fuel pump primes 17 times then stops, engine won't run

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Expand view Topic review: fuel pump primes 17 times then stops, engine won't run

Re: fuel pump primes 17 times then stops, engine won't run

by John Scherrer » Tue Nov 06, 2018 2:03 pm

Glad you found it !

.. especially a problem if you track it in hot weather and don't do a couple of slow down laps .. :wize:

Re: fuel pump primes 17 times then stops, engine won't run

by smokin » Tue Nov 06, 2018 1:48 pm

Mines been sheathed in fibreglass based heatshield and wrapped with heat reflective tape for this very reason. Also have a clip securing it so it can't get close to the hot bits. This has happened to a few owners now but not with your symptoms. Must have been fun to find

Re: fuel pump primes 17 times then stops, engine won't run

by Toilet Duck » Tue Nov 06, 2018 1:12 pm

Just a quick update.....

I'll spare every detail, but in the end the problem was traced to............. the lamda sensor wiring; it had melted and fused together causing a short. New section of loom going on, this time routing different to the factory routing which passes extremely lose to the exhaust manifold, hence why it melted.

Cheers :vroom:

Re: fuel pump primes 17 times then stops, engine won't run

by Toilet Duck » Thu Sep 20, 2018 6:54 pm

Sure, will update thread when I know anything :tu:

Re: fuel pump primes 17 times then stops, engine won't run

by smokin » Thu Sep 20, 2018 4:25 pm

That make/model supports all OBD II protocols so no green light suggests ECU isn't able to establish comms. I suspect the ECU is rebooting every few seconds (given the almost continuous attempts to prime the pump) and so is not getting far enough in its startup procedure to do comms. Could be something as simple as a bad ECU ground or, sadly, could be a knackered ECU. Please let me know what CPL discover

Re: fuel pump primes 17 times then stops, engine won't run

by Toilet Duck » Thu Sep 20, 2018 4:02 pm

Here is a pic of my dongle:

Image

Only the first light (POWER) illuminates when plugged into the Atom. I have two of these adaptors and they both do the same.

Cheers

Re: fuel pump primes 17 times then stops, engine won't run

by smokin » Thu Sep 20, 2018 3:53 pm

Toilet Duck wrote: ↑Thu Sep 20, 2018 3:10 pm ... so I don't know if the Atom uses some unique protocol or if my set up just isn't compatible.
I didn't have any problem with my obd setup, it works the same on the Atom as other cars I've hooked up to. I suspect it's a symptom of the fault. My dongle has lights so you can see it's connected sucessfully to the ECU, do yours?
Toilet Duck wrote: ↑Thu Sep 20, 2018 3:10 pm Ironically my Atom is booked into CPL in a couple of months for some major work, including a FlashPro. I think I have exhausted my DIY skills so I think I'll get in touch with them as they are Hondata experts and try and get this looked at beforehand. My suspicions is that this is an ECU related problem.
CPL will have ECUs will full diags to swap in to narrow down the problem. Experts in Hondata with plenty of Atom experience, probably better placed to sort your problem than the factory in this instance.

Re: fuel pump primes 17 times then stops, engine won't run

by Toilet Duck » Thu Sep 20, 2018 3:10 pm

Just tried two blue tooth dongles and TorquePro on my tablet and unfortunately the tablet can't connect to the blue tooth reader. I've previously used this set up on numerous everday type cars and it's always worked, so I don't know if the Atom uses some unique protocol or if my set up just isn't compatible.
smokin wrote: ↑Wed Sep 19, 2018 8:55 pmSoftware is freely available but only of use if you have the kpro board in the ECU instead of the factory K100. Had CPL fit the board and TDi North send me the file from when they mapped my car.
Ironically my Atom is booked into CPL in a couple of months for some major work, including a FlashPro. I think I have exhausted my DIY skills so I think I'll get in touch with them as they are Hondata experts and try and get this looked at beforehand. My suspicions is that this is an ECU related problem.

Cheers

Re: fuel pump primes 17 times then stops, engine won't run

by smokin » Thu Sep 20, 2018 6:29 am

If OBD doesn't give any clues and if you haven't already tried, might be worth powering off/on the ECU. Using master cut-off if you have one or disconnecting earth strap from battery, leave it off for 10 mins or so, reconnect and try it.

Re: fuel pump primes 17 times then stops, engine won't run

by smokin » Wed Sep 19, 2018 8:55 pm

Toilet Duck wrote: ↑Wed Sep 19, 2018 7:51 pm I take it thats from your own kpro software? Is that freely available for diagnosis/checking ECU, or only available if you purchase an upgrade or get the ECU mapped etc?
Software is freely available but only of use if you have the kpro board in the ECU instead of the factory K100. Had CPL fit the board and TDi North send me the file from when they mapped my car.
Toilet Duck wrote: ↑Wed Sep 19, 2018 7:51 pm Also, something I've just discovered, whilst the fuel pump is dancing on/off, when I press the throttle pedal you can hear it actuating the drive by wire butterfly in the throttle body. Once the fuel pump has primed 17 times and shuts down, the throttle pedal no longer operates the butterfly, it goes dead. I'm starting to think that this is an ECU issue....
I concur. If it's throwing a code then your £15 dongle plus an app like TorquePro should show it

Re: fuel pump primes 17 times then stops, engine won't run

by Toilet Duck » Wed Sep 19, 2018 7:51 pm

smokin wrote: ↑Wed Sep 19, 2018 7:30 pm Also, the ECU just primes the pump for a set period of time rather than continuosly until pressure or some other signal is received
I take it thats from your own kpro software? Is that freely available for diagnosis/checking ECU, or only available if you purchase an upgrade or get the ECU mapped etc?

Also, something I've just discovered, whilst the fuel pump is dancing on/off, when I press the throttle pedal you can hear it actuating the drive by wire butterfly in the throttle body. Once the fuel pump has primed 17 times and shuts down, the throttle pedal no longer operates the butterfly, it goes dead. I'm starting to think that this is an ECU issue....

Re: fuel pump primes 17 times then stops, engine won't run

by Toilet Duck » Wed Sep 19, 2018 7:48 pm

smokin wrote: ↑Wed Sep 19, 2018 7:17 pm Maybe the ECU is having an issue and rebooting/retrying 17 times before giving up. Do you have an OBD port? or an LED for check engine light? Might be worth checking to see if ECU is bitching about anything.
I only have a crappy £15 OBD blue tooth adapter, but I will give it a go. No other LED's etc

Re: fuel pump primes 17 times then stops, engine won't run

by smokin » Wed Sep 19, 2018 7:30 pm

Also, the ECU just primes the pump for a set period of time rather than continuosly until pressure or some other signal is received
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Re: fuel pump primes 17 times then stops, engine won't run

by smokin » Wed Sep 19, 2018 7:17 pm

Maybe the ECU is having an issue and rebooting/retrying 17 times before giving up. Do you have an OBD port? or an LED for check engine light? Might be worth checking to see if ECU is bitching about anything.

Re: fuel pump primes 17 times then stops, engine won't run

by Toilet Duck » Wed Sep 19, 2018 7:06 pm

Just found it in my Owners Manual!

This is strange, the relay that clicks with the fuel pump is actually the "Throttle Pedal Relay." I assumed it must be a relay for the fuel pump due to clickin/energising in sync 17 times with the fuel pump.

I wonder if this is linked to my issue somehow?

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