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Congrats on the newest beast!

#1, What kind of plugs are the NGKs you got? Single electrode ground or multiple? I'd get the codes read before doing anything to verify the miss didn't follow the coil swap.

#2 yep! sounds like a...

Spoken like a true 4.8is owner :)

There are some threads on Xoutpost on how to delete the air suspension in the assembly code so you don't get the annoying air suspension inactive warning

As long as you're doing suspension work, checkout this video from VAC motorsports on the rear ball joints. Common failure and it will wear out your new tires in record time....

Did I send you the PDF that shows the components of the air suspension? You have to trace back from that air bag. I would assume a leak would be forward of the valve. Otherwise, all the air bags...

Swap to coilovers.... you're beginning to see what I mean about the air suspension, eh?
When you swap to coilovers, you'll have to code out the air suspension to get rid of the inactive warning...

If only the seals swelled in the caliper, you should be good but there are also seals in the master cylinder and the ABS module. Also, if the only thing wrong with the caliper are the seals, you...

Yikes! we've all been there....

Good news about the suspension at least. :)

The air suspension on the X5 is pretty cool. I can relate to why you'd want to keep it. We felt the same way until realized how much we spent fixing it. I just don't want to see you go down the same...

Convert the X5 to standard suspension. The air suspension is a bottomless pit, trust me.

With the money you spend by the time you get it working properly, you could have a sweet coil over...

The dealer replaced my valve cover gasket under warranty about 9 years and 100k miles ago... I just swapped it last month because I figured it needed to be done but it was still in perfect shape and...

Definitley do the oil filter housing gasket first.... the way it drips, can make it look like the oil pan gasket is leaking too.

Ok I found all of my old X5 stuff. PM me your email address and I'll send it all to you :thumbsup

I'm going to get you that white paper over the weekend... been swamped with work and kids

Keep an eye on those air bags. The system will compensate for a leaking air bag by running the compressor so you may not notice it. If the compressor runs too long, it burns out. The air bags become...

I can help you with the X5. The air suspension inactive and tire pressure light on together means that the air suspension module is most likely gone bad. There are several other things that you...