Knock sensor
Thread Starter
Instructor
Joined: Apr 2011
Posts: 127
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Knock sensor
I've been chasing an overheating problem in my 93 6 speed coupe for quite some time. I've been through 3 thermostats, 2 radiators, a water pump and hoses trying to make it run as cool at 1200 rpm as it does at 3000. In another thread, another member suggested that perhaps I've got a bad knock sensor making it run too lean and perhaps not backing the timing off enough. I've got single chamber Flomasters on it, so I'm guessing if it was pinging, I would not hear it. Thoughts?
Not that it should affect engine temp, but I also installed a new Opti Spark while the water pump was off.
Not that it should affect engine temp, but I also installed a new Opti Spark while the water pump was off.
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 12
; it has no direct affect on the amount of fuel supplied
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 411
From: WV
with Cliff, most times a scanner will show you what on your motor is working right and what's not...A motor running lean can cause higher temps and a scanner would show that.. It also shows what all the sensors in the motor are doing... It's hard to diagnose these cars without a scanner....WW
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
If the knock sensor was retarding timing too much it could cause a hotter running engine. A diagnostic tool as has been suggested is the best way to observe knock sensor operation. Early LT1's were prone with knock sensor issue's. However, usually it sets a code?
