Backlash2032;1946732 said:
As for the actual number mine ohm'd out to be, I don't remember. I rewired mine using RG-6 coaxial cable with soldered ends and the shielding grounded.
Carbon build up/ black exhaust
- Thread starter redSUPRA '88
- Start date
As for the actual number mine ohm'd out to be, I don't remember. I rewired mine using RG-6 coaxial cable with soldered ends and the shielding grounded.
so just pick that up from the local hardware store and get it cut to the required length?IndigoMKII;1946737 said:
I got the new sensor in today 
I just installed it and the car runs the same as expected. So I got under the car and unplugged the KS. Engine still ran the same smoke and everything. So I know for sure it's the wire.
I just installed it and the car runs the same as expected. So I got under the car and unplugged the KS. Engine still ran the same smoke and everything. So I know for sure it's the wire.
I feel like I have. I know a lot more than I used to. I'm going to do the re-wire for the sensors. Hopefully ill be able to order the coax cables and connectors next week and then ill follow BoostedSupra's step by step write up... So I do it correctly hahajetjock;1946966 said:
So I guess I only have one knock sensor? I can only find one KS on my block. Here's a picture from back when the rebuild was done 
unless I'm missing something I only have one KS. But I thought 7m's are supposed to have 2? Somewhere around the starter. I don't mind only re-wiring one hahah, I'm just a little confused.
unless I'm missing something I only have one KS. But I thought 7m's are supposed to have 2? Somewhere around the starter. I don't mind only re-wiring one hahah, I'm just a little confused.
You don't need to order the coaxial cable or the KS connector. I went to Lowes and bought 6-8 ft of rg-6 coaxial shielded cable then went to a local toyota dealer and asked for a knock sensor plug. It's used the same connector on quite a few vehicles.
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And to better answer your question what 1988ma70supra said is correct there is only one knock sensor on the n/a 7mge supras and two on the turbo 7mgte supras.
lol no problem anytime and i would get on that knock sensor rewire asap and at least you only have one to rewire not two like us gte guys haha.
lol yeah. I wish i could do it sooner, work gets in the way of everything! But yeah more than likely monday will be the day. But ive been doing a little prep work today..... i think my neighbors are tired of seeing my car on ramps ::dead horse::
Alright guys. Touched my car for the first time since last week, yesterday. I wanted to test the continuity of the wire so I won't do all the work for nothing. My dad helped cus he tends to know more about that shit than me :nono: anyways we Hooked the voltmeter up to the KS connector and the port where the wire hooks up to the EVU and it zero'd out so the wire is good. Then we hooked it up directly to the KS wire going into the ECU and grounded it out. Got no reading. So unless we messed up somewhere it's the KS itself? Since theres no signal making it to the computer... Only reason I'm not too keen on replacing it is its $140 now wherever I get it unless someone on here can cut me a deal :naughty: but seriously thanks for the input so far guys and keep it coming please!!!
I got a new knock sensor in today and installed it. At first it ran good still a little smokey, so I took it to get gas.started it again and it would idle for a second then die. So I get it home and go through what could be wrong. Still gives a code 51. We unplugged the fuel pump relay and the car ran smoother and the black smoke went away. So we checked resistance in the FP resistor and it came back with this 
the owners manual says it should read out to 0.7 ohms checked the fuel pump relay as well and got this 
so I'm gonna replace both of these and see what happens
the owners manual says it should read out to 0.7 ohms checked the fuel pump relay as well and got this so I'm gonna replace both of these and see what happens
Stop swapping stuff based on very poor diagnostic technique. Neither the fuel pump relay or resistor is at fault. Nor can the engine run with the relay unplugged. If you're going to fixate on the fuel system you should be checking pressure.
I'm not going to argue with this, just state where I'm coming from. I do not believe the KS sensor was a bad purchase. I do see how just replacing random parts won't get me anywhere. I will start looking into the fuel pressure. And, not arguing, but my engine did indeed stay running while the relay was unplugged.jetjock;1950828 said:
Then the wiring isn't stock. All the more reason to troubleshoot properly. Now if you meant the car ran for a little bit then of course it will and of course any smoke due to enrichment would disappear. As for the KS you said in post 36 it didn't fix anything (not that 51 is related) but hey, maybe you're right. Replace the relay and resistor. Best to buy new ones from the dealer. Let us know what happens. If nothing changes refer to post 24...