No it's not a electronic throttle I have a cable. I thought the electronic throttle was just for the common rail diesels.
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That's a new piece of info for me didn't know there were series 1 and 2 prado. Mine is a 1998 European specs as it used to belong to someone in the Italian embassy in Egypt.
So just to double check I should find the red/black wire in the ECU and get a temp wire from it directly to the TCV and the green/white I should connect it directly to power from the battery?FJ70-1989 / LJ70-1987 / RJ70-1988 / HDJ75-1991-1HD-FTE / RN135L-1991 4Runner All SOLD
HDJ80-1992-OME suspension, Custom Roof Rack, OEM Winch
KZJ-90-1999-Front Bumper, OME suspension, 75 L Auxiliary tank, Custom drawer system
Yamaha TT600, Belgarda, 1996
VW, Beetle Convertible 1303, 1974
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Originally posted by scottkz View Postthe series 1 wiring diagram i have says red/black goes to the ECU and the blue wire goes to power....FJ70-1989 / LJ70-1987 / RJ70-1988 / HDJ75-1991-1HD-FTE / RN135L-1991 4Runner All SOLD
HDJ80-1992-OME suspension, Custom Roof Rack, OEM Winch
KZJ-90-1999-Front Bumper, OME suspension, 75 L Auxiliary tank, Custom drawer system
Yamaha TT600, Belgarda, 1996
VW, Beetle Convertible 1303, 1974
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I have Red/Black and Green/White to the TCV. Below are the several trials I did and the conclusion.
1)Temp wire from ECU directly to TCV :
No change at all.
2)Give ground (-) directly to the body of the TCV sensor:
Engine sounds much better and no rattling till it hits 2500 RPM and it starts to rattle and unstable.
Any suggestions? I have a EGR sensor as it's European specs, can it be the one causing this ?FJ70-1989 / LJ70-1987 / RJ70-1988 / HDJ75-1991-1HD-FTE / RN135L-1991 4Runner All SOLD
HDJ80-1992-OME suspension, Custom Roof Rack, OEM Winch
KZJ-90-1999-Front Bumper, OME suspension, 75 L Auxiliary tank, Custom drawer system
Yamaha TT600, Belgarda, 1996
VW, Beetle Convertible 1303, 1974
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Yes this is what I did direct power to the red/black wire and temp wire from ECU to green/whiteFJ70-1989 / LJ70-1987 / RJ70-1988 / HDJ75-1991-1HD-FTE / RN135L-1991 4Runner All SOLD
HDJ80-1992-OME suspension, Custom Roof Rack, OEM Winch
KZJ-90-1999-Front Bumper, OME suspension, 75 L Auxiliary tank, Custom drawer system
Yamaha TT600, Belgarda, 1996
VW, Beetle Convertible 1303, 1974
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All earth connections checked! This car is driving me crazy and I'm sure it's going to be such a stupid small reason for all thisFJ70-1989 / LJ70-1987 / RJ70-1988 / HDJ75-1991-1HD-FTE / RN135L-1991 4Runner All SOLD
HDJ80-1992-OME suspension, Custom Roof Rack, OEM Winch
KZJ-90-1999-Front Bumper, OME suspension, 75 L Auxiliary tank, Custom drawer system
Yamaha TT600, Belgarda, 1996
VW, Beetle Convertible 1303, 1974
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Ok another very weird symptoms is when I disconnect the crank sensor the engine doesn't die?! Any suggestions?FJ70-1989 / LJ70-1987 / RJ70-1988 / HDJ75-1991-1HD-FTE / RN135L-1991 4Runner All SOLD
HDJ80-1992-OME suspension, Custom Roof Rack, OEM Winch
KZJ-90-1999-Front Bumper, OME suspension, 75 L Auxiliary tank, Custom drawer system
Yamaha TT600, Belgarda, 1996
VW, Beetle Convertible 1303, 1974
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Yeah that's normal... It goes into limp mode bassicly the engine runs on one preset fuel curve and uses none of the sensors it's so you can get home
You could probly change the crank sensor there the same for most early toyota diesels
Failing that I'd say something is broken inside the injector pump
A friend of mine had one fully rebuilt in Perth for about 1300$ that included fitting
He was getting a heap more ks to a tank after that it had to be rebuilt as it had the engine light come on an off randomly
This was on a 1kz surf witch has the same pump as the early 90 series Prados
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I replaced the crank sensor, but still the same issue. My other concern is according to my knowledge there's a rev limiter when the RPM hits near the red line the engine should stall or something which doesn't happen in my case as well.
Anyone did a mechanical pump conversion just to avoid all these sensors? I did some reading and I know they use the Mitsubishi 4M40 mechanical pump. What about the 1KZ-T pump?FJ70-1989 / LJ70-1987 / RJ70-1988 / HDJ75-1991-1HD-FTE / RN135L-1991 4Runner All SOLD
HDJ80-1992-OME suspension, Custom Roof Rack, OEM Winch
KZJ-90-1999-Front Bumper, OME suspension, 75 L Auxiliary tank, Custom drawer system
Yamaha TT600, Belgarda, 1996
VW, Beetle Convertible 1303, 1974
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By the way I'm doing temp wires for all sensors from the ECU and see how it will function. I have an extra wiring loom from a auto engine so I cut the plug of the ECU from it and will attach temp wires and keep you posted.FJ70-1989 / LJ70-1987 / RJ70-1988 / HDJ75-1991-1HD-FTE / RN135L-1991 4Runner All SOLD
HDJ80-1992-OME suspension, Custom Roof Rack, OEM Winch
KZJ-90-1999-Front Bumper, OME suspension, 75 L Auxiliary tank, Custom drawer system
Yamaha TT600, Belgarda, 1996
VW, Beetle Convertible 1303, 1974
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