Hey guys, I need some help! I have a s5 TII. Well one night Me and UniqueTII put on my downpipe and midpipe and I was driving home when I decided to get on it and see what she's got! Well I red lined 4 gears and she was screaming but then she started running really bad!



She will start and idle but there is no power and it smells like it's running on pure fuel with plenty to spare. My gas milage is like 5mpg now. And it sound kinda funny when its running. We thought it might be an ecu problem. What do y'all think? She also spits flames like crazy and backfires.



Me and unique tii replaced ALL the vacum lines even took off the uim and replaced that gasket. NOTHING!?!?!? Can you help?

https://www.nopistons.com/forums/pub...O_DIR#>/11.gif https://www.nopistons.com/forums/pub...IR#>/dunno.gif https://www.nopistons.com/forums/pub...O_DIR#>/11.gif

also we checked the tid and intercooler and all of those. The turbo spools just fine as well. ODD!

Sounds like a blown engine syndrone. Happens especially after putting a huge downpipe and no fuel upgrades.



C https://www.nopistons.com/forums/pub...R#>/violin.gif

Sorry for giving you such a hard reply but it sounds like blown. Does it just idle like blah blah blah, do a compression test.



C

well it idles pretty good, no help needed to keep it running. i'm not too sure how to do a compressing test on a rotary, can I use a standard tester? Or is there a special rotary tester?

and what numbers should I have as far as compression goes?

You can do a crude test, take a trailing spark plug out and see if you hear even compression.



Do one rotor at time with the help of someone else. You can use your finger to plug the hole, your finger should feel pressure hard, to hear and feel the pulsation.



You are first checking for even pulsations, if you don't have even pulsationg or no pulsations at all, is blown.



Look at the spark plugs too. IF the rotor doesn't have compression and the sparkplug is black from that chamber, is blown.



C

yeah that sounds like what happened when i blew my engine in my old TII. revved out 3 gears on the drag strip then let off the gas it died and never started again LOL



you can use a regular compression tester just take out the little shrader valve but the po man's compression test works good too https://www.nopistons.com/forums/pub...DIR#>/wink.png

well I have a compression testor, will it work?

Sure, just have to hold the bleed button down and watch the bounces. As long as it had the right thread for the spark plug hole too.

ok well i'm two sceonds from selling it. Any buyers? It's just a thought!

do the test in the leading holes?

I'm sorry, trailing. Did i say leading. Same thing put trailing will put out the most.

ok so I pulled the leading plugs, the rear rotor plug looked great! Didn't even look used, looked like brand new, still shiney brass and the platnium spark thing is still white. But the front rotor was pitch black. Looks aweful! there is only about an hour of running time on these plugs. I mean the front rotor plug is about as bad as I have ever seen a plug. So she's blown 'eh?

this doesn't look good for you.............................................



umm if your gonna sell its not even worth it.... a blown rx7 is not worth alot....

sounds like a very dead engine to me... you can pull a plug and have sombody turn the engine over and listen to the pulses.. If it goes pshhh puh puh.. it's dead, since it idols fairly well you may have just burn the tip of apex seal... What evey you do, don't get on it or you'll tear the rest of the apex's up and most definitly kill the rotor and housing for sure, if they arn't already dead...



The finger on the spark plug method also works well.. I've just had a bad experiance with a near by plug wire trying to stop my heart from beating before.. https://www.nopistons.com/forums/pub...O_DIR#>/11.gif

Pull the ign fuse before you do it.. https://www.nopistons.com/forums/pub...#>/biggrin.png

yeah i always pull the ignition fuse unless you want to look like albert einstein https://www.nopistons.com/forums/pub...IR#>/boink.gif

were can I find a good price on a long block 13b? I figure scence I have the cash and 80k mi. I might as well get a tough long block. You know kind of a tougher engine, 3mm apex ect.

you guys are great thanx for helping me out. I've only been in the rotary scene a year. Much props to you Vosko, you've always helped me out on just about every post I write.

http://www.pineappleracing.com can build you a mean engine. jr's does an awesome job but i don't think you want to goto NJ https://www.nopistons.com/forums/pub...DIR#>/wink.png

Sorry for the confirmed kill. If you are looking for a quick fix, get a jspec engine. But like V said, get it rebuild and upgraded.



