Locked up 2010 JSW

[Tdimrtwo]

I have a 2010 JSW with a locked up engine and a “good” 88k mile CJAA engine that I plan to swap out soon. I also want to do the CP4 to CP3 hpfp swap to avoid the CP4 metal shavings nightmare that I’ve read and heard so much about.

1. Would it be better/easier to do the CP3 swap on the new engines before I install it, or is it just as easy with the engine installed?

2. I’ve read that you both need a tune and don’t need a tune to make it run well with the CP3 swap (without a cel). Whitbread’s website says a tune is needed, so what is the best/least expensive tune for fuel economy and driveability, not really looking for power gains.

3. What kind of vehicle can be a donor for a used CP3 hpfp? Whitbread lists two compatible Bosch part numbers, but doesn’t say what the pumps were used on. I believe I’d rather source my own local HPFP than get the rebuilt one from England that whitbread sells. I understand that CP3 pumps were at least used on BMW’s and domestic pickups, but I don’t know if all CP3’s are the same.

Any info or advice on what I may be missing would be greatly appreciated.

 

[Tuheeden]

Here are my responses:
1. The CP3 is easy to install either time but its always easiest when the engine is out of the car.
2. You do NOT need a tune and you will not get any lights, however a tune and an upgraded rail pressure sensor will be an improvement even if everything else is stock.
3. I would not try and guess at a CP3 yourself. You can contact Keith at United Diesel and order it direct if you want. Their pumps really are well done and they come with the proper metering valve. If you go for the new BMW pump keep in mind that it does NOT have a lift pump so the intermediate fuel pump must remain.

I have not done the BMW pump but I have done like 10+ with the Whitbread kit and zero troubles.

 

[kjclow]

Can help much with the install questions but I will comment about the failed CP4 pumps. If you buy diesel at a high turn over station that hopefully also has a small amount of bio, then you should have no issues. I'm sitting at 160k miles with no issues.

 

[Wilkins]

My understanding is that the CP3 which is often used comes from a Peugeot. A conversion plate is required to mount it in place of the CP4. The hp fuel line needs to be realigned and depending on the source of the pump this can be more or less difficult.
A tune is not always necessary but is recommended for best performance and trouble free operation. @calimustang can provide more information about the fuel metering valve needed.

 

[Tdimrtwo]

Previous owner of my JSW gave me receipts for VW replacing the hpfp and entire fuel system twice under warranty. Not sure where he got his diesel, but he lives in Ft Worth, TX, home to thousands of diesel pickups, so any station should have pretty high turnover. I know the failure is random, and many people never experience it, but two failures in 210k miles is enough to make me look for a better solution.

 

[Tdimrtwo]

Here are my responses:
1. The CP3 is easy to install either time but its always easiest when the engine is out of the car.
2. You do NOT need a tune and you will not get any lights, however a tune and an upgraded rail pressure sensor will be an improvement even if everything else is stock.
3. I would not try and guess at a CP3 yourself. You can contact Keith at United Diesel and order it direct if you want. Their pumps really are well done and they come with the proper metering valve. If you go for the new BMW pump keep in mind that it does NOT have a lift pump so the intermediate fuel pump must remain.

I have not done the BMW pump but I have done like 10+ with the Whitbread kit and zero troubles.

Thanks for your advice and the benefit of your experience, you’ve convinced me to get the Whitbread kit and pump.

 

[Tdimrtwo]

My understanding is that the CP3 which is often used comes from a Peugeot. A conversion plate is required to mount it in place of the CP4. The hp fuel line needs to be realigned and depending on the source of the pump this can be more or less difficult.
A tune is not always necessary but is recommended for best performance and trouble free operation. @calimustang can provide more information about the fuel metering valve needed.

Thanks for your response, I’ll order the Whitbread kit right away. What tune would you recommend for a daily driver looking to optimize drivability, reliability and economy?

 

[Wilkins]

Malone/Tunezilla

 

[Tuheeden]

If you do the CP3 and your going to do a tune, get the 2200mb fuel rail pressure sensor. It's literally one socket and then the tune can increase the max rail pressure from 1900mb to 2000mb. You will feel the difference!

 

[Tdimrtwo]

Ok, thanks for the heads up.