Quote:
Originally Posted by Toothbrush
Ordered the OTC 7448A, OTC Adapter 549578 (per OTC should work with 07, 4.8i), OTC 7000A cleaner - 1 can, CarbonClean MV-6 Max Strength - 2 cans. Spent $100 less for all the above compared to just the 7649A kit. The adapter #'s OTC gave me for the X were not listed with that kit and I'm assuming there's no need for the decarbon adapter since the CarbonClean is designed to work through the fuel rail.
If everything comes in before next weekend, I'll do it that Sunday, but the shipping dates for some items range past that time so may have to wait longer.
The plan at this piont:
- Pick up a combustion leak detector to make sure nothing is found (doesn't appear a single drop of coolant has been lost since the valley pan was changed, but...)
- Leak down test on Cylinder 1
- Test compression on all 8 Cylinders
- Take 'Before' picks of all 8 with boroscope, try to look at valves too
- Run the 7000A Fuel injector cleaner first
- Test compression on all 8 Cylinders
- Take 'After picks' of all 8
- Run the CarboClean Decarb
- Repeat compression test/s / take 'After' pics
I know that the fuel injector cleaner probably wont do anything for compression or change the state of the combustion chamber, at least for cylinder 1 since it has a brand new injector, but would be good for others to see separate 'proof' images anyway for both banks.
My assumption is running the fuel injector cleaner first will help maximize the effectiveness of the carbon cleaner solution. ?
Of course, on additional step; pray that one or more of the steps above solves the misfire. |
The way this cleaner works is that you shut off the fuel pump, and run the car on the pure solvent. The kit comes with a book that will tell you the pressure to set the device valve at, so you're matching the normal fuel pressure. Or you can put a fuel pressure gauge on before disconnecting the fuel pump and measure the pressure.
The two tricky things are getting the proper fittings to hook up to the fuel rail, and disabling the fuel pump while still allowing the car to run. Pulling a fuse doesn't always do it; some cars you have to physically unplug the fuel pump. I don't know the procedure on the X5. BTW, on the last car I did, (an infinity G35,) the car ran about 1/2hour on one can of solvent. I would guess the X5 is a little more thirsty, so figure 20min or so.
Given that you are burning this solvent instead of fuel, it can definitely have a positive effect the combustion chambers. How much is anyone's guess. Since both the fuel injection cleaner and the decarbonizer are going exactly the same place, I'm also not sure how different their impact will be. I know I have seen distinct drivability improvements from the fuel injection cleaning. But there's a reason walnut blasting is done; the solvent might not be enough. But walnut blasting is far more invasive. It's absolutely worth a try, and the results of your "scientific" methodology will be very interesting.