Stevie Ray

Renaissance is what they call the old 53. The H company occupies it.

Mazurfer

http://www.mazmart.com/PartsList.aspx?id=38&n=NEW&m=6

http://www.finishlineperformance.com...me.php?cat=273

http://www.trademotion.com/partlocat...layCatalogid=0


Non-stock = http://blackhaloracing.com/products-...nition-system/



Yes, there are also replacement ones available at Autozone, but I have no real data or feel for those.


Looking at that Mazmart page, the got coils, plugs, and wires all in one! yeah, $390.00 or $253.00 without the plugs.
But go ask the dealer what that would run at the delaership!

And if going that far, then you gotta at least consider the BHR kit, but not cheap. You get what you pay for though!

Mazurfer

Oh...got it!

Stevie Ray

Thanks everyone for the suggestions. Here is the next chapter.

Did the 20 stomp shuffle. It seems to accelerate more smoothly. I installed the OBDII gauge display (Ultra-Gauge $59, well worth it). I’m watching CAT temp, timing advance, short term fuel trim, O2 sensor voltage (not sure how to interpret this) and a few other misc parameters. No chance to see if the CAT glows yet; maybe this week. So far the CAT is running at 1680 degrees F in city driving. Have not had it on the highway with the “instrumentation” yet.

I have a two hour trip down I-95 end of this week. Along the trip, I’ll record the CAT temps over time, timing advance changes, O2 voltage changes, and fuel trim changes. I have a deal with the dealer to drive straight to his doorstep on the return trip, kidnap his best rotary tech and make him drive while the car is nice and hot and hopefully misbehaving.

Anyone have any suggestions for other parameters to measure that might help diagnose this problem?

I’m waiting on ignition coil replacement, not wanting to change much while diagnosing the primary issue.

Stevie Ray

Pics of the Ultra-Guage for those who are interested.


https://www.rx8club.com/album.php?al...ictureid=23974
https://www.rx8club.com/album.php?al...ictureid=23974

-=drift=-

Hello!

The more throaty sound, would you say it kinda sorta sounded like a subaru?
Mine sounds like its having a similar problem.
I read (On Racing beat web site, dyno flash specs page) that the cat should never be OVER 1650 degs. but even on the dyno, they didnt hit 1550.

FLYN8

I have exactly the same symptoms. At about 45 minutes at 80mph power begins to fade, no warning lights on the dash. Pinging sounds pronounced and acceleration is abysmal. Around town and short trips there is no indication of the problem. 36,000 miles on 2004 GT.

I'm very interested to see what you find...

Foxxman

...and my 05 80k miles has the exact same problems too. I had the CAT checked and the back pressure is alright. Even though the back pressure is alright, could it still be the CAT?

Please advise what you find....

lemonflavour

I have the exact same problem. Car will rattle for 10 seconds when I hit the light after the highway and go away after. It's quite bad sometimes. This only happens when I'm off the highway though... Keep us updated please!

Stevie Ray

I really don't have the pinging sound since I did the throttle body bypass mod which routes the engine coolant around the throttle body. This reduces the temp of the air entering the engine and eliminated nearly all my pinging (also called marbles in a can or MIAC).

There is a thread somewhere that details the throttle body bypass. I takes about 30 mins to do. I put some pics on my profile showing the results. By the way, don't use the colored plastic vacuum caps that are shown in the pics, they pop off when the air in the throttle body heats up and expands. The rubber ones won't come off. The shop was out of rubber caps when I first did the bypass. I've since replaced them.

I'll try to find the links for you.

Stevie Ray

Drift, Foxxman, FLYN8, Lemonflavour,

Here is the continuation of this thread with some more info.

https://www.rx8club.com/series-i-trouble-shooting-95/more-reduced-power-after-highway-driving-212525/

Stevie Ray

Checkout this thread discussing CAT temps.
https://www.rx8club.com/series-i-tech-garage-22/what-your-na-egts-212621/

re the Subaru sound question. Don't know what a Subaru sounds like.

Stevie Ray

Here is the throttle body bypass link.
http://www.rotaryinsider.com/diy-tac...pass-gap29.htm

mkmike103

iTrader: (3)

Stevie Ray- So what have you concluded? Is your cat dead, or are you leaning towards something else??

