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2007, FK1, 1.4 DSI, Manual
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Discussion Starter · #21 ·
might sound daft but remove the fuel filler cap and try again just incase its airlocked somehow
sounds like your pump is triggering might just need primed if it ran dry while changing
does the car sound like its trying to start or just turns over
The car sounds like it's trying to start. I'll try the fuel filler cap tomorrow, thanks 馃榿
 

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2007, FK1, 1.4 DSI, Manual
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12 Posts
Discussion Starter · #23 ·
Sorry for the massive delay, had a busy few days but a lot has happened.

Getting the car started:
After removing the quick connector on the fuel line in the engine bay, no fuel was coming through, despite fuel coming out of the pump. I attached a piece of transparent hose to the fuel outlet on the pump to see if there were any issues. Lo and behold, there wasn't enough fuel pressure to get it through the hose. I knew this was an issue with o-ring placement on the pump, but I just couldn't get it tight. Eventually, I tried placing two o-rings in there (old and new), so the bottom one pushed the upper one into the socket. I could immediately tell it was in properly as it was difficult to remove again. The next day, I refitted the filter and it started first time 馃榿. I've attached a picture for clarity.
Gesture Finger Nail Thumb Wood


After fitting:
After driving around a bit today, I noticed the stuttering issue was annoyingly still present. After a while I got fed up, so when it started juddering, I just held the throttle at the point that was causing it. However, after holding it for ~ 5 seconds, an engine warning came on as well as a VSA 馃槵. Luckily, my mate was in the car with me, who has an OBD2 reader, so I carefully drove to his house to pick it up. The code
was as follows "P0339: Crankshaft Position sensor A circuit intermittent."
Watch Gesture Communication Device Finger Gadget

The VSA warning wasn't present after restarting the car, so I presume it was just because of the juddering.

We cleared the code and looked at the full system information. I noticed that the EGR Error percentage was at 99.2%, indicating that it's virtually dead. We took it for a spin while using the code reader to monitor the throttle position, engine load and fuel system.

When the stutter occurs, the engine load jumps to 100% regardless of what it was previously, with throttle position fluctuating slightly (although this may be the car juddering causing the throttle to physically push against my foot). The EGR error percentage remained at 99.2% for the whole time.

I also managed to keep the car stuttering for ~ 5 seconds and the engine warning light came on again. The same code (P0339) was present.

My hypothesis:
Based on the fact that the stutter only occurs when under load, I think that what happens is that due to the EGR valve not working correctly, when the ECU is attempting to fire it and hence expecting the extra gasses, when the gasses aren't present the engine spikes to 100% load to compensate, causing the judder. This would also line up with the fact that throttle response in the leadup to a judder feels extremely lacking.

I reckon the engine warning code is thrown up as due to the harsh juddering (feels almost like stalling a diesel, but for 5 seconds straight), there may be a loose connection on the sensor, momentarily causing a voltage fluctuation.

Moving forward:
My next move would be to purchase a new EGR valve, but seeing as it's 拢70 for a new one, I thought I'd consult you guys before doing it, as I don't want to mindlessly throw money at it, or ignore issues that may be more severe than I realise (i.e. the crankshaft sensor).

@peter_voly hopefully you find this useful, and if you've got any more questions feel free to shoot them my way, I'm happy to help 馃榿.
 

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Sorry for the massive delay, had a busy few days but a lot has happened.

Getting the car started:
After removing the quick connector on the fuel line in the engine bay, no fuel was coming through, despite fuel coming out of the pump. I attached a piece of transparent hose to the fuel outlet on the pump to see if there were any issues. Lo and behold, there wasn't enough fuel pressure to get it through the hose. I knew this was an issue with o-ring placement on the pump, but I just couldn't get it tight. Eventually, I tried placing two o-rings in there (old and new), so the bottom one pushed the upper one into the socket. I could immediately tell it was in properly as it was difficult to remove again. The next day, I refitted the filter and it started first time 馃榿. I've attached a picture for clarity.
View attachment 327607
that was my next suggestion.
pushing that pump into place against the new rings is tight, Honda say lube with clean engine oil, works a treat.
 

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Yeah bro nice info, I actually read somewhere that changing the gearbox fluid did some help too, and Im thinking of trying it since lately I noticed that the stuttering happens most of the times right after a gear change. Im not super knowledgable about cars, but since sometimes shifting to the 1st gear is pretty hard, I think it might be of use, just throwing these thoughts out there. Also curious about that egr valve change tho.. I read that in some cases that was the thing, also read something about oem coils.. Who knows man.
 

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2007, FK1, 1.4 DSI, Manual
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12 Posts
Discussion Starter · #26 ·
Yeah bro nice info, I actually read somewhere that changing the gearbox fluid did some help too, and Im thinking of trying it since lately I noticed that the stuttering happens most of the times right after a gear change. Im not super knowledgable about cars, but since sometimes shifting to the 1st gear is pretty hard, I think it might be of use, just throwing these thoughts out there. Also curious about that egr valve change tho.. I read that in some cases that was the thing, also read something about oem coils.. Who knows man.
The transmission fluid change does sound interesting, as do the coils. Only issue is I feel like this could quite easily become an infinite money pit, throwing things at it till it's fixed 馃槀. I'm probably going to order the EGR valve, I'll install it and see what the score is.
 
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