EJ25 running rough

[Russell]

It"s called an "OB2" plug thingo............call rod T.......he was getting one made up for tracking faults etc that get "logged" in your pewtar.But hang on a minute.........you"ve tested all your inputs, you"ve changed pewtars, and still it won"t go. I would still try one by one, exchanging sensors to be absolutely sure one of them is not suss, regardless of what your "readings" were.My "MAF" sensor fault ( contaminated by air filter oil.......by me ) gave exactly the same prob as you are showing. Ran like a chaff cutter.

[mad max]

I"d plug in a new MAS instead of trying two second hand ones but I"m a bit resistant to the price. -- $800+ for a glorified plastic baked bean can with a wire in the middle! Mind you I"ve already spent $270 on two second hand ones :-

[Disco]

Should a badly reading airflow meter cause injector number 4 to deliver too much fuel?

[mad max]

Good question Disco :-

[mad max]

Now I"ve got a diagnostic plug off a 1996 subaru and a LED check light to wire up to my EJ25 gyro, I took the plug to my nephews place and checked out his $3000 snap-on diagnostic machine and there"s no matching plugs. Plus I can"t find a circuit diagram to wire it in. : Back to the drawing board.

[Disco]

Theres usually some trick to cue the ecu to flash codes on the check engine light.

[birdy]

And who"d by a rotax.

[Russell]

some tossers do

[mad max]

Good thinking Disco, I"ll just wire the check light and go from there :-

[Russell]

Forgive me for saying it ......AGAIN........one by one change EVERY sensor with a KNOWN good one.........pewtar needs info.Pewtar is Ok.........as you have changed it with another one.......so it"s not pewter problem.I"de be double checking me "speed sensor" thingo........the one that tricks the pewtar that you are actually driving down the road.Maxy ol son..........boring ol day today.....flyin me **** red gyro around some lakes, up / over some mountains / in and out of gorges / along a river or 2 / clear as,smooth as............yea......boring ;D ;D

[mad max]

Good to hear you"re having a ball Russ. Was Lucy yarr-Hoowing with you? (Try parking your gyro outside your bedroom window) ;D Russ" old comrade, is it true that your gyro went through three mass air sensors before it ran properly? I"m trying to assess weather they are temperamental components or not as it is the only thing I can"t accurately test.

[Brian]

Should a badly reading airflow meter cause injector number 4 to deliver too much fuel?According to to what I understand, the above is true, this is what happens with the Nissan 3.0 litre /4 cylinder engine before number 4 lets go big time ! Modern engines, particularly those common rail high fuel

[Russell]

Good to hear you"re having a ball Russ. Was Lucy yarr-Hoowing with you? (Try parking your gyro outside your bedroom window) ;D Russ" old comrade, is it true that your gyro went through three mass air sensors before it ran properly? I"m trying to assess weather they are temperamental components or not as it is the only thing I can"t accurately test.Oil stuffs them.......real quick.....read a prev post of mine somewhere.......otherwise trouble free.Just thought.........unconnect EVERY elec plug, clean real good, reconnect. ( corrosion etc )Lucy........yea can"t shut her up..........i rekin she loves flying more than me........Had a life long dream to own me own yacht,( 50 footer + ) would sell all me toys as proof......she who must be obeyed, won"t have a bar of it.......so i"ll be dropping off the perch a sad man ( shattered )

[R Beadle]

Howdy Max. Can I ask a dumb question? Even though your problem sounds like sensors and computers ,how fresh is the fuel you are using? Can you vouch for the supplier of the fuel and its octane rating being what it should be. As a mechanical fitter who has done some stints out in the back country I have been caught out by this and in spite of a life time of mechanical work it was on two occasions the straw that broke the camel"s back when I was miles from anywhere. For the purpose of this forum covering everything and helping you to leave no stone unturned I have decided to ask the dumb question so that it can be totally eliminated or investigated. Beadle Bum.

[mad max]

G" Day RGbee, Some time ago I drained all the premium fuel and filled with new stuff. No improvement. Since burned up all the older fuel in my ea81 trainer and my 98 ford. - No probs. Russ didn"t actually answer my Question: Are you on your third Mass air sensor Russ? I sympathise with you Russ about the live on sailing life. Aviators often become mariners as they slow down. Look at Sir Frances Chichestor for e.g. I"d do it too but we have the same breed of women. (land lubbers) Allways an adventure sailing on big boats, dodging pirates, seeing the world. I"d like to sail around the world with three female crew. One asian, one african, and one European! (Maybe we can leave the old girls at home) ;D