Rattling on acceleration
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I know there's some difference between the way the US & UK determine petrol grade, but the minimum spec in the UK is 95RON. I'm thinking you're hearing engine knock, if you can get higher grade fuel in your area I'd try a tankful, it can't do any harm, unless you've been running this grade for years without trouble.
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The attached Bulletin regarding detonation on your Super; if it's never been done.
Thermostat allowing an elevated engine temp, maybe not an actual over-heat.
Make sure the induction intercooler pump is operating.
Possible injector buildup reducing fuel. Could try a couple of tanks with BG 44K fuel cleaner added a couple of weeks apart.
I wouldn't say it COULDN'T be the supercharger, but I doubt it.
Cheers,
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jahummer (02-10-2012)
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I'll surely be interested in how long term the improvement is with your car.
How does it feel to be the engineering department??
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Cheers,
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I am an engineer, actually, in electronics (automation, robotics, video & acoustics). Perhaps that will explain a bit about my posts on this forum.
Unfortunately there is no quantifiable data here particularly due to also have the injectors cleaned at the same time and that will, like other things with this car leave me guessing as to what the solution was.
What we do have is coincidence and a problem solved which should satisfy my concern. FWIW though I did put a couple of cans in each of my other cars even though they exhibited no signs of needing it.
This car has become somewhat of a hobby I suppose and have been pleased with the accessibility of service manuals (and this forum). I have been very involved with every car I have owned while at the same time letting the dealers worry about most of the maintenance as needed until time to trade up to the newest model prior to warranty expiry. But as mentioned several times before, there is something special about this one and will keep it in like new condition for as long as I am able even if it (and my favourite Jag dealer) frustrates me from time to time.
Unfortunately there is no quantifiable data here particularly due to also have the injectors cleaned at the same time and that will, like other things with this car leave me guessing as to what the solution was.
What we do have is coincidence and a problem solved which should satisfy my concern. FWIW though I did put a couple of cans in each of my other cars even though they exhibited no signs of needing it.
This car has become somewhat of a hobby I suppose and have been pleased with the accessibility of service manuals (and this forum). I have been very involved with every car I have owned while at the same time letting the dealers worry about most of the maintenance as needed until time to trade up to the newest model prior to warranty expiry. But as mentioned several times before, there is something special about this one and will keep it in like new condition for as long as I am able even if it (and my favourite Jag dealer) frustrates me from time to time.
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Last edited by jahummer; 04-03-2012 at 09:18 PM.
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Don't be so quick to write off the value of your reporting on the use of BG44K. Every little bit of information helps. As I said somewhere here before, I am becoming a believer more and more as time goes on. And that's coming from a guy that used to be one of those that always recommended AGAINST most any additive. I NEVER had my life made easier by anything added to any automotive tank, fluid or oil.......until now. This seems to be a direct result of fuel quality and newer multi-point, fine spray injectors.
Still collecting data........appreciate the input!
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