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Fault code still not gone after replacement of 99% electricals


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Hi All,

Does any one know of a more refined description of engine diagnostic code 51 on a 3S?

We have replaced the coil, as this was the issue with my sedan some time back.. but this wagon isn't playing nice.

Distributor cap, ignition leads, spark plugs, throttle position sensor, whole dizzy swap which works in other vehicle, rotor and airfilter.

Cold, runs and drives like a beaut.. get to op temp good for a while.. then after shutoff for about 15 mins.. start (warm) and you might as well have pulled two leads off .. misses like a bee atch!

Turn it off , let it sit a while .. starts idles like a dream... we are assuming it is operating temp associated ..but not found it...

Any one had this? or know what to check next ?



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Update.. went out there again today. opened the bonnet, scanned around again totally bewildered. wriggled a few bits and pieces.. closed it..

went to start her .. wind, wind wind.. nothing... wind, wind , wind , start.. no, almost (off back of key) wind, wind let go, started , revved It to keep it going .. missing still but going :clap:

Left it running , til op temp... its hunting and missing occasionally... but runs... HMMMM. stops.. so I figure another 2 days before it will again "sigh" . Started again, and again... so ok.. what is going on?

Tommorow we will change the fuel filter and go again from there......... Thank you Toyota for making our life anything but boring , and our pockets lighter ! :huh:

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Hi all,

Culprit is .. the other components in the dizzy. I removed the one running flawlessly out of my sedan (profile pic) and was the ONLY thing we first interchanged. It started very easily and runs perfect, revs perfect.

So , 2 used, 1 refurbished distributor with new seals, rotor, coil pack, rotor and cap and leads still didn't help.. Our conclusion , the wiring inside the dizzy eg. condenser and pickups.

Wagon dizzy now will be a spare once we find good Guts to put in it.. until then my sedan will lay motionless and be getting hers back after the holiday trip.

Cleared the codes on the ecu again , and still showing a 51 WTF? Over that .

Thanks very much to all for the interest and input .

Edited by toycam88
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