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N47D20 120d no start. Where to?

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Cold kills batteries; its the most profitable time of the year for battery suppliers for a reason.

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I think a new battery is in order either way. Its almost 10 years old, undersized and negative temperatures. I'll get a new Varta F18 from Battery Town tomorrow. Not a bad innings considering the average lifespan is 5 years according to forums. Doesn't seem to have IBS either. 

If this honestly fixes it, you'll hear the sigh of relief from your place. 

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At 10 years old and negative temps, I believe you’ve found your problem. Hope so.

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New Exide Extreme. 750 CCA, 80ah. 14 degrees outside. Ive checked the injectors are getting a signal. Back to the drawing board 😓

I got the fault codes below after connecting the battery and firing up ISTA. Weirdly, the 4 bottom codes look to have come up 2kms before it's final rest. The car is currently at 169,178kms and hasn't driven since the start of this saga. 

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I cleared them, disconnected ISTA, ignition off, attempted start of the car, connected ISTA, no fault codes showing now. But still, no start. 

I'm getting the exclamation mark and CEL when I press the ignition, but no fault codes on ISTA or the OBC (after I cleared them the first time).

That throttle body fault is bugging me. I ran through the ISTA diagnostics for it though and it all checked out OK. So maybe it's a battery disconnect/connect thing that upsets it? 

Unsure where to go from here. Compression check and timing? Biggish jobs with having to remove the injectors and the valve cover (after removing all the stuff on top).

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Service plan for the throttle actuator fault code, assuming it wasn't battery disconnect related. 

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Assuming you didn't buy from a dealer?

That last vid: It still winds with no real compression spikes intially (like the plugs are out, or the valves aren't closing, soz!), then sounds not regular enough for a 4 cylinder cranking at that speed. 250 rpm should kind kind of enthusiastic.

can you check the timing via the hole from the cam sensor and the crank mark?

I still reckon a compression issue: head gasket massively blown, bent valves or a valve train issue like a slipped chain or cam pulley. Timing off may explain the camshaft code too, because the DME may not be seeing the signal within the required window of crank sensor signals, so treats it as implausible.

Pretty sure you'll be taking the rocker cover off at least ☹️

I'd be a little concerned about additional damage if it did start...

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Yea private sale. And I don't *think* she put me wrong. My friend collected it and had no issue for the couple of days he had it. No chain noise. Quiet as a diesel can be. 

I'd be interested to hear what a N47 sounds like with the injectors unplugged. I feel like it's cranking fine considering there's nil help from combustion. 

I'll prep for valve cover off 🤦 Like I said earlier, I don't feel like it's anything catastrophic because it drove 450kms with stops in between, no worries. No laziness to it at all and ran fine. I'm sure it's a sensor/DDE/electrical fault. Whether that's induced by the negative temperatures or pure bad luck, who knows. 

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Are your injectors activating while cranking? The DDE will not pulse injectors until a specific fuel rail pressure is reached and you  mentioned  a fuel leak in an earlier post. Is it possible you have a air in the fuel system preventing the target pressure being achieved? 

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3 hours ago, Lubed said:

Are your injectors activating while cranking? The DDE will not pulse injectors until a specific fuel rail pressure is reached and you  mentioned  a fuel leak in an earlier post. Is it possible you have a air in the fuel system preventing the target pressure being achieved? 

Target pressure is being struck. Voltage spiking at injectors when turning over. 

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48 minutes ago, F30N20 said:

Did you ever get this problem sorted out Cam?

Unfortunately not. The plan is to replace the leaky injector and the throttle body that keeps throwing codes (I don't think this will fix it) and if it still won't start, it's getting trailered to an independent euro place in Queenstown. I don't have the space/time/patience to continue fault finding to the point of pulling cam covers to check timing etc. 

I'll have to suck it up and accept the bill! Support local right... 😅

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