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2004 rx8 stalls at stop signs. After 5 mins of driving.
Ok I just bought this rx8 really cheap. It has hot start/ stalling problem. I can’t even drive around town without having to wait another 45 mins to cool the engine down.
here’s the mods.
rx8 2 stroke converted. Seller Description said this is the grand touring 13b 6 port that has been overhauled with atkins kit. Decatted.
Ac compressor removed. new coils and plugs.
Battery moved to trunk( don’t know why) but I do like the engine bay clearance without that giant battery in the way.
I cleaned plugs, and maf. I’ve heard things about the throttle body or the tps sensor causing stalling issues but I really don’t think so. Also heard of those solenoids that are under neath the intake( intake needs removed) that could go out and cause stalling. They also say o2 sensor( precat) could be the culprit.
my deeply educated guess is that it needs a TUNE!
well my fellow rx8 owners and mechanics please educate me one fixing this sexy but flawed out car…
Thanks for the quick reply and the bad news lol. Im pretty sure it’s probably compression🤦🏻♂️
im ordering a tester now.
But, if that is the case. Is there anything I can do to give it more compression for now? Like maybe a really heavier oil.
btw I just almost forgot. It does have a pretty decent oil leak and upon touching the oil that is leaked out , it’s a very light weight oil. And the leak most likely has a lot to do with the compression being low.
please let me know what your thoughts are. Thanks a million.
Sounds like classic compression. Is the leaking oil the 2 stroke?
Did the previous owner just replace the seals? Because that's not really a rebuild if the big parts were worn out. And if he did it himself there's a decent chance mistakes were made. But hey if it was cheap and you're ready to spend for a fresh engine, you could have many miles of smiles ahead of you.
true story.. I’m new to t he rotary engine but very mechanically inclined and that lil thing is awesome. I have a 6 speed and off the line this lil bad mfer goes. And yes I’m really thinkin I need a new (used motor) lol oh well
Originally Posted by Loki
Sounds like classic compression. Is the leaking oil the 2 stroke?
Did the previous owner just replace the seals? Because that's not really a rebuild if the big parts were worn out. And if he did it himself there's a decent chance mistakes were made. But hey if it was cheap and you're ready to spend for a fresh engine, you could have many miles of smiles ahead of you.
Anybody have any input on using an oil additive/ stop leak and heavy oil like 20w 50?
loki… looks and smells like conventional oil. I may have not mentioned that it has the 2 stroke adapter conversion tank too. So yeah 2 stroke oil has a sweeter smell like diesel oil.
smells like a chainsaw with the windows down
Get a new/rebuilt engine from a rebuilder or from Mazda. Buying used rotaries is not the best lottery to play. It'll be more expensive but it'll work.
If you want to mask compression loss for a bit you could run more premix (of 2 stroke oil) but that won't get you far, if at all. Compression is lost when metal parts no longer touch, no amount of oil is going to repair that.
What 2-stroke are you putting in there? It's not any ole 2-stroke oil, you need JASO FD rated. Marine and chainsaw oil isn't really the right choice there. It shouldn't really smell unless you're dumping a lot of oil in there. The amount of oil the OMP injects is miniscule.
You may want to read up at rx8help.com. There are articles for new owners about stuff to know. Whatever killed the original engine might still be on the car, so make sure you're verifying the cat, ignition system, cooling, etc.
Alright broskis. I wanted to add another issue.. it just started. My 6 speed ain’t goin into any gear. And to get home from the gym I had to yank it with a lot of muscle into reverse and after I got it in gear it was shifting normally again.
also, wanted to add that my power steering is out but comes back on randomly and shutters the steering wheel like I’m in a dog on earthquake. I want to disable power steering completely because it seems like it is screwing with my idle and transmission. It makes an awful rattle noise when the power steering is trying work. 😭🤦🏻♂️
Sounds like a botched rebuild, someone cheaped out and tried to use the Atkins seals. My father did the same thing way back when I was in highschool. After college I did several rebuilds on my own changing one part at a time and as far as I determined the Atkins seals barely held compression. Could be that they take longer to bed in, but I personally wouldn't ever suggest them considering how unhelpful they were when we had questions. On a renesis rx8 engine there's no reason to use anything else other than mazda oem seals, unless you are turboing and going to the taller rx7 seals.
Reverse gear normally has issues, 7 transmissions I have used all have trouble going fully into reverse. I find I can let off the clutch slightly to turn help align things. I suppose changing fluids wouldn't hurt.
The power steering wouldn't have an effect on the transmission or idle unless you have some serious electrical issues across the entire car. Otherwise I would start by cleaning out all of the connectors on the rack and the connectors on the harness sitting on the radiator. It is fairly common that these connectors get junk in them from the coolant overflow drain tube.
Sounds like a botched rebuild, someone cheaped out and tried to use the Atkins seals. My father did the same thing way back when I was in highschool. After college I did several rebuilds on my own changing one part at a time and as far as I determined the Atkins seals barely held compression. Could be that they take longer to bed in, but I personally wouldn't ever suggest them considering how unhelpful they were when we had questions. On a renesis rx8 engine there's no reason to use anything else other than mazda oem seals, unless you are turboing and going to the taller rx7 seals.
Reverse gear normally has issues, 7 transmissions I have used all have trouble going fully into reverse. I find I can let off the clutch slightly to turn help align things. I suppose changing fluids wouldn't hurt.
The power steering wouldn't have an effect on the transmission or idle unless you have some serious electrical issues across the entire car. Otherwise I would start by cleaning out all of the connectors on the rack and the connectors on the harness sitting on the radiator. It is fairly common that these connectors get junk in them from the coolant overflow drain tube.[/QUOTE]
You can pull the EPS fuse but that might throw off DSC and other features. None of this sounds unsolvable, but you may need to invest a bit to get the car back into enjoyable shape. You're mostly fixing the previous owner's mistakes.
As stated above, power steering could be as simple as dirty connectors, plenty of threads on that.
this sound dumb but I actually like it without power steering and it’s perfect for dragging if I decide to boost.
Originally Posted by Loki
You can pull the EPS fuse but that might throw off DSC and other features. None of this sounds unsolvable, but you may need to invest a bit to get the car back into enjoyable shape. You're mostly fixing the previous owner's mistakes.
As stated above, power steering could be as simple as dirty connectors, plenty of threads on that.
10-24-2022, 04:54 PM
