Hey guys update:

Got the car back. The whine is gone and the test pipe sounds amazing. Turns out the cat was an aftermarket version of some sort, and was not clogged. Maybe worth something? Anyway I have amazing shifts and amazing power and no cels to speak of. Up until about 6k rpm.

About that rpm after driving for 30 mins, it seems like it stumbles and falls on its face. If I let off it will be fine until about 6 grand again. I pulled over and filled with fresh 93 octane and the problem was non existant until about 10-15 mins worth of driving.

I got her home and let her idle for 5 mins. It died idling and started right back up no issues. I took it for a cruise and all was well. I got it back home and shell rev to 8k all day while in neutral or park and not stumble at all. Sounds amazing! I believe the 180k mile old fuel pump is worn out.

Do you guys concur or do you have different ideas or opinions. All ideas and opinions are greatly appreciated!!!

 

More info

Took car to work on this cool morning. Has great power till about 6500-7000rpm and she starts to flutter just a little bit. But I can still pull to 7500 rpm redline. Car has not died on me as of today.

 

Haven't really kept on thread lately but SSV sticking? You got some secondary ports that open up around that RPM level(I belileve) that you are talking about.
Recomend you do some searches on "Sticking SSV" and see if that helps. https://www.rx8club.com/do-yourself-...-video-184663/
It just doesn't sound like fuel pump to me at the moment, but then again................what do I know?

 

Still sounds like a bad fuel pump to me...

 

Remove the entire upper intake manifold and check to see if any of your Vac lines are unplugged. The SSV can cause the sputtering sensation from about 4k and randomly to 7k. The fuel pump can cause the same issue. I had power loss from about 5k-7k and for the life of me could not figure it out as my gauges/scanner were showing normal numbers for some reason and no codes.

My cat was clean and drove around on low fuel but nothing. I finally decided to really dig and retrace my steps and found a stupid little line unplugged from when I replaced the SSV. The difference litterally was night and day!

 

Thanks guys for all the notes. I'll dig into the ssv some more. Another note: it bogged on me yesterday around 2.5-3k rpm and would go no higher. Stalled and I cranked her right back up. Got out of the rush hour jam, and went and got fuel. Problem was gone until I got home.

 

I'm having wierd power loss with mine, replaced the pump already, all ignition stuff is good(new). Doesn't make noises but has wierd stumbly power loss, seems to only happen past quarter throttle. If I feather it I can redline it without an issue, slowly. Cat doesn't seem hot after a long drive, good mpg(for an rx8) and no starting issues.

 

Hopefully not thread-jacking here, but I'm having similar issues. Was heading home today and initially noticed a little unevenness while just maintaining speed. Stopped at a light and noticed that it was shakier than usual with the A/C on (secondary issue - likely need new motor mounts). Turned the A/C off and the shakiness didn't go away. Light turned green, tried to take off and no power, almost stalled - put the clutch in and tried again - same thing, got moving, then things got really lunge-y, then the car died. Got it re-started and made it across the intersection only to have the lunging return, then die. This time it was hard to start. Let it sit for a couple of minutes, then it restarted. Started cruising down the median with the flashers, with it hiccupping and lunging. Died once more, but restarted while coasting. Long story short, made it home, died 4-5 times during the process. When it ran, power was normal. When it got to hiccupping/lunging, it felt like all or nothing. Revved it up some while sitting in the garage and it sounded like it stuttered some. The temp light flashed on for a second, then went off while doing that. Fans were running low speed when I shut it off. No CEL at any time during this. Borrowing a scan tool tomorrow. Could take the ScanGauge out of the 6, but I'm hoping for a little more info out of the scan tool.

Reading the posts above, I'm thinking fuel pump or something with the throttle. Car is a 2004 with 71K on it. New plugs, coils, wires at about 60K. (That was my initiation into the family of RX-8 glitches).

Today was the warmest day of the year so far. About 3/8 tank of gas in the car. I have been lazy about keeping it above 1/4 lately so I wonder if I've cooked the pump.

What is the group's thoughts on my situation?

With the scan tool, would fuel pressure be a monitored function in OBD?

 

http://s39.photobucket.com/user/murd...80819.mp4.html






Bump. Little update for the the thread. This video was taken a Couple of days ago. I was feathering the throttle just enough to keep speed. She bogged down and eventually died. This was taken cruising down the interstate for 20 mins no problems before this trip. The car started after about 5 attempts and I took her all the way to redline no issues after and merged back on. She eventually died on me about 30 mins later again before I got her home.

