am22

Well I’ve been having detonation problems since last month its really noticeable around 3000rpm when I posh on the throttle. I changed the coils the sparks and it didn’t help. Also it doesn’t do it until its wormed up. And the more I drive it the worst it gets. I’ve noticed that the engine has a bad shake to it when it’s wormed up too. I’m guessing it has something to do with my fuel pump. Any thoughts or ideas about this or what could be causing this.

Thanks everyone

dannobre

iTrader: (3)

Check the fuel pressure...that's the only way you will answer that question

olddragger

iTrader: (3)

and the pressure may look good but volume may not be enough. Dan you have seen the 09 pump right?! It maybe our answer--i may have one by 1/31.
OD

dannobre

iTrader: (3)

You mean they finally fixed it after 5 years

alnielsen

iTrader: (4)

Is it a plug n' play replacement?

olddragger

iTrader: (3)

maybe--at least the fuel filter is replaceable now and the sock is redesigned+ other stuff. Its been 5 yrs?!! Dang!
OD

olddragger

iTrader: (3)

SHould be interchangeable--fuel pressures did not change, gas tank has no redesigns.
Creditable source suggest that the pump is a denso pump!
OD

Old Rotor

Are you running prem-fuel? Give us some more history and info on your car. Have you tried to de-carbon it yet or Sea Foam(or some other engine cleaner) in the tank?

04RX8man

yeah what fuel are u running? 93,91,89,87? Detonation is when the Air/Fuel mixture lights before the spark plugs becuse A: motor is hot and not high enough octane(that y is has to b warm to happen)

am22

Oh ya I forgot to tell you guy’s info about my car. lol sorry
It’s a 2004 32000 miles and I use 93 gas, and I cleaned the engine with Zoom Power Engine Cleaner last week.

Brettus

iTrader: (2)

check your spark plug leads are on propery .
Are you sure it is detonation ? 3000 rpm is unusual for that .

am22

Well it sounds like detonation but it’s odd on the old rx7 the engine light would come on when detonation occurred and the knock (Detonation) Sensor detected it and could not solve the problem by recalculating the adjustments, but the CEL isn’t on in the rx8.