Slight miss at 55MPH
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Member
Joined: Apr 2009
Posts: 40
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From: South Carolina
Slight miss at 55MPH
Sometimes I get a very slight miss, almost undetectable, when I run at around 55MPH. Anyone get this as wekll or am I being too picky. Just cleaned the MAF, throttle body, and part load breather. Didn't help
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Joined: Jun 2007
Posts: 261
Likes: 14
From: California
A miss can also be electrical. Valve gaskets have a tendency to start leaking on these cars which causes oil to go into the spark plug wells. This can cause a miss. Pull the ignition coils to see if you have oil in the wells. You might have a bad plug also.
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Miss, Hesitation
I've had the same problem going-on three years...and no one can figure-out the problem. I've had three NEW throttle bodies put in, eight new coils, and still the hesitation/slight miss problem occurs. It actually goes away for about 13-months after a new TB, but that gets rather expensive since Jaguar doesn't replace it for me on warranty.
I'm at my wits-end on this...
I just had a 100,000 mile check-up; new plugs, belts, the works...including all new coils.
Any ideas on what I tell the dealership to look at next?
I'm at my wits-end on this...
I just had a 100,000 mile check-up; new plugs, belts, the works...including all new coils.
Any ideas on what I tell the dealership to look at next?
Thread Starter
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Member
Joined: Apr 2009
Posts: 40
Likes: 1
From: South Carolina
Mine seems to happen between 55-60 MPH. If I hold the car steady at that speed it will surge a small amount. Over 60 and smooth as glass. I've cleaned the TB, MAF, fuel filter, part load breather-I gues next are the plugs and coils. Anyway to inspect the coils without just puting in new??
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Don't bother with the coils...I've replaced all eight in the past 12 months and the problem still exists. I am taking my car back to Atlanta in the near future and let the dealership have it for a week to see if they can duplicate the problem and come up with a solution. I will let everyone know if it gets fixed.
Again...don't waste your money on coils; I've been that route. As I said in my earlier email: it is rather suspicious that a throttle body replacement always cures my problem for about a year. This all started with Jaguar recalling the TB; I never had the problem until the recall.
Again...don't waste your money on coils; I've been that route. As I said in my earlier email: it is rather suspicious that a throttle body replacement always cures my problem for about a year. This all started with Jaguar recalling the TB; I never had the problem until the recall.
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