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PGM-FI

Airon

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Car
Accord Tourer gen8
Hi all, I’m hoping for a bit of advice please. I have a 2.2i dtec which had the dpf and egr mod and remap almost exactly a year ago. At the time, Fahad advised that the turbo actuator wasn’t operating fully, and that I had a low fuel rail pressure fault recorded, which I knew about, and hoped was fixed (it wasn’t).
I’d had the fuel rail pressure sensor and relief valve replaced, but I could repeat the fault just by hard acceleration in 2nd or 3rd. I then had the injectors tested… all good, the high pressure fuel pump tested… leaking… rebuilt, and an exchange turbo. None of this fixed the fuel rail pressure fault, so I did what I should have done in the first place (as Fahad suggested) and bought a complete fuel rail from a scrapper. Problem solved.
Then the PGM-FI came up. Code reader said glow plug 2 is open circuit. The glow plugs were less than 2 years old, so only changed that one. A couple of weeks later glow plug 3 is open circuit, so 1,3 & 4 were changed. Now plug 4 is showing o/c. The car starts and runs fine. The fault appears while running. It doesn’t go in to limp mode and clears after 4 starts. Are the glow plug resistances being monitored constantly? Is the signal multiplexed so I’m looking for a single bad connection? Is there a way to run a test in the workshop while flexing connections, hitting with a rubber hammer etc? My son in law is the technician and he has access to an OBD a tool (Snap-on), but not an HDS.
If you’ve read this far, thank you, and if you have any suggestions, they’d be most gratefully received.
 
Hi I think I remember you, I’m glad the fuel pressure problem is solved (although it sounds like you went the long way round lol)

If you’re still having an open circuit error after replacing the plugs, then it’s either down to you using a non genuine Honda plug, damaged plug or wiring. Yes the ecu is measuring resistance on the ignition cycle.
 
Thanks Fahad,
They’re Bosch glow plugs, though I suspect the main cause of the ‘long way round’ to fixing the fuel rail pressure fault was probably counterfeit Bosch parts. If it wasn’t such a trek, I’d have asked you to look at it and saved myself a lot of grief.
The advice is much appreciated.
 
Try swapping one of the plugs round to see if the fault follows. Then you’ll know if it’s the plug or wiring.
 
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