Hi everyone. the zed has developed a problem:confused:a few days ago the exhaust temp light kept coming on then went away- now its back with a vengence the light comes on for a couple of minutes and the car is now running rough with a realy rough idle and a bad smell of burning when car is parked.Its a 90 j spec twin turbo auto,it says something about the exh temp on the sunvisor i just wish i understood japanesse:rant:

Exhaust temp light comes on when the unburnt fuel is being ignited in the Cats. Unburnt fuel is getting into the cats because one or more cylinders are not sparking and igniting the fuel...aka..missfire.

 

Most likely reason is corroded coilpack connectors, failing PTU or brittle wiring loom.

Exhaust temp light comes on when the unburnt fuel is being ignited in the Cats. Unburnt fuel is getting into the cats because one or more cylinders are not sparking and igniting the fuel...aka..missfire.

 

Most likely reason is corroded coilpack connectors, failing PTU or brittle wiring loom.

 

You missed one David, how about a split rubber around the spark plug? Happened to mine, so got a new coil-pack and that sorted it :cool:

cheers guys my week is just getting better and better

so how hard are each of them things to fix?and were is the PTU unit located?

the ptu is located at the front of the engine on the driver side

http://s251.photobucket.com/albums/gg300/richardswain21/?action=view&current=100_0449.jpg

if you dont mind mate could you mark it on this pic for me?

Check this out for location of units >> http://www.300zx.co.uk/forums/showthread.php?t=26120

 

PTU change, 4 x bolts plus 2 x connectors

Coil-Pack, 2 x bolts plus 1 x connector

Changing a coil-pack connector or sorting a brittle loom will be a bit more involved, depending what is wrong, but look for 'Green gundge'!!

 

HTH

Dave

cheers dave your a star:nana2:

while you're at it, it's a good idea to clean up every connector you can get to ;)