Allright the basic story is, my car ran fine for 100,000 miles then randomly started running very vey bad, then within 5 minets smoke from everywhere and I towed it. Ok So now I found there is absolutly NO compression on the front rotor. I mean the gauge does not even move on any of the pulses. The rear rotor seems fine but its hard to tell with my primative gauge. But with both top spark plugs removed the back is shooting air like crazy and the front is barly a puff. Anyway what can cause this to happen so suddenly, what went out? From what I fave read if an apex seal went out there would still be one out of 3 strong blips. Thanks for any help/advice

 

When one OEM apex seal goes, it shatters, and takes out the rotor, rotor housings, and othe apex seals with it. Hence no compression on any face.

 

well that makes sence... but how could smoke comming from the engine compartment be explained? could the burning oil be comming out of the air intake?

 

I lost all compression on my front rotor not to long ago but it didnt smoke from there maybe a seal between the housing and iron blew I havent heard of this before but maybe it is possable. I also just got a re engine were the front rotor would give me three good pops and the rear would give me two I thought if a apex went out then two chambers would loose compression. Dont know if I helped any but just my .02.

 

The motor is dead...for whatever reason.
I dunno what you're looking for, but arguing what went wrong is kinda moot?
Either get rid of the car or get the engine fixed...


-Ted

 

Getting rid of the car is "not an option" but the reason for me trying to figure out what caused it and the somke and all is to try to keep it from happening again. I was afraid something happend like... the fuel injectors got clogged or there is some other problem whick cut fuel to the rotor and leaned it out and destroyed it. When I rebuild it I want to keep the same problem from happening again.

 

Is this possible? I don't know, maybe someone else can anser this but it is a good idea.

 

What was the total mileage on the engine?
All you mention was that the car ran fine for 100k miles - does that mean you put on 100k miles total since you bought the car new or are we talking about added mileage?

Has the car been maintained correctly?
If it hasn't, if the motor popped over 100k miles, it's no surprising.

When a rotary engine blows, it gives very little warning.

How do you suspect the fuel injectors are clogged?
Try and get them professionally cleaned by a shop that does pre and post spray pattern analysis - this should confirm your suspicions.
I highly doubt this is the case though.


-Ted

 

As has been previously stated, it's pretty easy to to lose all the seals on one rotor... Consider it dead, tear it out, and rebuild!

Alright, seriously, am I the only one who see's sponsored links all of a sudden?

 

Nope, I see them all too. It is pissing me off because my mouse hits one and I can't read the post. LOL.

Look at the "Race Car Tech" section on the main front page. There is even a "sponsored link" there too! hahahaha

 

Yeah, it's bullshit.
I started a thread in the Suggestion section...


-Ted

 

Read the thread in the lounge Ted, it's not going away, and also you can read my how-to on getting rid of it.

 

GET AWAY FROM ME YOU SPONSORD LINKS

 

Read this thread: https://www.rx7club.com/lounge-192/wtf-up-green-text-464827/

 

allright, the Toatal milage is 101,800 miles as it sits. I bought it at 85,000 miles and changed the oil every 3,500 miles and have reason to belive it was changed every 4k before that. Anyway the reason I wanted to make sure that something else did not cause the blowout is so it does not happen again. When the it forst started running poorly, it felt like a fuel problem so I read in the book the test (jump the yellow 2 prong connector and the fuel pump should stay on for about 3 sec. thhen turn off when the system is pressurized.) anyway the fuel pump came on and never turned off, so I thought maybe the engine was flooding b/c the sensor was broken and the fuel pump was staying on. <This theory is probly wrong but just an idea.
Thanks for the help

 

This is exactly what i'm planning. I'm just trying to check and see of what destroyed this engine to keep it from destroying the next one. (my right foot may be the problem )

 

There is a slight possibility that your injectors were so clogged it leaned up and detonated, but prob not. As ted said, send them to a place that does before and after flow tests to compare. www.cruzinperformance.com did a good job for me. Other than that, it was prob bad maintenance from the previous owner (the oil should be changed at least every 3k miles, with oil being added in between). Just for kicks, check and see if the oil is low. I just thank God I didnt have stock seals when my apex seal blew.

 

allrigh, I'll probly get the injectors checked out during the rebuild then, Yeah funny enough I checked the oil the same morning it went out . When it started acting up I checked again, it was fine. oh well that's how it works.
BTW: Is there some simple injector test just to give an idea if they may be screwed? Like something at home and slightly ghetto?