Hello I have a 04 rx8 manual transmission; I just bought it like 1 month ago; and Al the sudden I 🌟 to have this problema, I START THE MOTOR PERFECT WAIT FOR IT TO HEAT UP NO PROBLEM!! BUT WHEN I START TO ROLL THE REVS WON'T GO MORE THAN 5000 AND NO MORE THAN 15 OR 30 MILES!! YESTERDAY I INSTAL NEW COILS AND NEW SPARK PLUGS!! DISCONNECT THE BATTERY A LOT OF TIMES AND NOTHING!! A MECANIC THAT I CALL TOLD ME THAT IS THE COMPUTER BELOW THE DASH THAT IS NOT READING​ THE MAF SENSOR AND NEED TO BE REBUILD AND IS ARROUND $530 DOLLARS!!.. ANY SUGGESTIONS FROM SOMEONE EXPERIENCE MY SAME PROBLEM! IT LOOKS LIKE THE CAR IS IN LIMP MODE!!
I NEED HELP HE'S MY DALY RIDE.

 

I don't know what you mechanic is talking about, and I'm pretty sure neither does he. There is no computer under the dash.

The best thing you can do is get the actual check engine codes the computer is throwing and post them here. Then we can narrow down what the problem is.

Limp mode is most often caused by a malfunction in the oil metering pump. Could be as simple as a loose connector.

If he's talking about the MAF, check that the MAF is plugged in, since you must have had the intake apart to install coils and spark plugs.

 

Take the rubber intake bellows off and see if the throttle plate opens fully. If you have a scanner you can check the throttle position and see the same thing. To me it sounds like you are in limp mode. The most likely reason is the oil metering pump as Loki said.

Read up on the positioning switch....you might get it to work by adjusting it

 

Thanks guys I will check those tomorrow and also someone told me to chek all the vacuums over the intake beicause if one vacuum is open also goes on limp mode. If that is true or not I don't know. Please help and more than thanks.

 

The only things that will cause limp mode are Coolant temp sensor and OMP. The throttle system will also cause issues...but I have never seen a failure that didn't throw a CEL light

Vac leaks will usually throw a lean code...bUT that won't cause a limp mode failure

 

The only things that will cause limp mode are Coolant temp sensor and OMP. The throttle system will also cause issues...but I have never seen a failure that didn't throw a CEL light

Vac leaks will usually throw a lean code...bUT that won't cause a limp mode failure

 

Hello guys just wanted to let know that I clean my oil pump sensor and the Rx8 was doing the same; clean the catalyst and the same so I taught in the file system and bought a LUCA'S INJECTOR CLEANER PLUS A LITTLE MORE OF OIL IN THE THANK I USED (KOLT) 2 CYCLE OIL OR SOMETHING LIKE THAT NAME AND I LET THE CAR SEAT ON FOR 15 MIN SO THE FULE PUMP CAN CLEAN AND CIRCULATE ALL THE LIQUIDS AND THANKS (GOD) WALAAAA!! APPARENTLY THE HIGH INJECTORS WHERE STUCK AND NOW IS CLEAN AND WORKI G GOOD!! KNOCK ON WOOD!!!.. CONTINUE WELL..
THANKS GUY'S..

 

That... sounds very strange, but OK. Let us know if the fix is permanent.

 

For me sounds the same super strange but is working fin, hahaha but check engine light stills ON tomorrow I will take it to the machine to see witch codes throw and I will keep posting about the problem and if the car continue good or with the same problem.

 

So I woke up turn the car on for a drive and Rx8 the same problem!!! I will try seafoam today

 

Don't bother with Seafoam, this isn't a Seafoam size problem. Go get the code scanned, your answer is in there.

 

Yes, codes first.

 

I believe its the catalytic converter, you could unbolt the exhaust just after the down pipe and take it for a spin if the problem goes away and stays away you know that the cat wasn't allowing air flow. Seen people trying to clean cats with chemicals and fuel treatments, I think that's more of preventative maintenance and doesn't help much if your already way to clogged but who knows.