94 sc400 knock sensor woes
 

Alright after doing every bit of advice I've read and getting nowhere I'm now at a loss.

So im getting a code 52 and a code 25.

After finding out it had a cheep knock off vortex in it and replacing it with an actual one off ebay (thank god it worked) the car runs pretty good, but as soon as it gets warm and you give it some gas, cel code 52, if I shut it off and restart it won't be there till I rev it up agine.

If I drive it for a bit after clearing codes I get a code 25 fuel to air lean, not shire the cause of this but. It's there aswell.

I know I'm having some issues with my TPS, getting that worked on aswell but it seems unrelated. Let me know if wrong, it's in the works to be replaced and set properly

I checked the knock sensor wires for continuity and both have it. Strangely it looks like new wires ran for the knock sensors at the ecu, large brown wires are connected to clear ones going in to the plug, even tho that both have continuity, I was wondring if this could be the problem. Previous owner wired radio in to the ignition wire, another possble cause or am I just going a bit strange in thoughts, I've ben threw hell with this car and this is really the only problem I'm having.any advice would be welcome. Thank you

What kind of connection is made between the clear wire going into the ecu plug and the new wire you describe? It sounds like somebody changed the knock sensor wires. If they didn't use shielded wire and connected the shield to the grounding at the ecu that's probably some of your issue.

it is a proper join solder and everything, heat shrink, it looks proper done because its run threw the factory harness aswell

My old '94 SC400 had knock sensor issues that turned out to be the ECU. The trace was nearly corroded through right by the input pins -- difficult to see under the metal bridge -- and presumably lost its signal when warmed up (thermal expansion and/or vibration).