Is there a preferred brand of DCCV?
#1
#2
#3
#4
They are a part of the Fling Dung industrial conglomerate. They also sell unbranded items through their separate Wok Hoam auto parts subsidiary.
All seriousness aside, when deciding what level of cheapness to install, I like to consider the consequences. As with many things in life, I have a sliding scale of ethics. Will a failure leave me stranded? Is this part hard to change?
A replacement cigarette lighter insert? I'm willing to gamble on a white box eBay special.
A suspension control arm? I'm sticking to OEM, Motorcraft, etc.
The DCCV won't leave you stranded, but it sure is a pain to change.
All seriousness aside, when deciding what level of cheapness to install, I like to consider the consequences. As with many things in life, I have a sliding scale of ethics. Will a failure leave me stranded? Is this part hard to change?
A replacement cigarette lighter insert? I'm willing to gamble on a white box eBay special.
A suspension control arm? I'm sticking to OEM, Motorcraft, etc.
The DCCV won't leave you stranded, but it sure is a pain to change.
Last edited by kr98664; 06-20-2023 at 11:36 AM.
The following 2 users liked this post by kr98664:
jya (06-22-2023),
S-Type Owner (06-20-2023)
#5
Have you tried changing the O rings sealing the coils from valves ?
They tend to leak both interenally and hydrauically lock the valve, from operating fully, and leak externally from the base plate.
see photos in the link below.
JagRepair.com - Jaguar Repair Information Resource
They tend to leak both interenally and hydrauically lock the valve, from operating fully, and leak externally from the base plate.
see photos in the link below.
JagRepair.com - Jaguar Repair Information Resource
The following users liked this post:
Aarcuda (06-21-2023)
#6
Have you tried changing the O rings sealing the coils from valves ?
They tend to leak both interenally and hydrauically lock the valve, from operating fully, and leak externally from the base plate.
see photos in the link below.
JagRepair.com - Jaguar Repair Information Resource
They tend to leak both interenally and hydrauically lock the valve, from operating fully, and leak externally from the base plate.
see photos in the link below.
JagRepair.com - Jaguar Repair Information Resource
I did a quick resistance measurement on both the str and the parts car.
on the Str I measured resistance from the FC4 connector (disconnected) to F32 in the engine compartment. That essentially is measuring the resistance thru the dccv coils. My results show:
str
fc4-9 to f32 10 ohms
fc4-10 to F32. 8.5 ohms
parts car
fc4-9 to f32. 15 ohms
fc4-10 to f32. 15 ohms
so it looks like a bad dccv bc bith coils are different ohms and beth are less than the dccv measurements on the parts car (which were both the same)
and a lower coil resistance means higher current and that supports the theory that the resettable fuses in my CCM are opening up after a giving it some throttle (opening of throttle also increases the system voltage a lil bit- probably just enough to pop the resettable fuse.
I bet if I installed a 5 ohm resistor on the dccv ground wires it would limit the current and prevent the fuse from opening in the ccm.
but I’ll just swap the DC CV for the one in the parts car and verify my root cause determination.
The following users liked this post:
bydand (06-21-2023)
#8
They seem to have a nearly 100% failure rate. It's not really a question of IF a DCCV will fail, but WHEN. With practically any DCCV, the clock is ticking towards eventual failure. The best you can do is buy some time with a quality new one. Even though it's your time and money, I'd still be extremely hesitant to install a used unit, considering that replacement is such a pain.
Have you considered swapping out the DCCV guts for new while still installed? Not sure about the later models, but I did it on an early model and it made a miserable task a lot easier:
https://www.jaguarforums.com/forum/s...repair-251854/
#9
A general observation about the DCCV:
They seem to have a nearly 100% failure rate. It's not really a question of IF a DCCV will fail, but WHEN. With practically any DCCV, the clock is ticking towards eventual failure. The best you can do is buy some time with a quality new one. Even though it's your time and money, I'd still be extremely hesitant to install a used unit, considering that replacement is such a pain.
