okay i have a problem with my 2004 RX8. It wont start when hot. Have changed the spark plugs and that made no difference. Changed the coils and thats not helped either. the car runs perfect other than the starting problem. starts every time when cold. tried erything when hot but wont start. help please

 

If your under 100,000 you can go to the dealer and say you have an issue with hot starting. More than likely you'll need a new engine.
The engine has a 100,000 mile warranty on it.

Tell us a little bit about the cars history. Mileage/modifications/automatic/manual.

 

the engine only has about 30000 miles on it. its a 2004 car tho. it back to mazda and they said it needed new coils and a new cat. did the coils and made no difference. another garage said there is no problem with the cat!! confused mazds asked £3500 +vat for a coil and cat change

 

Hot starting rotary engines are relative to low compression. Still sounds like you need a new engine.
You could try a Seafoam. Or the Mazda internal engine cleaning product. (ZoomZoom Cleaner)

A catalytic Converter really has no affect on hot starting. It will affect higher RPM power loss. If your not suffering from a power loss then I would think the cat is OK.

Majority of hot start issues are signs of a bad engine. Low Compression.
I would suggest a compression test. That will tell you what condition the engine is in.

 

Listen to Easy_E1, since your car is out of warranty i'd get a compression test done and start from there.


Instead of wasting 3500£ from the dealership i think that you should also see what the prices are for the coils around here even if it doesn't look like a coil problem.

 

Mine seems to be unhappy about starting when hot, but starts. It's idling a little rough lately, too. A recent oil change didn't help. I'm wondering if it's because of the crazy heat wave(s) we've been having here, but maybe I need spark plugs. I just turned 52,000 miles. I'm sure my dealership will be happy to sell them to me. lol

 

Yes,UK cars don't have an 8 Year 100K Warranty..

This is posted in wrong forum..

 

Hi everyone

I have a 2003 231bhp

Starts and runs fantastic ! i get the hot start issue sometimes on my first drive of the day !.

Say like i get up and drive to my mums, 45 miles if i stop to get petrol once i pay and come out again the car turns over but no fire !! i found if she dont fire in the first 3-4 sec i flick the ignition on and off 3-4 times the car fires first time !!!

The car has done this since ive had it i im still running the smaller starter and have never flooded it flooding is operator error !!

 

Why do you think an oil change will help with hot starts or running rough ? Change plugs , coils and wires, maybe even seafoam it,then report back, in the correct section. There are enough post's in here with your symptoms, just search.