can any one identify this problem i got a 91 pick up 22re and i got a code 43 on my truck diagnostics says knock sensor but code 43 is something else i just got a nother knock sensor and havent changed it yet just wondering if any one else has ever had this problem before its rare i hear that a knock sensor goes. before i found out the knock sensor can retard the timeing and when i shot the timing it was retarted and i brought it back right and gaind a little power i mainly feel power loss up hill not so much on flat road does this soun familiar to any one. please help im losing it over this ive checked every other possable senario plugs wires cap rotor vacume injecctors compresson.

 

I think I had a code 43 too on my 01 4Runner and the Yota mechanic at the dealership told me it wass the knock sensors. There are two in my 5vzfe 3.4L V6. I had the dealer replace them. It cost me $1400. ONly one was bad, but I spent the extra 220 for the second sensor and had them replace it. It's a big job to do those in my engine. It's a must though. Runs so much better now.

 

Ya, when mine when out, the timing was being retarded and i was losing power all over the place. It was bad. It would surge and lose power and ran like crap. Sounds like yours.