Non-running 2010 JSW

[Tdimrtwo]

looking at a ‘10 Jetta sportwagen with about 230k miles. Owner says VW America has replaced entire fuel and emissions system under warranty, but now broke down again. (HPFP, turbo, injectors, dpf twice lift pump, etc.). Is this typical? I’ve had almost the opposite experience with my 2015 GSW WITH 205k miles. It overheated once, had to change a clockspring, and CEL cycles on and off with a dpf regen frequency code, and that’s it. Changed oil every 10k, timing belt at 110k, and dsg fluid when recommended, nothing else. Am I just really lucky, is he really unlucky, or is the crua just a way better engine than the CJAA? If I get it, would it be a good candidate for a dpf/egr delete?

 

[Timma100]

looking at a ‘10 Jetta sportwagen with about 230k miles. Owner says VW America has replaced entire fuel and emissions system under warranty, but now broke down again. (HPFP, turbo, injectors, dpf twice lift pump, etc.). Is this typical? I’ve had almost the opposite experience with my 2015 GSW WITH 205k miles. It overheated once, had to change a clockspring, and CEL cycles on and off with a dpf regen frequency code, and that’s it. Changed oil every 10k, timing belt at 110k, and dsg fluid when recommended, nothing else. Am I just really lucky, is he really unlucky, or is the crua just a way better engine than the CJAA? If I get it, would it be a good candidate for a dpf/egr delete?

Did he elaborate what caused it to breakdown this last time? Turbo and DPF failure, extended oil change intervals, and or incorrect oil. (Although you'd likely get 100K miles out of a DPF even with the right oil... HPFP is a roll of the dice combined with fuel filter change interval, fuel quality (Excess water in the fuel combined with infrequent filter changes will lead to water in the HPFP, causing corrosion and failure). Failure to include Diesel fuel additives such as HotShots LX4 lubricant or Daily Diesel treatment can increase failure likelihood as well. Any Bosh CP4.X can fail taking the injectors, lift pump, and fuel tank with it... Find out how old the turbo is and how frequently he's been changing the oil, also if he lets the car idle for a bit after a long drive to help the turbo oil journal cool... Make sure the timing belt has been changed as well.

I would also like to mention that out of all the components that failed on their car.. None of them were the CJAA. The engine is solid, its the accessories attached to it that have questionable reliability.

 

[Tdimrtwo]

He didn’t know what caused the last breakdown, but said it was a crank no-start last time he looked, and it would fire on starting fluid. But now it now has a bad starter, and won’t crank. Didn’t have a battery, so it had a lot of Codes, high fuel rail press, low fuel rail press stuck out in my mind.
So, if the CJAA is solid, but the accessories are weak, can you improve reliability by removing those accessories, i.e. dpf and egr delete?

 

[Timma100]

He didn’t know what caused the last breakdown, but said it was a crank no-start last time he looked, and it would fire on starting fluid. But now it now has a bad starter, and won’t crank. Didn’t have a battery, so it had a lot of Codes, high fuel rail press, low fuel rail press stuck out in my mind.
So, if the CJAA is solid, but the accessories are weak, can you improve reliability by removing those accessories, i.e. dpf and egr delete?

Oofff honestly that sounds like the HPFP **** the bed. Don’t touch it, unless the cars free.. that’s gonna be injectors, high pressure pump, filter assembly, auxiliary pump, fuel tank, in tank pump as well… other scenario, maybe a failure of fuel delivery to the high pressure pump.. either auxiliary pump or in tank pump. If you’ve got VCDS or OBDEleven you could command the aux pump on… any chance it’s out of Diesel? Bad fuel gauge? Even if it’s not the high pressure pump and it’s a fuel delivery issue, at this point the pump has been ran dry. So it’s likely trash. So, back to my original statement now that I think about it. Don’t waste your time or money on this one. As for improving reliability, replacing the CP4 pump with a more robust CP3 pump, delete the DPF and EGR, and stay on top of fuel filter, oil/filter, and timing belt changes.

 

[Tdimrtwo]

Thanks for your reply, that really helps a lot. I’m probably going there Friday night to look at it again. Anything I can do at that time to determine the level of carnage? I have vcds, and a pretty good scanner, just haven’t worked on CJAA engines before. I’m pretty good on ALH, and did some on a BEW, but haven’t had to touch my CRUA, and never messed with a CJAA. Car’s not bad otherwise, but I don’t want to get myself into a money pit.

 

[Timma100]

Thanks for your reply, that really helps a lot. I’m probably going there Friday night to look at it again. Anything I can do at that time to determine the level of carnage? I have vcds, and a pretty good scanner, just haven’t worked on CJAA engines before. I’m pretty good on ALH, and did some on a BEW, but haven’t had to touch my CRUA, and never messed with a CJAA. Car’s not bad otherwise, but I don’t want to get myself into a money pit.

Take the engine bay fuel filter out, I think the bolts are T-40 torx on the top of the canister but bring a full set, im probably wrong. Check for any signs of metal.. if you see any. She’s done. The engine is probably fine, but again, the fuel system will need a total overhaul. For a rough estimate, $3K

High Pressure Fuel Pump Replacement Kit (CBEA)(CJAA)

High Pressure Fuel Pump failure replacement kit for the 2.0L common-rail engine CBEA and CJAA in the 2009-2014 Jetta TDI, 2010-2014 Golf TDI, 2009-2014 Sportwagen TDI. This kit replaces parts ...

www.idparts.com

 

[Timma100]

Thanks for your reply, that really helps a lot. I’m probably going there Friday night to look at it again. Anything I can do at that time to determine the level of carnage? I have vcds, and a pretty good scanner, just haven’t worked on CJAA engines before. I’m pretty good on ALH, and did some on a BEW, but haven’t had to touch my CRUA, and never messed with a CJAA. Car’s not bad otherwise, but I don’t want to get myself into a money pit.

The 2010 JSW I own had a blown motor from the last owner not replacing the timing belt. Dealer fixed under emissions warranty and the cars been amazing thus far in my ownership. Besides the need for a complete suspension replacement

 

[DivineChaos]

The 2010 JSW I own had a blown motor from the last owner not replacing the timing belt. Dealer fixed under emissions warranty and the cars been amazing thus far in my ownership. Besides the need for a complete suspension replacement

Yeah, I'm swapping a motor in cjaa a Jetta. Fuel system is good. #2 cyl is wayyyyy down on compression. Others are a bit low. Don't drive on a bad DPf.

 

[rrgrassi]

One should never use starting fluid on a turbo diesel. That is asking for a lot of problems. I would run from this one due to the use of starting fluid.

 

[Tdimrtwo]

thanks for the replies, I’ll do as Timma100 suggests and look for metal in the fuel filter. Any other suggestions to try for evaluation?

 

[runonbeer]

I bought my current '10 Golf not running. Dealer had put a fuel system on it but still couldn't get it to run. I found that one of the cam gears on the driver end of the head had slipped and the cams were out of phase. You need to check compression. It may be very very low. In fact I was tipped off to the compression issue while turning the engine by hand to verify cam & pump timing. It was like turning over a single cylinder lawn mower engine.

 

[runonbeer]

The CJA lacks the spur gear used in the CBE/CR and it also fortunately lacks the BSM.

I replaced the whole head with new OEM. You can probably find a good used head from a salvage yard. I just found this which seems like a pretty good deal assuming it's got new valves/guides etc.

 

[runonbeer]

I also remember having to get a special adapter welded up to be able even check the compression with my tester. Those glow plug holes are deep. Sand tends to accumulate down in those holes too so always blow them out really good before you pull the plugs.