 

Update bump

Car is finally fixed. Will update soon with notes and pics

 

Here was the problem as suggested way earlier in the thread

Replaced fuel pump with new OEM Aaram pump. Sock would not come clean. I bought an airtex brand that matched the pump shell and reassembled. Car runs like a top.

However it did go into limp mode on me twice for a short minute since i have done this yesterday. Other wise car rums awesome. No more stalling or dying. And i finally get to here the rotary scream at 8k with a mid pipe. Sounds so awesome. Code pulled while in limp mode was p0455. Evap leak. Any ideas

 

It appears to only be doing this on start up. Problem goes away eventually of I shut off and restart

 

It does sound like a fuel starvation issue. Unfortunately the ODB2 doesn't really provide information in regards to the pressure levels on series 1. I guess the best way to narrow down if it's fuel pump related you might want to run it hard with 1/4 of tank and see if the issue appears. If it does, then top it off and see if that fixes the problem temporarily.

As far as the temp light it might just be a bad level sensor but make sure you keep on eye on the coolant levels. Also, when you turn it on in the morning you might want to check if there is a gargling sound coming behind the car stereo. This is usually a sign of an air pocket that might increase engine temps.

 

Awesome, for code p0455 just make sure that the fuel pump ring is sealed all the way down and that the gas cap is tight too. This code usually comes up if there is a vapor leak somewhere.

 

Well now it appears I may have an omp issue. The car will go into limp mode 5x out of 10 on start up. No codes and is intermittent. I've been monitoring oil and it seems normal.

Any suggestions

 

Hello, I hate to butt in, but I don't quite understand, could you specify air pocket please?
Is it the cooling system? Is this common; how does it happen; how do you correct it?
Thanks.

 

While you can not monitor fuel pressure via OBD2, there is something else you can use... Air / Fuel Ratios. A dieing fuel pump will give lean a/fs in high rpm/load conditions. Thats how I found out mine was dieing.

 

I wish I would have known this. None the less mine is fixed finally... Well the pump is. Now onto the next issue

 

I assume you need an Accessport to monitor A/F ratios - a normal scan tool won't show that? I have borrowed an Actron scan tool that has an "O2 Monitor Tests" function. Maybe shows A/F ratios? Need to download a manual. . . .

I did check codes and it pulled a pending P0171 - Bank 1 system too lean. That supports your A/F ratio theory.

Based on that, and my experiences, I'm looking into fuel pumps. Trying to decide between a stock replacement Airtex one from Rock Auto and retrofitting a S2 pump if I can find a good used one. I intend to track this car, so I lean towards the S2 pump.

Thanks for the feedback y'all!

 

I can pull A/F's from my good box, cobb and cheapo harbor freight reader. For the scanner it's in "Live data feed", that "O2 Monitor Test" does not work on mine either.

 

Update

I tried adjusting the OMP with no luck. Now I can't get it out of limp mode at all :-(
I now have to take the 8 back to Mazda. Unfortunately I will most likely be selling the car after she gets repaired for the 4th time. Do i have a lemon/bad luck or is fuel pump, tranny, and omp routine maintenance?

This is a huge dissapointment, because when shes running right it makes me grin from ear to ear.

 

Thanks! I'll definitely be checking that out this weekend. Might even hook it up and drive it to work tomorrow.

 

Hey i finally got back on the forum. But still with no answers...I too am taking my 8 to mazda and when it is fix i also will be selling it. I went ahead and bought a motorcycle...I'm done with Rx8's

 

I feel your pain man :/ I just put a lot of money into this thing and while its running better a mother freaking ssv solenoid decided to **** the bed on me :-( its almost like something every week breaks on this car. I want to sell it but having a hard time finding anyone that is interested in it. However even though it frustrates the hell out of me, I still somehow get a big smile when I drive it.

 

What about injectors? Mazda told me its my injectors and they wanted 1500 bucks! My new Reman haas 700 miles on it and Mazda had to call there chat line to come to that concluesion! I asked them about my fule pump but he handed me a papper and said all looks good! We think its your injectors! so......Im trying to pull them this weekend if i can get to them! oh... they said it the 2 secondary that are bad!they work on hi rpms... I hope this helps some one and me...