This is what happen to my engine(read please)

[Aliakeel]

Basically I been told after the remap to change my back box and the plugs to 10s and drive it normal till the next remap ,beside the car was running bit rough and high to 1300 1400 rpm before I change them,also I discover a burst hose and exhaust leak from the turbo manifold and small leak from the joint between the mid pipe and down pipe but I got sorted after the car remapped then I have changed the back box to 3 inch straight throw and the plugs to 10s and clean the ISC and when I start the car the idle very low like 400 and then I tried to adjust the screw and start the idle rise a bit till it settle to 1000 and the car was very smooth but low idle what is should be then I drove the car to the gym witches not far and on very normal speed no rev or high boost at all comes to the traffic first gear and the car lost power and sound like tractor and it get worse in noise if I rev it more than 2000 so I turned back to my house all way on first gear doing 10 mph can\'t go more than that with very load noise comes out the exhaust pulled home and I opened the bonnet the engine rattle and shakes badly and the idle stuck on 1500 with no smoke or anything all oil pressure and water temp and injectors reading normal a part from the engine rattle, noise if I rev it, and no power at all.
Done compression test rear rotor 0 compression and the front still very strong.
But the car still turn over easy before I take the engine a part any idea what might happen here please it\'s very weird situation .

[Aliakeel]

I know maybe most people gonna say the rear tip gone but I wanna know why this happen after I changed the spark plugs and clean the ISC then start the car very low idle 400 or 500 and then I adjust the screw rise to 1000 smooth then drove normal and then lost power with load noise and engine rattle and shakes badly ..

[BlitzBoy]

the engine maybe already on its way out, eg if there was a crack in the apex seal it may have dislodged itself.

How old is the engine, spec? what does your mapper think could be wrong?

[Aliakeel]

Right the engine was rebuild in 2010 with reworx  and when I bought the car went for project (veilside) for 11 months then got back last winter and I went away for two months so it sat down again so all together I would say the engine done 3 to 4000 max since rebuild ,Jay don\'t reply to me kareem don\'t know either and I\'m getting confused here trying to analyse things before I took it a part,I will rebuild the engine no problem but I wanna know what\'s went wrong after the new plugs fitted and fix few leaks..

[Aliakeel]

The engine is large port with racing internal like reworx said to me...
I

[Grant Monkhouse]

Is that the rotor where you dropped part of the diffuser into?

[BlitzBoy]

you could have always had a wiring fault which has reared its head and lunched your engine, many causes that can blow the engine

[BlitzBoy]

Is that the rotor where you dropped part of the diffuser into?

diffuser?

well if a diffuser has gone through the engine its only a matter of time it was going to go

[davehg]

This quite possibly links back to all the comments left in the other thread about dropping a diffuser into the engine then turning the engine over. It could however of been something as simple as a plug lead not fully on a plug after changing them.

[clive]

Sadly no matter what its got to come apart anyway so evidence of the true cause  should be found then

[Grant Monkhouse]

Ali did get it back out but if it was in that rotor housing then it could have caused something that\'s lead towards this situation.

Engine out I\'m afraid, or a proper Mazda compression test to be exactly sure

[Aliakeel]

Maybe the leading coil or trailing not getting single from the ecu and it runs on one rotor I been seeing some videos rx7 runs on one rotor with no rattling or load noise from the exhaust I know the rear rotor reads 0 compresstion but I still don\'t know what happen,this is happen after I put the 10s in and start the car with very low idle 500 and then I adjust the screw on the throttle start rise and settle on 1000 smooth then I drove a bout 200 meter and lost power and load noise I can\'t even rev it to 3000

[Grant Monkhouse]

Have you got the plug leads on the right way?

[Aliakeel]

Ok I only broke the lower half part the diffuser and then I took it out from the turbo manifold so maybe I missed very small bits in but I couldn\'t find ,we remapped the car and drove back 4 hours and drive for a week after with no problem only rough idle due to some leaks I found and sorted but it need to be remapped on new condition

[BlitzBoy]

Dude that engine is fubarred , a dropped diffuser in the engine is a ticking time bomb, it might not go straight away but it will go.

If you put a piston engine tester on there and its reading nothing I am afraid 2 out the 3 apex seals are gone, probably debris from the diffuser worked its way into the apex seal grroves