Need help please: sluggish power at wot til 6500rpm
#1
1SIK8
Thread Starter
Need help please: sluggish power at wot til 6500rpm
I have a 04 rx8 6spd with 80'XXX miles, I have a BHR midpipe (no cat), BHR ignition coil kit just installed 2 days ago, yellow optima, deleted air pump, custom single side exhaust, stock intake without VFAD.....
Codes showing: ( I am searching right now)
P0300-Random misfire
P0410-Secondary air injection circuit fail
P2259-AIRsolenoid valve control circuit high ON 2 CCM"
P0138-Rear O2 Sensor Voltage High
P0037-o2 Sensor Heater voltage low
My problem started after I let the car sit for week due to me going to houston texas while my home town was sitting at 30° all week. I came back home, got in the 8 and turned her on without any problems after letting her warm up I took her for a drive. But quickly noticed that my lower rpm power is sluggish til about 6500rpms then the power kicked in. I did every step on the "Misfire Topic" with no luck so I took my car to Mazda for a compression just to make sure my engine isn't giving, the results:
No1 (677.69/709.69/693.69)
No2 (687.69/660.69/682.69)
My next step tomorrow is the connections behind Intake manifold and checking for vacuum leaks.
I'm moving to Houston next week so any help before I go would be highly appreciated. .....Thanks!
Codes showing: ( I am searching right now)
P0300-Random misfire
P0410-Secondary air injection circuit fail
P2259-AIRsolenoid valve control circuit high ON 2 CCM"
P0138-Rear O2 Sensor Voltage High
P0037-o2 Sensor Heater voltage low
My problem started after I let the car sit for week due to me going to houston texas while my home town was sitting at 30° all week. I came back home, got in the 8 and turned her on without any problems after letting her warm up I took her for a drive. But quickly noticed that my lower rpm power is sluggish til about 6500rpms then the power kicked in. I did every step on the "Misfire Topic" with no luck so I took my car to Mazda for a compression just to make sure my engine isn't giving, the results:
No1 (677.69/709.69/693.69)
No2 (687.69/660.69/682.69)
My next step tomorrow is the connections behind Intake manifold and checking for vacuum leaks.
I'm moving to Houston next week so any help before I go would be highly appreciated. .....Thanks!
Last edited by gmoney; 02-10-2015 at 08:18 PM. Reason: I accidently pushed done....
#2
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What's the RPM on that test? If those are normalized to 250rpm, your engine is only barely not failing, since failing at 250rpm is about 656-660kpa.
But, it wouldn't produce a 'power kicked in' result.
P0410, P2259, and P0138 don't matter here, all emissions related, won't affect power.
P0300 is probably firing as a result of whatever is causing your problem.
P0037 needs to get fixed. That COULD be the problem, if the ECU is crippling the car because it doesn't know what your actual AFRs are, so it is spewing fuel in to keep it from a chance of being too lean. That's a critical sensor anyway, and you need to get that resolved. That code is usually a sensor failure, but could be a wiring problem.
When you get the sensor replaced or the harness repaired. CLEAR YOUR FUEL TRIMS before you go driving. Then let the car idle warm, and idle for another 5-10 minutes. Then see how it feels.
But, it wouldn't produce a 'power kicked in' result.
P0410, P2259, and P0138 don't matter here, all emissions related, won't affect power.
P0300 is probably firing as a result of whatever is causing your problem.
P0037 needs to get fixed. That COULD be the problem, if the ECU is crippling the car because it doesn't know what your actual AFRs are, so it is spewing fuel in to keep it from a chance of being too lean. That's a critical sensor anyway, and you need to get that resolved. That code is usually a sensor failure, but could be a wiring problem.
When you get the sensor replaced or the harness repaired. CLEAR YOUR FUEL TRIMS before you go driving. Then let the car idle warm, and idle for another 5-10 minutes. Then see how it feels.
#3
1SIK8
Thread Starter
On my paper it says speed of rev: 199
If it's barely passing then I guess having my engine rebuilt will happen this summer......
As for that P0037 I'll get on that asap...Thanks!
If it's barely passing then I guess having my engine rebuilt will happen this summer......
As for that P0037 I'll get on that asap...Thanks!
#4
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199rpm? your engine is doing pretty good then, normalizes up to 7.9s and 8s. A good engine. (see this chart in the new owner's thread: https://www.rx8club.com/new-member-f...4/#post4533734)
However, 199rpm means your starter is nearly dead. Fortunately, a new starter is a lot cheaper than a new engine
However, 199rpm means your starter is nearly dead. Fortunately, a new starter is a lot cheaper than a new engine
#6
1SIK8
Thread Starter
So I went ahead and bought the 02 from mazda and my starter should be here sometime today, which is good cause after I got my ride back from mazda my 8 starting taking forever to turn on......smh
Out with the old in with the new....
Out with the old in with the new....
#7
1SIK8
Thread Starter
I think mazda tried setting me up for failure, I was taking off my starter when I noticed that both bottom plugs where unplug and hanging there.......smh
#8
1SIK8
Thread Starter
Ok so i've been busy trying to get this problem solved before i move. After doing all things i read about i went back and got my codes checked i got:
P0300
P0410
P2259
The things ive done so far (not in the order listed)
BHR Ignition coils and Wires (only 50miles on them)
Spark plugs
Cleaned MAF
Cleaned ESS
I have catless BHR Mid pipe
Compression test
Cleaned Intake Manifold
Checked SSV (moving freely)
Check ground wires
Deleted VFAD (done 2 yrs ago)
Deleted Air Pump (done a yr ago)
Installed new starter
took off the negative post on the battery for 20 min
pushed the breaks 20times
could my fuel pump or injectors have anything to do with the sputtering and hesitation?
P0300
P0410
P2259
The things ive done so far (not in the order listed)
BHR Ignition coils and Wires (only 50miles on them)
Spark plugs
Cleaned MAF
Cleaned ESS
I have catless BHR Mid pipe
Compression test
Cleaned Intake Manifold
Checked SSV (moving freely)
Check ground wires
Deleted VFAD (done 2 yrs ago)
Deleted Air Pump (done a yr ago)
Installed new starter
took off the negative post on the battery for 20 min
pushed the breaks 20times
could my fuel pump or injectors have anything to do with the sputtering and hesitation?
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