Are my coil packs done? Hesitation, power loss
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Are my coil packs done? Hesitation, power loss
Car: 2004 RX-8 6MT, 35400 miles. Cold weather climate.
Symptom: Smooth idle, zero CEL light, zero stalling. Engine is ~40% down in power, dealer pulled misfire codes from the ECU.
There is a lot of hesitation when the engine is under load, the rev climbs slowly, especially in the 3-4k rpm range. Between 4000-7000 rpm it does seem to pull okay, but obviously not as smooth or strong as before.
Engine sounds rough, makes a groaning noise instead of the smooth turbine sound. Shifter is vibrating a lot more than normal.
Replaced all four spark plugs, didn't make a difference. The leading plugs had 25k miles on them. They do look a little grungy, but nothing out of ordinary for a rotary.
Dealer claim to have pulled cat to inspect the internal, and also did a compression test. Said both are okay.
I have 4 coil packs on order, will be replacing them next week. Dealer refused to do anything further until I get a CEL on the dash. Meanwhile my car is slower than a Rabbit diesel.
Other possibilities I've considered: bad plug wires, clogged MAF sensor (I don't have oil residual in my accordian), stuck VVT valve.
So what do you guys think? mysql101, MazdaManiac, anybody..?
Symptom: Smooth idle, zero CEL light, zero stalling. Engine is ~40% down in power, dealer pulled misfire codes from the ECU.
There is a lot of hesitation when the engine is under load, the rev climbs slowly, especially in the 3-4k rpm range. Between 4000-7000 rpm it does seem to pull okay, but obviously not as smooth or strong as before.
Engine sounds rough, makes a groaning noise instead of the smooth turbine sound. Shifter is vibrating a lot more than normal.
Replaced all four spark plugs, didn't make a difference. The leading plugs had 25k miles on them. They do look a little grungy, but nothing out of ordinary for a rotary.
Dealer claim to have pulled cat to inspect the internal, and also did a compression test. Said both are okay.
I have 4 coil packs on order, will be replacing them next week. Dealer refused to do anything further until I get a CEL on the dash. Meanwhile my car is slower than a Rabbit diesel.
Other possibilities I've considered: bad plug wires, clogged MAF sensor (I don't have oil residual in my accordian), stuck VVT valve.
So what do you guys think? mysql101, MazdaManiac, anybody..?
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Sounds like what mine is doing exactly, took it in and they said bad plugs and Coils, will be replacing them all Friday. I am at 50.7K miles. Safe to say yours is the same issue. Mine is an 04 as well.
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here's how to check the coils:
http://www.finishlineperformance.com...16-07-1793.pdf
http://www.finishlineperformance.com...16-07-1793.pdf
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here's how to check the coils:
http://www.finishlineperformance.com...16-07-1793.pdf
http://www.finishlineperformance.com...16-07-1793.pdf
I've thought of swapping the coil packs for L and T as a test, but I figure if it's T that's failing, swapping it to L will make things a whole lot worse. Might as well wait for the new coil packs to get here.
I've parked the car in the mean time, don't want to screw up the cat or foul up my brand new, $300 spark plugs. (is there a middle finger icon in the forum software?)
Last edited by climacus; 11-14-2007 at 03:42 PM.
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the coil packs are all the same, there is no L or T on them. (only the spark plugs are Leading / Trailing sensitive)
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Car: 2004 RX-8 6MT, 35400 miles. Cold weather climate.
Symptom: Smooth idle, zero CEL light, zero stalling. Engine is ~40% down in power, dealer pulled misfire codes from the ECU.
There is a lot of hesitation when the engine is under load, the rev climbs slowly, especially in the 3-4k rpm range. Between 4000-7000 rpm it does seem to pull okay, but obviously not as smooth or strong as before.
Engine sounds rough, makes a groaning noise instead of the smooth turbine sound. Shifter is vibrating a lot more than normal.
Replaced all four spark plugs, didn't make a difference. The leading plugs had 25k miles on them. They do look a little grungy, but nothing out of ordinary for a rotary.
Dealer claim to have pulled cat to inspect the internal, and also did a compression test. Said both are okay.
I have 4 coil packs on order, will be replacing them next week. Dealer refused to do anything further until I get a CEL on the dash. Meanwhile my car is slower than a Rabbit diesel.
Other possibilities I've considered: bad plug wires, clogged MAF sensor (I don't have oil residual in my accordian), stuck VVT valve.
So what do you guys think? mysql101, MazdaManiac, anybody..?
Symptom: Smooth idle, zero CEL light, zero stalling. Engine is ~40% down in power, dealer pulled misfire codes from the ECU.
There is a lot of hesitation when the engine is under load, the rev climbs slowly, especially in the 3-4k rpm range. Between 4000-7000 rpm it does seem to pull okay, but obviously not as smooth or strong as before.
Engine sounds rough, makes a groaning noise instead of the smooth turbine sound. Shifter is vibrating a lot more than normal.
Replaced all four spark plugs, didn't make a difference. The leading plugs had 25k miles on them. They do look a little grungy, but nothing out of ordinary for a rotary.
Dealer claim to have pulled cat to inspect the internal, and also did a compression test. Said both are okay.
I have 4 coil packs on order, will be replacing them next week. Dealer refused to do anything further until I get a CEL on the dash. Meanwhile my car is slower than a Rabbit diesel.
Other possibilities I've considered: bad plug wires, clogged MAF sensor (I don't have oil residual in my accordian), stuck VVT valve.
So what do you guys think? mysql101, MazdaManiac, anybody..?
Have your dealer/mechanic check your engine mounts. I have some of your symptoms (shaky start ups, shaky gear shifter) and I am going to replace the engine mounts. These symptoms are more obvious between 2-4k RPMS, 5-9k my car runs like before.
#12
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wat do you mean it will take out the cat? how so?
on full throttle, climbing up the rpms, mine stops limbing at 5000 rpms and sometimes will go beyond that...also it has a shaky rough idle.......replace the coils???
on full throttle, climbing up the rpms, mine stops limbing at 5000 rpms and sometimes will go beyond that...also it has a shaky rough idle.......replace the coils???
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#14
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yea because i took off my cat pipe section and i dumped out alot of the honeycomb ceramic stuff...and my 8 is laggy, has not get up and go anymore, and it bogs down after usually 5k rpms...sound like the coils need replacing???
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