Jump to content
SAU Community

Recommended Posts

Was out driving my r33 S1 today when i noticed alittle miss under load every now and then. Thinking it was a typical coil pack issue i just took it easy.

It started to get worse and is clearly not a igntion issue, it apears to be fuel. Everytime i try to give it gas it hesitates but it will still idle?

End result was a tow truck ride home, and just to add insult to injury when i got it home it still runs and drives fine?!

This is a heavily modified rb25det but this has got me beat. Its never let me down before but reminds me of trying to drive it with a intercooler pipe blown off. (if that makes any sence)

Pump is still working, ecu tells me that the duty cycle on the injectors is normal. I did fuel up 30 minutes before i left but does not have the characteristics of dirty fuel...Somthing is failing when it gets hot, but what?!

Good brain teaser for the crew..

On a foot note, the only person that stoped to help me push the car off the road was a fellow skyline driver! Full respect mate.

Link to comment
https://www.sau.com.au/forums/topic/417535-mystery-fuel-issue/
Share on other sites

Was out driving my r33 S1 today when i noticed alittle miss under load every now and then. Thinking it was a typical coil pack issue i just took it easy.

It started to get worse and is clearly not a igntion issue, it apears to be fuel. Everytime i try to give it gas it hesitates but it will still idle?

End result was a tow truck ride home, and just to add insult to injury when i got it home it still runs and drives fine?!

This is a heavily modified rb25det but this has got me beat. Its never let me down before but reminds me of trying to drive it with a intercooler pipe blown off. (if that makes any sence)

Pump is still working, ecu tells me that the duty cycle on the injectors is normal. I did fuel up 30 minutes before i left but does not have the characteristics of dirty fuel...Somthing is failing when it gets hot, but what?!

Good brain teaser for the crew..

On a foot note, the only person that stoped to help me push the car off the road was a fellow skyline driver! Full respect mate.

My money is vapour lock

All symptoms sound like it

Depending in mods

Fuel boils in the lines or filter and the engine dies and wont restart for a while on hot days or lots or stop start driving

Next time it happens remove fuel cap and see if it starts that drops off over pressure in the tank

any leaks or water in the fuel does it

So does e85 fuel , ethanol and super hot days don't go together

Highly doubtful its vapour lock. Not with 40+psi behind it. Increasing the pressure raises the boiling point of liquids. And the pressure would push any vapourised fuel through the system quick smart.

narrowed it down this arvo, definatly fuel pump! Its got a bosch 040 in tank in it and over the past few days i had been thinking to myself that it seemed to be louder than normal??...took it for a drive today until it started playing up and i can hear the pump reving up and down all unstable.

So out it comes tomorrow!

Case closed,, thanks for the input guys

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Ok glad you clarified on the frenchy’s options , I was worried about if my oem hoses would fit the new compressor or not if I just bought the bracket/compressor kit ,  didn’t realize they also sold a larger full conversion kit. Hmm may just go oem in that case then to make it easy only because I plan to sell this car to upgrade to a 32 GTR or 34 GTT.
    • Right, here's a video of the basic operation at least.  This is what you can expect day to day when you turn the car on and it boots from standby.  The only thing from a media point of view I haven't gotten working is for it to autoplay plexamp when it turns on from standby (it works from cold boot) but that's more of a plexamp problem as it will autoplay other music players.  Also attached is my one stray cable.  It's part of the screen's wiring adapters but there's just nowhere for it to go in my car.  I've just now done a bit of research and found a matching port on a 2010-2014 head unit with BOSE.  Mine has no BOSE so that's that case pretty much closed I think.  Plugging in the Infiniti AC panel basically did nothing for me, so that's a dead end as well.  Next port of call is to mess with this CANBUS module and see what I can find from it.  I found this resource containing the DBC files for a 2010+ G37 : https://github.com/icecube45/Dash_InfinitiG37/blob/master/InfinitiG37.dbc I'll now have something to go from when I try to extract my CANBUS data so I can see if the HVAC Mode, Fan Speed, Temperature, etc. match and also the gear shifter position.  It's a pretty big assumption that it's just mismatched CAN signals but considering all the devices in the CAN network are talking to each other (AC can be fully adjusted just with no info on screen) it might be a safe one.  I will report back WhatsApp Video 2025-02-26 at 12.49.10.mp4
    • Thanks for that Paul.  Do you think if I posted a picture you'd be able to remember where it went? 
    • Sorry Duncan, I didn't get a notification for the replies.  Thanks for responding!  It's a full Android device, but does allow you to use CarPlay/AA as well.  This is the one I bought from NaviRS on AliExpress: https://www.aliexpress.com/item/1005006368602668.html?spm=a2g0o.order_list.order_list_main.111.59aa1802JDzQ0E - the 2K 8G-256G CAM variant but it seems to have gone up by £170 since I bought it!  My purchase was £307.14.   It's not the fastest thing in the world but performs perfectly adequately.  It stays on standby unless I disconnect the battery and let it power down, then it's just a fairly standard Android bootup time from cold.  The DSP Equaliser is very nice and made the standard stereo system sound pretty decent compared to the stock screen.  Perhaps I can take a video of it when I get a sec. It *allegedly* supports the reverse camera, but I'm yet to get that working.  It has options for reverse cam (a camera unit can be bought separately) or 360 cameras (also bought separately).  To be fair it doesn't seem to detect that the shifter was put into reverse but I'm working on a theory about this as well.  At the moment I'm going without which is a bit annoying considering the car is an absolute canal barge but so far I haven't caused any damage I'll grab a picture of the wire I'm missing later today when I can get outside.  My theory, by the by, is that not only is the head unit different, but the CANBUS network has different signals for the different years.  I think this because I have a spare AC panel from a newer Infiniti G37 (as opposed to my Nissan panel) which wouldn't control anything except the volume when I had it wired up with the stock system.  I'm going to throw it back in and see if the screen will respond to it.  I've just ordered an arduino CANBUS module so I can have a look at the signals going around the car and see if I can spot anything.  I'm thinking if I can work out what it's expecting vs what it's getting I might be able to translate and relay the signal back but so far just a theory anyway. I also found this on my travels, so far the only one that specifically matches my car: https://www.aliexpress.com/item/1005002822934280.html?spm=a2g0s.imconversation.0.0.33433e5fgttovi If you look at the picture of the before, it has the card reader slot, and the picture of the head unit is exactly the same as the one pictured in my original post.  I asked if they sell the cables separately but sadly they won't.  I didn't want to just buy this one because it's a super old Android version and only dual core - likely slow as hell. 
    • As above, you did refill the coolant and burp the system before running it again didn't you?
×
×
  • Create New...