06 Rx-8 start and idle problem

jking01 · 03-11-2011, 01:22 PM

I recently bought a 2006 rx-8, now im having problems with starting it. It starts rough and idles high then dies out. If i give it gas it will stay running, can anyone let me know whats wrong with it. I would like to try and fix it myself before bringing it in. Ive heard it could be the apex seals are worn out aswell. Am i better off rebuilding the engine ?

Thanks

J.king

jking01 · 03-11-2011, 01:47 PM

could it be a fuel injection problem ?

djmtsu · 03-12-2011, 08:41 AM

Coils and plugs are you enemy with a Renesis.

Get a compression test first and foremost. Do NOT spend money on coils and plugs unless you just want to spend the $$$.

Test compression, and test the coolant system. Trust me.

Next in line is the fuel pump. Mine died right before I sold my RX-8.

diabolical1 · 03-13-2011, 02:52 PM

was it doing this when you bought it or is this a new development?

as said above, check your compression. however, another possibility is your catalyst (because of your coils). when my cat died a few years ago, my car exhibited the same type of behavior.

Redshft · 03-13-2011, 03:19 PM

Is the car throwing any codes at all? The RX8 is pretty wired up so a lot of problems will have a code in the computer. (eg. when my coils died, I was getting a Random Misfire code.)

Sephitrask · 03-15-2011, 10:32 AM

When you say it starts rough, do you mean it is difficult, or that it shakes? Have you changed anything on the car since you bought it? is it stock? What is the mileage? Any idea on the maintenance history (engine previously replaced, cat, coils, oils and fluids, etc) IF it is a hard start, Before you get a compression test check and see if you have the revised starter, then get the test done. Also check for vacuum leaks, they can cause it to choke like that as well. If all those items check out, there is a good chance its your coils. FYI, Oreilys carries the updated coils for our car for $33, half the dealer price. And they are the same part from the dealer, same stamp on the side, from the same plant, just without the dealer markup. They also carry our spark plugs for $20.

stinksause · 11-14-2011, 02:20 AM

yeah ... rx8 parts are expensive .... your engine may be blown ... do what the others said

lee · 08-11-2012, 04:22 PM

hi guys, just bought my rx8 2005 its a South African model, not sure the difference btween the left hand drive..anyways.. it takes a while to start & its idle is irregular, backfires like crazy!! what could it b b4 i take it 4 diagnostics?

Sephitrask · 08-11-2012, 11:00 PM

Quote:

Originally Posted by lee

hi guys, just bought my rx8 2005 its a South African model, not sure the difference btween the left hand drive..anyways.. it takes a while to start & its idle is irregular, backfires like crazy!! what could it b b4 i take it 4 diagnostics?

It could be a bunch of stuff. See my post above. Did/does it have a check engine light? If so what is the code? mileage, maintenance, blahblahblah.... help us help you...

GaryBuster · 01-11-2013, 12:38 AM

IF the car has been "worked on", here's a story for you.... MY history is with RIP it in Ok City... they miswired the second stage fuel injectors with the first stage.... we went nuts for 4 months trying to find what was happening... until we traced the actual colored wires and found "Eureka"!! Had the same symptoms described here.

jimstaz · 01-11-2013, 02:09 PM

im having lot of problems with my car and reading my this post is giving me some trouble shooting ideas...

wish me luck.. but if you look at my post about electric stuff to idle stuff see some of my details and how the problems went from this to that in order.. i need help and knowledge guys. thank you

03-11-2011, 01:22 PM	#1
jking01 The Newbie Join Date: Mar 2011 Location: Hamilton, ON Posts: 2 Rep Power: 0	06 Rx-8 start and idle problem I recently bought a 2006 rx-8, now im having problems with starting it. It starts rough and idles high then dies out. If i give it gas it will stay running, can anyone let me know whats wrong with it. I would like to try and fix it myself before bringing it in. Ive heard it could be the apex seals are worn out aswell. Am i better off rebuilding the engine ? Thanks J.king Last edited by jking01; 03-11-2011 at 01:51 PM.

