aussiebob Posted May 24 Share Posted May 24 4.0L 88 Whats the sensor on the block below the manifold?. Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 24 Share Posted May 24 Pic? Probably coolant temp for the ECU or knock Link to comment Share on other sites More sharing options...
89 MJ Posted May 24 Share Posted May 24 If it’s the one I’m thinking of, it’s a knock sensor. Link to comment Share on other sites More sharing options...
fiatslug87 Posted May 24 Share Posted May 24 The knock sensor is just above the oil pan, the coolant sensor is a little higher. Link to comment Share on other sites More sharing options...
87MJTIM Posted May 24 Share Posted May 24 Knock sensor is toward the front. Coolant sensor is toward the rear. Link to comment Share on other sites More sharing options...
aussiebob Posted May 25 Author Share Posted May 25 Thanks for the input guys had a bad knocks sensor!. Link to comment Share on other sites More sharing options...
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