :p my fuel pressure stayed ~1800psi
Ultimate tunes do quality work although u wouldn't think so by looking at the place there dunny looks like the dunny from Trainspotting LOL
thanks, chef, will give them a call tomorrow.
there you go @pural001 :D
be about $450 shipped to your door for autotech's + spark plugs
This is the issue I had with my car around the 50k mark, many years ago.
'06 3MPS.
HPFP (or fuel pump booster as told to me) had died, but took a rolling dyno and 3 days of sensor testing to find out what was wrong. I drove my car for around 20k before the problem got diagnosed, so no BIG BANG from my car. Basically, fitted another stock part bought cheap from a mate who works at Mazda in parts division. Thankfully, worked great ever since, no hesitation, no problems.
It cuts out just as boost kicks in, often on mid-range throttle, then goes into what I could only describe as maintenance mode until throttle is released and normality restored. Strange, but yeah. Sounds identical.
You can go an upgraded version if you want, I didn't because they were only just new at the time and I had no money to mod the car.
I had a fouled plug. Replaced and it got better but persisted. Replaced hpfp and happy days.
Sent from my S4 while I'm tappin dat' glass.
Thanks @EdgeAutosport.com
Just placed an order
regards, Aaron
Hey Guys,
I may have found the section in my logs that line up with the hesitation issue. The log is now highlighted in red where this occurs. Would you mind taking a look and suggesting possible fixes? The car runs slightly lean when coming on boost as AFR's hit the 15's and a small amount of knock is detected. This is not something I can repeat and happens randomly. I need to also state that it is not a WOT problem and happens when just driving around normally. The car seems to lose power for a second or two but if I do the same thing again a minute later its fine.
https://www.dropbox.com/s/yfwqkv96ho...SModified.xlsx
To date i've:
*Replaced and gapped plugs
*Replaced oil and oil filter
*Stretched coil pack springs
*Changed air filter
*Cleaned MAF sensor
*Bought Cobb AP and am running the Stage 1 98 tune
*Done a MAF calibration
*Installed Grimmspeed boost controller
It doesn't appear to be fuel pump related but next I plan to get the Autotech internals anyway as a precautionary measure
I appreciate any advice you can give as i'm stumped
Dan