03-12-2011, 08:41 AM	#3
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN Posts: 4,043 Rep Power: 22	Coils and plugs are you enemy with a Renesis. Get a compression test first and foremost. Do NOT spend money on coils and plugs unless you just want to spend the $$$. Test compression, and test the coolant system. Trust me. Next in line is the fuel pump. Mine died right before I sold my RX-8. __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

03-13-2011, 03:19 PM	#5
Redshft Rotary Fan in Training Join Date: Feb 2010 Location: Halifax, Nova Scotia, Canada Posts: 78 Rep Power: 16	Is the car throwing any codes at all? The RX8 is pretty wired up so a lot of problems will have a code in the computer. (eg. when my coils died, I was getting a Random Misfire code.) __________________ 2004 RX8 GT 1986 RX7 Track Car: 13B Bridge Port w/ Renesis Internals and Weber Carb 2003 MazdaSpeed Protege 1988 RX7 Convertible - new project 2004 Impreza and 2003 Legacy wagons for hauling groceries and The Dog

03-15-2011, 10:32 AM	#6
Sephitrask BOILED PEANUTS!!! Join Date: Jun 2010 Location: Jacksonville, Fl Posts: 257 Rep Power: 15	When you say it starts rough, do you mean it is difficult, or that it shakes? Have you changed anything on the car since you bought it? is it stock? What is the mileage? Any idea on the maintenance history (engine previously replaced, cat, coils, oils and fluids, etc) IF it is a hard start, Before you get a compression test check and see if you have the revised starter, then get the test done. Also check for vacuum leaks, they can cause it to choke like that as well. If all those items check out, there is a good chance its your coils. FYI, Oreilys carries the updated coils for our car for $33, half the dealer price. And they are the same part from the dealer, same stamp on the side, from the same plant, just without the dealer markup. They also carry our spark plugs for $20. __________________ www.rotarycarclub.com *"The way a Rotary engine makes power is ferocious, much like having a chainsaw under your right foot."*

08-11-2012, 04:22 PM	#8
lee The Newbie Join Date: Aug 2012 Posts: 1 Rep Power: 0	rx8 idle troubles hi guys, just bought my rx8 2005 its a South African model, not sure the difference btween the left hand drive..anyways.. it takes a while to start & its idle is irregular, backfires like crazy!! what could it b b4 i take it 4 diagnostics?

03-11-2011, 01:47 PM	#2
jking01 The Newbie Join Date: Mar 2011 Location: Hamilton, ON Posts: 2 Rep Power: 0	could it be a fuel injection problem ?

03-13-2011, 02:52 PM	#4
diabolical1 I have radioactive semen Join Date: Jul 2008 Location: in a bottle of Glenfiddich Posts: 249 Rep Power: 17	was it doing this when you bought it or is this a new development? as said above, check your compression. however, another possibility is your catalyst (because of your coils). when my cat died a few years ago, my car exhibited the same type of behavior.

11-14-2011, 02:20 AM	#7
stinksause The Newbie Join Date: Apr 2010 Posts: 24 Rep Power: 0	yeah ... rx8 parts are expensive .... your engine may be blown ... do what the others said

01-11-2013, 12:38 AM	#10
GaryBuster The Newbie Join Date: Nov 2012 Posts: 2 Rep Power: 0	IF the car has been "worked on", here's a story for you.... MY history is with RIP it in Ok City... they miswired the second stage fuel injectors with the first stage.... we went nuts for 4 months trying to find what was happening... until we traced the actual colored wires and found "Eureka"!! Had the same symptoms described here.

01-11-2013, 02:09 PM	#11
jimstaz Rotary Fan in Training Join Date: Jul 2011 Location: clarksville, tn Posts: 87 Rep Power: 14	im having lot of problems with my car and reading my this post is giving me some trouble shooting ideas... wish me luck.. but if you look at my post about electric stuff to idle stuff see some of my details and how the problems went from this to that in order.. i need help and knowledge guys. thank you

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