Stevie Ray

Check out this follow-on thread for some more data.
https://www.rx8club.com/showthread.php?t=212525

Also, Mazurfer started an Exhaust Temp thread:
https://www.rx8club.com/showthread.php?t=212621

In short, it doesn't seem my cat temps are out of line with the others. Also, the decarboning the dealer did seemd to help. I know I need to replace my ignition coils and wires since I have the originals. So I'm not sure what is happening but there are others with exactly the same problems.

I understand there is a problem with the factory fuel pump that seems to match my symptoms of low to no power at high speed when I floor it. I posted a pic of a spreadsheet of data in my photo album. Note the comment on the lower right that says "floored". I'll post a link in a minute. I'm starting to suspect a combination of problems: I-Coils, carbon deposits and fuel pump.

Stevie Ray

Here is the link to the spreadsheet pic.
https://www.rx8club.com/album.php?al...ictureid=24499

FLYN8

Okay, here is my update on reduced power; the dealer verified I had a power issue after I took the car in following a 150 mile road trip. They had me leave the car a few days later to do diagnostics including compression test. Their diagnosis is that the engine performs as it should on short trips, i.e. less than 50 miles. On longer trips the compression fades and one catalytic converter becomes a problem. So, Mazda is paying to replace my engine with a reman. with better seals and a new catalytic converter. I'm waiting on the parts now.

I have driven this car hard at times, but I don't race it and I never exceed redline. I have never used anything but premium gas and always the recommended oil, though I change oil at 5000 miles. I don't know what could have caused this, but I hope the new engine goes longer than 37,000 miles.

I'll update when I get the new engine...

FLYN8

I like this, maybe somebody could devise a way to route refrigerant through there...

Have you ever considered rerouting the heater core in summer months? It seems a waste to have to overcome the residual coolant going through the heater on cool days.

Stevie Ray

Did you see this thread for bypassing the heater core?
https://www.rx8club.com/showthread.p...er+core+bypass

I've thought about.

> MAO <

I have your same problem and this is the cause, atleast regarding my car:

poor oil comsumption

I probably have some "injectors" clogged. No particular issues while roaming around... but when I go for a longer trip or I consistently go for red line having fun, then everything appears: MIAC, loss of power, bad idle.

If I premix with 220-250cc in a full tank (I think they are like 8oz) then everything goes well forever.

I already removed OMP to check it, oil goes through it and lines appear to have oil inside... but my oil consumption is really low... so I think I really have one o more oil injectors f%&$£d up.

If you are not premixing, consider trying it cause if this solves all your problems then it's possible that you have my same problem... and a new engine won't help since omp lines and injectors are not changed with it!

I found a lot of infos here: https://www.rx8club.com/series-i-tech-garage-22/possible-new-renesis-engine-failure-theory-210194/

bse50

You may be simply running on a pretty old pcm flash with the wrong oil consumption tables, or have a worn omp shaft (hard to notice upon 1st visual inspection).
It's not sure but worth knowing that in case you go nuts trying to find your problem.
Go for a compression test while you're at it. Poor oil injection was the major cause for the early european engines biting the dust soon

pauleta

I've had this same problem on several occasions. Dealer told me it was the cat, loose pieces rattling around inside. The cat was replaced twice under warranty. I have an '04 with 49000 miles. Happened again last year, along with the car not starting when warm (ie stopping for gas), started fine after cooling. They did a full tuneup, plugs, wires, decarb, etc... replaced started with a modified high speed one.
Now again this past week I get the rattling and extreme loss of power, to the point I can't get it moving in first gear. It stalled and wouldn't start till it cooled. This happened a couple times. Engine light has been on and off. P2096 is the only code.

FLYN8

Blue Ridge Mazda installed my new engine and one cat. this week and I picked it up yesterday. The chirping noise is gone, and everything seems fine. I have driven it on a long trip (880mi) with no problems, also, I notice that there is more punch at low rpm. It was all paid for plus a rental, so I am pleased with the whole situation.

The dealer service manager tells me that the seals are of different design and the engine won't do this again. He also said that people looking at used RX-8s are beginning to ask if the engine upgrade has been done. I hope that means the resale value is higher..then again, I may never sell this car.

I'll update after my first long trip or if anything goes wrong.