Thread: Spark Knock.
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Old 11-17-2001, 10:18 AM   #7
kmauldin
Registered Member
 
Join Date: Nov 2001
Location: Atlanta, Ga.
Posts: 22
Question spark knock-my story

I'm glad someone's talking about this. Here's my story...

I have a '97 GT coupe with 70,000 miles; stock with the exception of a K&N. Over time she developed knock under load and high RPM's. I bumped up to 89 octane, then later to 93 to calm it down until I could get to the Ford guys to fix it. Once I took it to Ford they told me the octane reading in the ECM was ??? (no reading). They set it back to 85 to accept the regular unleaded gas which fixed it for about 3 weeks, then gradually, it has come back again. I am again running 93 octane keep it quiet but under high RPM's, she's still a knock-in.

Regular unleaded gas has dropped to it's lowest price I've seen here in at least 4 years. Sure would like to take advantage of it.

I was thinking of a MSD Dis-4 ignition module to get rid of the knock. Would I be better off getting a Steeda timing adjuster so I can manipulate it myself? The more simple, the better.

Suggestions would be greatly appreciated!

Thanks...
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KMM
'97 GT coupe; K&N, 3:73's, steeda tri-ax, Mac catted H, Mac flow-path cat-back, aluminum driveshaft, white face guages
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