I haven't checked anything yet, it was dark (11:00 PM) when it blew, and I've been at school and work ever since. I'm gonna look it over tomorrow, but I don't even know what to look for besides the MAP sensor hose.

I'd take it to Mazda, but I don't even know if it's gonna start again, and money is really tight w/the new engine, so I don't wanna pay to have it towed there to find out what I already know, if thats the case.

Boostin FD, I had no spikes, just a solid 10psi from a very late 5500 rpms on up (non-seq). It blew just after the 3-4 upshift, and admittedly, I wasn't looking at the boost guage right then, but I never had issues with spiking before.

I'll reply to this thread after I take a look at it tomorrow, I'll see it if starts, check the MAP sensor hose, I guess look over plugs/wires, and look for any loose hoses from the non-seq conversion.

 

That's exactly what happened to my engine two years ago. After it "died" I let the car sit for two months while I saved the 5 gs it would take to replace the engine.

Upon taking it to Mazda, I was told that a "valve" had simple gone bad, was charged $300 and left happy.

Now, I am aware that there probably was nothing wrong with the car except the map sensor and I was ripped off for $300, but I got the car back home and it's been fine since.

 

wait wait wait, exactly??? Smoke and all?? power loss, unable to build any boost, no idleing, exact same symptoms?

Wow, i might have hope looking into this tomorrow.

 

EXACTLY.

 

Well, after looking it over today, I found the following.

All necessary hoses that I can see are still attached, including MAP sensor. Spark plugs are visually OK, and wires are attached.

I attempted to start it again, and it did with some difficulty. I had to keep the throttle on the floor to get it to start, and after that I could keep it running by holding it up around 1500rpms. There was whitish/grey smoke coming from the under and behind the UIM.

What does white/grey smoke usually indicate?

There was also a strong fuel smell from right around the same area that persisted after the smoke (maybe 1-2 minutes).

I could be way off base here, but could I just have blown a fuel injector, or something of that type?

I've decided I am going to take it to Mazda on Weds. to do a compression test, but in the mean time does anyone have a valuable info?

 

don't the rubber O rings go bad on really really high mileage engines, causing loss of coolant and eventual death of the motor

 

O ring on the injector you mean? Should there be coolant in there to leak out? Shouldn't that stay in the coolant passages?

 

Sorry it didn't turn out to be simple.

 

nah, i remember reading about it on the SCC project 7 something bad happend to this rubber seal around the rotor housing caused loss of coolant, let me see if i can find this article for ya.

 

This is the next best thing i could fine, could this have been what went wrong on your car?

http://www.scuderiaciriani.com/rx7/o-ring_failure.html

 

I've seen my fair share of blown engines over the last 7 years (none on my FD though!) and I have NEVER seen "large clouds of smoke" in the engine bay with this sort of fault. I've even seen a motor blow the turbos clean off the motor, but that just made a mess

Dont get me wrong, heaps of throttle to hold idle is a very bad sign, but you cant just "throw a rotor" if you get what I mean.

Lets say it was a "blown motor" as everybody seems to think - where's the smoke coming from?

The nearest I can think of is a total failure of an oil seal on the compressor side of a turbo and the burning oil is blowing back?

-pete

 

From what I can tell, the smoke is coming from the back of the engine. It's billowing out from the backside of the UIM.

Even if it isn't an apex seal, say it is the oil seal, I need a rebuild anway, so KDR here I come.

 

It sounds like it could be, but the symptoms seem to indicate no smoke from the engine, i definitely have smoke.

 

When I blew mine last may I didn't have any smoke, but I did have all your other symptoms. My rear seal went, and my housing was shot Now I'm broke and having boost issues, but hey - I've my car back, right?