Hi everyone, it's been a while since I've been on.
The search feature didn't net any results after a half hour of reading.
I have a 99 Mercury Grand Marquis Presidential with 77,000 miles.
I'm experiencing some serious spark knock above half throttle in lower gears and at lower throttle levels in higher gears.
No check engine light.
I thought I would check the base timing, but the tag under the hood said timing wasn't adjustable.
My number one suspect is a vacuum leak.
Any "typical" problems or areas that I should be looking for, or am I barking up the wrong tree entirely?
Any advice is most definitely appreciated!
Thanks in advance!
Rob
The search feature didn't net any results after a half hour of reading.
I have a 99 Mercury Grand Marquis Presidential with 77,000 miles.
I'm experiencing some serious spark knock above half throttle in lower gears and at lower throttle levels in higher gears.
No check engine light.
I thought I would check the base timing, but the tag under the hood said timing wasn't adjustable.
My number one suspect is a vacuum leak.
Any "typical" problems or areas that I should be looking for, or am I barking up the wrong tree entirely?
Any advice is most definitely appreciated!
Thanks in advance!
Rob
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