C

Did you confirmed you had compression or even bounces in the front?

lol.. Nopistons is like vosko's home.. he lives here.. https://www.nopistons.com/forums/pub...#>/BURNOUT.gif

ok well it looks like I DO have compression on both rotors. E.C.U.? Injectors? Who knows!!!

ill take it off ur hands...=)



ship it to me and its outta ur hands...lol =)

How come when something goes wrong, everyone on this forum always jumps on the BLOWN ENGINE bandwagon. "My tire pressure is low"........."Must be a blown engine" You could very well have a stuck fuel injector dumping hordes of fuel. Which would equal to less power, and obviously a overly rich mixture. An engine which once had both primary injectors stuck open gave every characteristic of a blown motor. But it had good compression.

It could also be the coil.....check for spark.

This one is rare but make sure your intake isn't clogged up with OH lets say a rag. Don't ask me about that.

spark is great, intake is clear, i'm thinking fuel system, the filter is stock, I might clean that out or replace it seeing as how it's 13 years old.

do you get any engine codes? do you know how to check them? hook a wire from the initial set connector to the negative battery terminal and turn the key to on (not to fully start)...if there are error codes stored, the check engine light will flash a code (a tutorial can be found here www.1300cc.com )



when my TPS went bad...it idled fine...but would backfire, hesitated...and had no power....but didn't run totally rich like you say.



i'd think that if it idles fine and you don't need to keep your foot on the gas to hold it, its not blown...



good luck!

Same this is my home away from home. https://www.nopistons.com/forums/pub...#>/biggrin.png

I didn't jump on the blown engine bandwagon...I suggested that the front rotor got washed with fuel and that killed the compression. We'll have to wait until he gets a working ECU and see what happens.

If you just burnt the corner off of a Apex seal from going a little lean it will do what your experiancing and still idol fairly decent and seem like it still has compression.. The only way to really tell in this case is to have it actually tested on a comprssion tester at mazda... :squint: $ :squint:

Due to the way it happend this is what it sounds like... Free up exaust flow and railing it threw 4th gear with no fuel mods will get very hot under high load = dead engine.... Of course it could be somthing else, but in this instance that's what it sounds like.

I think Matt is just looking for an excuse to go with a street ported engine. https://www.nopistons.com/forums/pub...#>/biggrin.png



If it is blown, it'll be a live and learn experience. If not, he said he's going with fuel system mods anyway.

wow stock fuel filter.......that's scary. Check the codes.

codes say the little plug in thingy on the uim, it's not pluged in, but I hear it dosen't need to be. That's it!

do you have compression numbers?

i just go by luck. most rotary owners have no luck so its usually a blown engine LOL

few people seem to be positive here. If they state: "car won't start" yeah it could be a blown motor, but chances are it's not. Certain members here including myself have experienced a blown motor, but come across like they are bitter and would like others to be the same. It sucks i know, but lets try to be a little more positive. I'm not singling out anyone on this thread, this is a forum based general coment.

1revin7: what the hell are you talking about man. thingy???????? let me know, and i'll try to be of some help.

I personally love it when its something simple and always look to rule out the simple things!



I bought that GXL I sold over the summer not running, guy thought the engine was bad, some peeking around under the hood raised doubts as to the guys mechanical abilities, towed the car home and one simple thing let to another and the car ran beautifully, invested a mere $200 with getting the seats re-stitched, tune up, coolant/thermostat change, running an ad in the paper, and a good wash and vacuum and I made $800 profit on the car.