Originally Posted by Dragosani (Post 3386573)

Hi, I bought a second hand rx-8 2004 model a few month ago. I do love the car but I have found that my car is having a small problem starting once the engine is warm. If for any reason I stop the car once the engine is up to temp it wont start again. I try the foot to floor to clear out any gas from engine this makes no difference. It starts again after 30 sec to a min of turning over (5-10 sec at a time) and even when starting it is very reluctant. Any ideas of what it could be?

Originally Posted by halimsteven (Post 3388226)

i think you should go to the dealer to do some compression check, because if you have that problem while your engine is warm, you shuold get that a big question regarding the engine...
steven

Originally Posted by tubingchamp (Post 3388236)

Uh, not really.

Check your plugs+coils, had this happen to a local club member on a cruise a couple years back. New plugs+coils, it's like new again.

Originally Posted by gummis84 (Post 3391402)

Hi i live in iceland and i have the same troblem with my rx9 04 when it's hot. I whent to the mazda dealer and got new spark plugs and coils but it's the same it won't start when hot and they cant find anythig wrong so um just giving up on my mazda:o(

Originally Posted by Dragosani (Post 3386573)

Hi, I bought a second hand rx-8 2004 model a few month ago. I do love the car but I have found that my car is having a small problem starting once the engine is warm. If for any reason I stop the car once the engine is up to temp it wont start again. I try the foot to floor to clear out any gas from engine this makes no difference. It starts again after 30 sec to a min of turning over (5-10 sec at a time) and even when starting it is very reluctant. Any ideas of what it could be?

Originally Posted by jimmyg30 (Post 3605541)

Hi, just had this problem sorted after 6 months, £1500 and 5 visits to local mazda dealership. Hopefully this helps as I had a nightmate:


I had the following done:
compression test
replaced spark plugs
and HT leads
full diagnostic

after all of this, still had warm start problem. Dealership sent diagnostic to Mazda UK (oem). They analysed and sent back that it was a faulty starter motor. Had to get it replaced, another £450....finally sorted. Starts first time....every time. There was a fault on all starter motors from 2004+ models.

Hope this helps!!!
Jim

Originally Posted by tedo (Post 3758360)

Sorry if I steer off-topic a little bit, but if you get a compression test done at the dealer, are they supposed to show you the readings/results?

Originally Posted by gummis84 (Post 3759060)

I did talk to the dealer about compression test and they told me sorry no can do we cant do it coz we dont have tools for it. There are only 11 rx8 in iceland still on the road. i have to take my car do the uk or denmark or sweden to get the compression test done.

Originally Posted by jimmyg30 (Post 3605541)

Hi, just had this problem sorted after 6 months, £1500 and 5 visits to local mazda dealership. Hopefully this helps as I had a nightmate:


I had the following done:
compression test
replaced spark plugs
and HT leads
full diagnostic

after all of this, still had warm start problem. Dealership sent diagnostic to Mazda UK (oem). They analysed and sent back that it was a faulty starter motor. Had to get it replaced, another £450....finally sorted. Starts first time....every time. There was a fault on all starter motors from 2004+ models.

Hope this helps!!!
Jim

Originally Posted by TQCuong3th (Post 3952646)

hey did u ever find out the problem???

Originally Posted by bse50 (Post 3388320)

Please give us your car's history (miles, maintenance, whatever).
It is a common problem in general with rotaries, especially in Europe where short trips are more frequent.
It may be related to several different things, here are the most common:
Catalyzer. When broken or clogged it may restrict flow. You would also a general loss in performance by that time but this doesn't seem to be your case.
Ignition system: it wears out pretty quick, a lot of misinformed rotary owners also don't change the spark plugs frequently. Misfires are a symptom, yours is another in some cases.
Bad engine compression: the mother of all hot starting issues! Get a compression check done, please.
Fuel pump: it may cause power losses and make the car difficult to turn on when hot.

Hope this helps.

Originally Posted by Dan=RX8 (Post 4156098)

Hi all,

I have a 2004 04 plate RX8 with really bad starting WHEN HOT issues and have been advised that it is a compression problem but really dont want to fork out for a new motor :( it has 82000 miles on it, serviced regular, i have replaced the coils, plugs, maf sensor and the air pump as it was making a really loud noise on cold start ups, could the air pump been broken for some time eventually worn my cat out?? and would a knackered cat affect hot starting?? i have not yet done a compression test as dont have a tester for rotarys and dont really want to pay dealer prices :( any help/info would be great.

Thanks in advance guys.

Originally Posted by Brettus (Post 4156200)

get a high speed starter motor , make sure your battery and ignition are 100% .
Unless your compression is really bad - that list will give you the best chance of keeping it running for many more miles .

Originally Posted by Dan=RX8 (Post 4156203)

I have the upgraded starter fitted and got a larger higher power battery just last year, coild and plugs all replace within last few months so only thing left is a compression test at the dealers i think :(