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Accord iDTEC "misfires" and cuts off.


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#21 F6HAD

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Posted 15 August 2017 - 08:47 AM

Drop me a line, I can probably help if you can manage without your ecu for a few days.
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#22 Acco_idtec

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Posted 16 August 2017 - 04:18 PM

Drop me a line, I can probably help if you can manage without your ecu for a few days.

Thx, I really appreciate your offer but I guess now it's a bit too late for that, as the car died properly this time while I was trying to perform a test drive. Afterwards I got the engine running (but very roughly), so the car got carried away by a local towing company, and is now taken to a Honda dealer service.

Now I'll just have to wait for the outcome of their tests. I'll keep you posted once I know something new.

Edited by Acco_idtec, 16 August 2017 - 04:21 PM.


#23 scotsgent

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Posted 16 August 2017 - 06:32 PM

I had a similar problem.

 

Turned out to be a poor electrical connection to the in-tank primary pump.  Once this connection was re-made, everything was fine.

 

you have to remove the rear seat squab to get at the connections at the pump, but its easy enough.

 

Honda tried to renew the fuel filter and also the high pressure pump (they were fixated on this being the problem).  Only when I intervened and asked them to start at the beginning of the fuel delivery chain was the problem then immediately spotted.  Sometimes the simplest possibility is worth trying.

 

Cheers,  Terry


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#24 Acco_idtec

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Posted 22 August 2017 - 06:57 PM

Got a call from Honda today. They weren't able to get out any DTC's either. But when they did the fuel pressure test with HDS, the engine didn't reach the target pressure and stalled. So after all, the main suspect is the high pressure pump.

It's worth serious money.. completely new unit from Honda costs about 2200€. But they also think it's a very hairy price, so they are now seeking for a rebuilt one from Bosch via their contacts. The price should settle around ~1000€.

I know I could find one from Ebay or Japan for a cheaper price, but as it's not 100% sure that the pump is the cause, I'll hand the part purchasing process to them.

Just have to wait and see.

#25 F6HAD

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Posted 22 August 2017 - 07:22 PM

I've had an idtec in with a failing fuel pressure relief valve that had similar symptoms. I would suspect that first. We changed the whole fuel rail from another donor car.
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#26 Acco_idtec

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Posted 22 August 2017 - 09:22 PM

I've had an idtec in with a failing fuel pressure relief valve that had similar symptoms. I would suspect that first. We changed the whole fuel rail from another donor car.


Actually, I also mentioned them about the relief valve, but they seem to be fixated on the hp-pump, just like in scotsgent's case.

#27 Acco_idtec

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Posted 08 September 2017 - 03:38 PM

Some update. So, first they changed the high-pressure pump. It made no difference. Next they changed the in-tank pump, which also has somekind of "rough filter" built in.

After this, the problems with low fuel pressure were fixed, but the engine was still misfiring and hesitating. Now they've spotted that the injector of cyl. 2 drops out of range when the engine is misfiring.

So it has been pretty complicated. Now we are waiting for a new injector. Hopefully the engine will finally run correctly after they change it..

Edited by Acco_idtec, 08 September 2017 - 03:39 PM.


#28 freddofrog

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Posted 08 September 2017 - 04:44 PM

Surely they should have found that the first time they connected their HDS  :o


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#29 Jon_G

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Posted 08 September 2017 - 06:03 PM

Disappointing that they wrongly replaced the diesel pump. Hopefully you'll get a refund for that?



#30 Acco_idtec

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Posted 08 September 2017 - 06:23 PM

Surely they should have found that the first time they connected their HDS :o


That's what I'm thinking too.. I Guess at the beginning they were just concentrated on the pressure test, rather than having a decent test drive with live data.

Though, I think that one faulty injector doesn't "kill" the engine for 30mins like in this case. So, the reason could be both, the injector and the primary in-tank pump.

#31 Acco_idtec

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Posted 08 September 2017 - 06:44 PM

Disappointing that they wrongly replaced the diesel pump. Hopefully you'll get a refund for that?


Well, they are going to leave the overhauled high-pressure pump fitted, although it wasn't the reason for this. They have admitted, that this has been the most mysterious 8gen diesel they've had yet. So a plenty of labour has been done through trial & error. Therefore I'll propably get a refund on most of the working hours spent on this and a partial refund on the overhauled pump. Let's see.

#32 F6HAD

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Posted 08 September 2017 - 08:31 PM

Have you actually changed what I suggested in the first place? The fuel rail with relief valve..
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#33 Acco_idtec

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Posted 10 September 2017 - 08:52 AM

Have you actually changed what I suggested in the first place? The fuel rail with relief valve..


Nope. 😀 Both the injector leak-back test, and testing the relief valve were on my to-do list, before this f*cker decided to die on the freeway few weeks ago. So then I had to get it towed away, and my insurance leaves me free of cost, only if I get it towed to a repair shop. So the car has been at Honda since then.

So for a few weeks I haven't been able to do anything else, but to get disappointed multiple times and wonder around with my back-up car, '96 Carina estate 😀

#34 freddofrog

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Posted 10 September 2017 - 09:31 AM

my back-up car, '96 Carina estate

probably more reliable LOL


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#35 Acco_idtec

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Posted 10 September 2017 - 09:33 AM

probably more reliable LOL


Haha, Certainly is!
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#36 Acco_idtec

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Posted 14 September 2017 - 06:38 PM

Oh well. I got the car back yesterday. Seems like they finally got it sorted out.

So after all, both, the cyl. 2 injector & the primary in-tank pump were faulty. Even Honda couldn't tell for 100% sure which one was originally the cause for this, but the main thing is that it's running again!

Hopefully this topic helps future troubleshooters. Big thanks to everyone who took part in this conversation!

Edited by Acco_idtec, 14 September 2017 - 06:42 PM.

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#37 F6HAD

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Posted 14 September 2017 - 07:36 PM

Glad it's fixed. Never heard of this failure yet on these cars. Maybe it's been misfuelled at some point in its life.
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