Have you considered swapping out the DCCV guts for new while still installed? Not sure about the later models, but I did it on an early model and it made a miserable task a lot easier:
https://www.jaguarforums.com/forum/s...repair-251854/
They seem to have a nearly 100% failure rate. It's not really a question of IF a DCCV will fail, but WHEN. With practically any DCCV, the clock is ticking towards eventual failure. The best you can do is buy some time with a quality new one. Even though it's your time and money, I'd still be extremely hesitant to install a used unit, considering that replacement is such a pain.
Have you considered swapping out the DCCV guts for new while still installed? Not sure about the later models, but I did it on an early model and it made a miserable task a lot easier:
https://www.jaguarforums.com/forum/s...repair-251854/
#12
Perhaps the Chinese models draw a little less power and can't burn up the control module. Anybody else care to share their results with a Chinese DCCV, good or bad? Don't be shy, we don't judge. Unless you have a man bun. Those deserve to be ridiculed.
The following users liked this post:
S-Type Owner (06-25-2023)
#17
On my '02, the resistance for each coil was approximately 15 ohms, and roughly 0.85 amps at 13.5 volts.
https://www.jaguarforums.com/forum/s...repair-251854/
#18
Can you test the amp draw, too? That's probably the most important thing.
On my '02, the resistance for each coil was approximately 15 ohms, and roughly 0.85 amps at 13.5 volts.
https://www.jaguarforums.com/forum/s...repair-251854/
On my '02, the resistance for each coil was approximately 15 ohms, and roughly 0.85 amps at 13.5 volts.
https://www.jaguarforums.com/forum/s...repair-251854/
#19
Right, but typically resistance changes as the item warms up. This factor changes the results of the equation. An incandescent bulb is an extreme example of this behavior, but nearly all circuits behave this way to some extent. Taking a direct amperage reading under load will be far more accurate than a calculation based on cold resistance.
Last edited by kr98664; 07-02-2023 at 05:27 PM.
#20
I'm contemplating replacing this again as a part of my under the supercharger hose failure project. I found a shop who's working with me on this project and I think we've got a pretty complete parts list now, so we're into the while you're at stuff.
I'm trying not to go nuts though.
When I did this the last time which was maybe 7 years ago I did it out of an abundance of caution so I'm not still running on the original. The car has been down since the fall of 2019 with the coolant drained.
I am replacing every hose + some coolant pump (not the inter cooler pump) + the mechanical water pump. I haven't made up my mind yet on the dccv. You can always make the argument that parts deteriorate just sitting there but I'm trying not go completely nuts of this job as there ARE other repairs to do.
So this Motorcraft part from the Lincoln LS is the exact same part that Jaguar put in this car. I don't know if Motorcraft has switched to a cheaper Chinese manufacturer than what was utilized back in 2005. I see reference to it being originally a Bosch manufactured part but they too get some of their stuff made in China.
https://www.carparts.com/details/Lin...E&gclsrc=aw.ds
Here's the Bosch version https://www.ebay.com/itm/14463603903...Bk9SR8C_pbmlYg
Gates makes one as well https://www.ebay.com/itm/12532241500...epid=237928261
I'm trying not to go nuts though.
When I did this the last time which was maybe 7 years ago I did it out of an abundance of caution so I'm not still running on the original. The car has been down since the fall of 2019 with the coolant drained.
I am replacing every hose + some coolant pump (not the inter cooler pump) + the mechanical water pump. I haven't made up my mind yet on the dccv. You can always make the argument that parts deteriorate just sitting there but I'm trying not go completely nuts of this job as there ARE other repairs to do.
So this Motorcraft part from the Lincoln LS is the exact same part that Jaguar put in this car. I don't know if Motorcraft has switched to a cheaper Chinese manufacturer than what was utilized back in 2005. I see reference to it being originally a Bosch manufactured part but they too get some of their stuff made in China.
https://www.carparts.com/details/Lin...E&gclsrc=aw.ds
Here's the Bosch version https://www.ebay.com/itm/14463603903...Bk9SR8C_pbmlYg
Gates makes one as well https://www.ebay.com/itm/12532241500...epid=237928261
Last edited by Staatsof; 07-06-2023 at 09:54 AM.