My turbo is fine as it hits 22psi as it did before and holds pretty well. Car all around seems to be ok. Maybe I had some bad gas or maybe something got in through the intake when I installed my drop in. I will monitor it and if I have any other issues I will post them.

Thanks for everyones feedback!

 

I agree. OP's question has been discussed. Thread closed.

Chris, Scott... you both have a lot to offer, leave the personal crap out of it.

 

So my situation, which I had a thread opened and then closed, is that I had the spark plug ground strap in one of the cylinders closed (#4). The piston looked "ok" with a borescope but is the damage really going to be that evident without pulling the head off? My guess is no.

I have spoken with someone else that had this same problem who has their car at Mitsu as we speak. Last fall they had the same problem I am having currently. Then after had to change his plugs 3 times before recently the car lost all compression in 1 cylinder and most in another. He had a problem with the car leaning out at wide open throttle. I am not sure if that is related.

Anyway I have to say that I was skeptical that this was the issue I was having but am pretty confident that it's dead on. My plan is to spend my Memorial Day Weekend pulling my mods off so that next week I can bring my car to Mitsu.

Mad_III you took your car to the dealer and they installed your own Ross Pistons and Manley Rods?? I wish I knew of a dealer near me that would do this.

 

This was the AMS car where we informed you of your problem and you thought "you'd be fine" ?

Not being condecending, just want to be sure we are talking about the same car here.

*edit* - NM, we looked it up. https://www.evolutionm.net/forums/ev...misfiring.html

Now we are all on the same page.

https://www.evolutionm.net/forums/7048195-post25.html

 

Yeah same car. That is my thread. It was hard for me to believe that
having a mild tune that peaks @ 22psi,
the fact that the car ran ok replacing the plug after the plug gap closed,
and that the piston looked ok using a borescope
that the top of the piston could have been dislodged.

Nor did I want to believe it

But after a while of thought, driving my car a bit, and after not fully closing the gap on the same plug but very close to it where the car idled like crap, I unfortunately realize that this is most likely my issue. So now I have to put in the work to go back to stock and get it in... to have a block that will have the pistons and rings with the same limitations??

 

What you want to believe and what the truth actually is don't always align.

You have done the forum a good deed by remaining honest. It is best for the forum that all the correct information is here so that others can learn from it. Its the foundation of an excellent and useful site.

 

Junction, thanks for updating us. I'm hoping you will take pic's of the engine internals as you open it up so that we can all see what happened.


Thank you

 

Don't be confused with detonation. Anyone that tells you that detonation is the cause of your problems has no idea what they are talking about. The pistons are also not weak and we have never stated such. As we have previously mentioned, we have had the 4b11 pistons inspected meticulously and with no signs of detonation and with that said, still seen the ring ends collide and the force the ring ends upward like a wedge on the ring land, chipping a piece off of the piston.

The top of the piston height has nothing to do with strength it dictates compression ratio, in case anyone was confused.

 

When I took my crushed spark plug out it had an indentation on it as if something hit it. I have heard something bouncing around in my engine. As of about 6 days ago it has made its way out. So now the car "appears" to run normal but I am not that naive. So we will see what the dealer has to say. They may be hesitant to take my engine apart since it appears to run ok currently although closing the grounding strap may be enough cause for them to be concerned enough to tear it down. We will have to see.

 

I would bridge it again and take it back.

We have a video cylinder borescope we use to view these types of things and take away the mystery of what is going on inside there. I would be reluctant to take someone's word for it if you have already had this type of thing done. You should inspect the piston tops yourself or borrow a video scope.

 

To me it appears any issues that the X's may be having are mostly due to some cars being a Friday car . Also I also think that not ALL X's have the same pistons . I know one of the motors that were being used at the training classes before the release of the car had other things which are not in the motor I have in my car now .

I guess we should ALL keep looking into the motors BEFORE we make-up our minds and try and make ALL findings the gospel .

..

 

Come on lets not turn this into a vendor battle again. This is a good thread.
This was not right after my flash this was right after me adding a drop in like 8 months after my AMS flash. Lets leave AMS out of it. Someone else I know had the same problem with the factory flash.

I have an appointment with AMS tomorrow so I will have them see what they can find. I just don't want to go too far into my pockets and discover my piston is toast and I need a rebuild which means it goes to the dealer anyway.

 

I hope we can keep it clean , for one I'm just posting more info to get more ideas out there . Now , SOME of the stock pistons have really hard edges on the valves releave which will cause detonation which is why engine builders de-burr the piston tops . If you notice that all pictures that have been posting of the stock pistons will have pitting in that area .



And yes lets ALL keep it clean



..

 

A drop in will have minute effects on performance due to the nature of the MAF sensor being a hotwire and not a karman vortex meter.

 

Great thread, this has me thinking about my future plans with the ride.