Code 51
- Thread starter edi
- Start date
Ummm.. The J-tube is just a restriction in the fuel return line and is non electrical. But, if it was missing in the sense that it some how got jammed under the throttle linkage and was keeping the throttle open so the TPS would show a code 51, then yes I guess it is possible (not likely though). 
i didn't think it would, but thats the only thing that i've got left to fix on my car, and was HOPING that maybe it'd fix it... but oh well, time to take apart the TPS! -y-a-y-
My car's had the AC removed (don't ask me why... previous owners *shakes head*)... could that be why its throwing a code 51?
Joel W. said:Ummm.. The J-tube is just a restriction in the fuel return line and is non electrical. But, if it was missing in the sense that it some how got jammed under the throttle linkage and was keeping the throttle open so the TPS would show a code 51, then yes I guess it is possible (not likely though).
No, I've just to be in a country where the internet isn't a novelty. Being in a nuclear wasteland didn't help either
If I had a swap done and they bypassed the neutral safety switch(starts without pushing in clutch) would that also throw the code I am trying to get my car to stop loping at idle
I have a question concerning this too. Ive looped the NSS plug in order to go back to the stock starter curcuit. It's because of a 5spd swap. Was wondering if that could casue it. Anyway I think it's my TPS, because the car doesnt wanna idle, regardless of timing. Have yet to check it.
If you now do not have a code 51 showing, the clutch switch should not effect your idle imo. You said you messed with the timing, was that with the diag block jumper installed? Maybe you can describe your idle problem in more detail? What rpm is it it at when it's cold and hot? Does it stall out and die or is it just rough idle?
http://www.cygnusx1.net/supra/library/TSRM/fi/FI_014.html
http://www.cygnusx1.net/supra/library/TSRM/fi/FI_016.html
http://www.cygnusx1.net/supra/library/TSRM/fi/FI_014.html
http://www.cygnusx1.net/supra/library/TSRM/fi/FI_016.html
Joel W. said:
Yes, jumper was installed.
When it gets running itll idle down and jump go all the way down to about like 500 rpm, and it runs rough at that time. Then, if you rev it, its sounds even, until you let off. At that time, the RPM dramatically dips, or it stalls.
Thanks Joel. I did the test as per TSRM . results IDL-E2 failedx2,Vcc_e2 ok VTA-E2 failed guess that code 51 was a shitty Tps, as far as the Nss I will check it after the "money pit" gets back from the shop in the am Thank You again
Whoops, I had to fix post 34 as I meant to say cruise control system and not the AC system. The clutch switch has nothing to do with the AC system. Brain fart I guess.. :naughty:
Trydrew: I don't know what to say except I would start with the basics, like compression test, timing, looking for vac leaks, misfires, checking the ISC for function.
Matt: Just adjust the TPS as per the TSRM, no need to replace it yet. Loosen the screws and turn it until you get continuity between IDL and E2. then tighten it up and verify it is working like it is supposed to.
Trydrew: I don't know what to say except I would start with the basics, like compression test, timing, looking for vac leaks, misfires, checking the ISC for function.
Matt: Just adjust the TPS as per the TSRM, no need to replace it yet. Loosen the screws and turn it until you get continuity between IDL and E2. then tighten it up and verify it is working like it is supposed to.
Doh! to late now its already done..oh well one less ting to replace lol . Now about the cruise control that is also unhooked well atleast as far as I can tell. The parts are their but the throttle cable is not installed(jdm motor no bracket)<---- problem?
mattsplat72 said:
It is a problem if you want your cruise control to work properly. I don't think it can effect your Idle issue. So your code 51 is gone now correct?
If so, you should also verify the timing is correct as it can not be set properly with a code 51 from the TPS showing. After that, if your still having issues, I would also suggest starting with the basics, like a compression test, looking for vacuum leaks, misfires, checking the ISC for function.
let us know.
No code 51 unless I make it appear,did throw 31 but just repluged the afm in and it went away.timing is dead on but had to retard 1 tooth to get it to idle low and to get rid of the lope . getting ready to take Isc off of car and take to auto zone to have it checked . New Isc is 475.00 and the "rebuild kit" is 70.00 and it is a overnighter from japan . but I will desamate all lol j/k
I think you can test the ISC on the car without any special tools to verify that it is working. I will have to dig through some posts here to find the procedure.
Dont worry about it . I tested it and it was shot . so instead I replaced my cam seals and my valve cover gaskets . Valve train looks great oil was a dark honey color absoultly no sign of wear anywere.