Okay.. soo.. i have a 05 rx8. my old engine had low compression.. so mazda replaced it with a new one.. but they put a gen 2 engine in the car.. they wouldnt warenty the new engine unless they put the stock cat back on.. so they did.. i got my car back.. and it has a total lack of power from 1-9k rpms.. i put my turbo xs mid pipe back on to try and fix it and it didnt work.. here is a list of everything they replaced when they did the engine.. Ignition coils, (Engine sh) <- dont know what that is... Core Return <- the new engine, gasket set, oil change, oil filter, mazda cool <- dont know what that ment, rubber (R) rubber (L).. thats everything word for word from the report from mazda.. and the spark plugs.. and then something called Zoom Power.. under the sparplug report.. so my only guess now is injectors. other than that im ******* clueless.. this happend b4 with my old engine and it was the coils.. but they just replaced these ones.. and i have less than 500 miles on the new engine.. but i know its not the engine just breaking in because you dont go to a dealership buy a new car and have it run like ****.. so im out of ideas and i need help.. also would the injectors of the gen 2 rx8's be bigger than the gen 1's and mabye they just used the gen 1 injectors for the new engine and, mabye the injectors are just bad.. also where would i locate the injectors.. and how hard are they to replace.. and im sitll guna take out my coils and check them.. even though they are new.

 

as a follow up.. my exhaust dosnt back fire like it used to but the engines are pretty much identical.. so i know an engine running rich or lean can effect back fire.. so mabye the A/F ratio's are off.. but wouldnt have mazda known this??

 

You didn't get a Gen2 motor..you got a reman engine

If it has lack of power...take it back and get them to fix it.....if they can't..call MNAO and ask them where you should take it to get it fixed.

It is more likely that they screwed something up on the install than your injectors going bad...

 

they said they put a gen 2 motor in it.. and when i brought it to them about about the lack of power they said they didnt feel anything.

 

but yea im pretty shure i did get a gen 2.. because there is sooo much **** thats diffrent in the engine bay now than there was b4.. so much has changed in the look of the engine bay.

 

whats mnao

 

dannobre is right in saying that you didn't get a 2nd gen engine. It's impossible. If that's what they did, call MNAO (Mazda North America Operations). Do a google search how to contact them.

Also, I know that you're probably frustrated. But, you need to take a deep breath, stop rambling about things that may or may not be related to your issue (it's confusing to assist you with diagnosis), and start taking advice from this forum. There are many posts and threads that you could be reading to help you with your issue.
Have you even tried to contact the dealer that replaced your engine?

 

yea i brought it to them.. the guy said it was running flawlessly i about blew my top.. but if they said there is nothing wrong with it from their perspective.. they cant do anything to it.

 

okay so i just discorverd this new noise that might be the problem.. form 6-9k rmps the engine makes this deranged vibration almsot grumbling noise at full throttle.. so mabye it could be the alinment of a rod or something?

 

check coils, make sure plug wires are firmly seated, they should 'click' onto the spark plugs.

uhhh ... but you didn't go to the dealership to buy a new car .... you went to the dealership to get a "new" engine ....

 

well im glad to know there are other components in a car like seats, paint, and interrior that make a car run.... mabye the back bumper off a new car helps it run better aswell.. i honestly dont know how to replay to the stupidity of that answer.. if i go to a dealership to get a new engine.. it should run like a new car.. last i checked the body dosnt have to be new to make it run corectly...

 

reply

 

as for the coils they are all snug i checked those first thing

 

so you think you got a new engine huh..

 

yea they told me they put a series 2 engine in the car.. and it was new shiped from the factory. it cost 4 grand.

 

i just need help figuring this thing out.. it makes an extreeme noise from 6-9k rmps at full throttle... and idk if its a crank sense or off thats causing what seems like a vibration noise.. but when i have it from 6-9k rpms not at full throttle just putting the rpms in that range.. i dont get the noise sitting there just holding the rpms that high.. so it has to be something to do with the engine being at WOT

 

omg thats incredible

 

lol. new s2 engine. Full throttle to 9k on a new engine. Sounds like you're one of a kind, we won't be able to help.

Go to a different dealership and have them check it out.

 

I'd be careful dude, seriously. You could be right. It sounds like it might be getting ready to throw a rod. That's what happened to me! You need to take it back in and have th check the torque on all the rod bolts. As long as they're in there it wouldn't hurt to have them set the lash on all the valves too. Better safe than sorry.

 

i ******* hate stupid sarcastic people like you.. i spent 4 ******* grand and i know the car isnt running right i have a complete loss of power sinse i got the car when i brought it back to mazda the guys was like ahhh its fine.. and i was like are you ******* kidding... and if i drive it hard at all i get all the problems ive already listed seriously if your not guna ******* post something that could help me dont ******* post.. they put the old cat coverter on so they could warenty the new engine.. one of the guys told me throw your turbo xs mid pipe back on and see if it help.. but it didnt. i still get a delay after shifts and the power the does kick in after the delay is still lack luster. and from 6-9k rpms it sounds like the engine is makeing the most extreemly deranged vibration noise ever like its just sputtering extreemly fast... i honestly dont know how to explain what it sounds like.

 

What you need to do is take very clear detailed pictures of your engine bay and where the oil filter is located.

Then you need to call mazda national headquarters and tell them that you have spent allot of money on this car and need to find a competent service center. You need a free diagnostic and compression test performed.

Side note... I have no idea where you would find a rod in a rotary engine. You might find some bolts, and some seals, a few valves in the intake manifold. But there are no rods... at all ever.

 

OK same post minus sarcasm:

It is impossible for an S2 engine to run off of the stock S1 ecu. You did not get an S2 engine.

Running a brand new engine to redline at full throttle is just asking for trouble. Doing it repeatedly is even dumber. Welcome to likely ruining your new engine.

If you spent $4k, you probably should have done some research. Don't be mad at anyone here because YOU didn't do any research.

Take your car to another dealership and call MNAO.

Your posts are terribly hard to read, have run on sentences, and are not terribly clear. You are too busy replying here and trying to call out people for being sarcastic that you aren't reading what is being said. The same advice has been given multiple times. What answer are you looking for? There's no magic switch that makes the engine run properly, and since you can't calm down and articulate your issue so that we can actually understand, we might as well hope for a magic switch as well. You should never ask a question if you're going to argue with the answer.

 

niiiiccceee, i doubt they want to help now that you said this.

anyway you didnt get a s2 engine just fyi. How old is the engine? do you even know what a break in period is? i would stop taking it up to 9k

 

what research was there to be done. ive been on these forms for the past 3 days non stop how can you sit here and tell me what i have and havnt done..?? im not aguing with any answers i get.. i argued with your stupid sarcastic remark..

 

well engine break in would be one thing to research.

what MNAO is would be another

The warranty replacement threads are abundant as well.

The differences between the s1 and s2 engines and ecu's, and the multiple threads asking why it won't work.

It appears you've read nothing on those subjects, therefore it's fair to assume that you didn't research anything. In case you haven't noticed, i've answered your question and you've been told what to do by others. Why do you keep posting the same question over and over?