2010 R3 powerloss 4500-8000 IDEAS?
Hi All,
my 65000km 2010 R3 has just suddenly developed a considerable power loss from 4500 up, no codes car has no Cat, near full tank of fuel have BHR coils, and plugs done about 3000ks ago Idea for cause are SSV solenoid? Fuel pump ? coils? is there a best way to differentially diagnose between these possibilities? |
Sounds like your car may be in "limp mode"...perhaps d/t an OMP issue. M/b worthwhile to search it on the forum. Good luck.
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If it was in limp mode it wouldn't go over 4k or 5k rpm.
The SSV and VDI solenoids can be tested. Remove them, put a MityVac hand pump on the port that connects to the vacuum accumulator (opposite side of the solenoid from the connector). Pull 10 psi vacuum and see if it holds. If it does, apply 12v across the pins and see if the vacuum is vented to atmo. |
Check your MAF sensor?
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Originally Posted by t-run/8
(Post 4893281)
Check your MAF sensor?
will do, seem likel the easiest thing to do |
Originally Posted by NotAPreppie
(Post 4893262)
If it was in limp mode it wouldn't go over 4k or 5k rpm....
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Engine Power Loss
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Still not had time to look at it,
but today it thew a pending P0302 code, on cold start, started v badly, but was fine once warmed |
another bad start yesterday,
still same pending code, ill change the leading rear coil on weekend, hope that sorts it |
Thought a little more about this.
I wonder if maybe a plug wire slipped loose or one plug was not seated correctly and that could be causing your code? I would check your ignition system first since that was the last thing you changed in the car. |
Originally Posted by t-run/8
(Post 4894025)
Thought a little more about this.
I wonder if maybe a plug wire slipped loose or one plug was not seated correctly and that could be causing your code? I would check your ignition system first since that was the last thing you changed in the car. |
for that ignition system the first thing you should do is check all the coils and wires per the S1 DIY thread. I recommend checking at the wire spark plug connection first; good spark test then both wire and coil good; weak or no spark then one or other is bad. Also make sure the main ground wire is secure and proper. Also check to make sure the coil harness wiring is not rubbing against the front engine lift hook; common problem.
https://www.rx8club.com/series-i-do-...-wires-222641/ More likely to be a leading rather than trailing issue for that significant of a loss. Also reset ESS profile, clean and test ESS sensor if problem persists. also, get a vacuum gun and pull a vacuum on the solenoid tank and see of it holds. No need to pull solenoids if it does, only if it leaks down. Most likely an SSV issue if starting from 4500 rpm (should open after 4100 rpm under WOT, otherwise no secondary ports). Make sure the actuator arm opens and closes smoothly. Any unusual exhaust smoke/smell on start-up? Running rough until warm could indicate a leaking coolant seal. Might cause a misfire code too. . |
Originally Posted by sinkas
(Post 4894438)
I think its the rear leading coil, will change soon as time permits
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No other signs of ,
just occasionally terrible rough starting after damp cold night, and is fine after about 1 minute, still gutless through mid rage, so, maybe combination of issues got some new coil on the way, and don't know how long till I have time to do much more on it cant rule out coolant use yet, but am monitoring it, don't know why mazda made the coolant tank so hard to read,.... |
In the end this was a combination of issues
1) stuck (shut) SSV that didn't throw a code, 2) weak Leading coil on rear rotor 3) plug wires were routed so that the longer leading ones were on the trailing, so they were very tight, I replaced coils, had ssv " unstuck" and also replaced solenoids at same time, so far so good. |
Congratulations, but you need to be concerned about why the SSV is stuck. That’s generally going to indicate a possible problem elsewhere that’s resulting in those deposits.
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Originally Posted by TeamRX8
(Post 4898803)
Congratulations, but you need to be concerned about why the SSV is stuck. That’s generally going to indicate a possible problem elsewhere that’s resulting in those deposits.
I wonder if a failing coil for 5000K's might have been a contributor, and I had been a bit lax on really thrashing it out daily it now feels like it had more power than it ever had, so maybe it was partially stuck the whole time Im just surprised it didnt throw a SSV code |
Because Mazda only designed it to throw a code if it’s stuck open, that’s why.
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Originally Posted by TeamRX8
(Post 4898848)
Because Mazda only designed it to throw a code if it’s stuck open, that’s why.
I thought the code was for stuck shut, do you think the dying coil could have been part of the problem?, |
Well bugger me,
the misfire is back a few days without it,and this morning, rough start and same P302COde same code, rear rotor, anyone think it might be the coil adapter harness as well? SSV def working still, so, ? harness? PLugs? Pug wires? Leaky injector? |
well you have to check those coils again
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Sorry to grave dig, but what was the final outcome, OP? I've had a very similar problem!
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