Misfiring after 4k rpm!!
"BR7ES gapped at .025" and all your woes will be gone guaranteed"
That may have worked well for you but it didn't work too well for me.
From my personal experience, I have been getting the misfire code ever since the car was new and stock. The only time that it happens is high rev 4500-7000 RPM with open and close throttle. In fact I got one today.
Basically if I rev up to those rpm and keep it there and throttle back and forth a little bit... "Sevice Engine Soon" light comes on with momentary loss of power. I can induce this EVERYTIME!! (I've had the code read 3X and it's always the same code and induced the same way.)
I did changed my plugs to BR7ES and gapped it to both .24 and .25 with same result. I have 12K miles on it and change the plugs out every 3-4K miles.
Mitsubishi have applied the technical bulletin and reprogrammed my ECU to help rectify the problem but it didn't help me at all. (You get a sticker on the ECU after the programming.) This is free. You should get this done because it might work better on your car.
I do not get this misfire if I'm WOT and accelerating, even if I were to go to redline. This ONLY happens when I maintain high RPM in any gear. Strange!!
I will drive with the CEL on until I get home then I reset it. I reset it by taking out the 20Amp fuse in the engine and keep it out for about 10 seconds. It resets the light and I'm good to go until it happens again. The fuse tool is behind the tray in front of your left leg if you need to use it. (I use it).
I have accepted this anomaly and rarely induce the CEL but I did it today though. I reset it and I'm good to go until the next time... whenever that is.
Sorry this might not help much but it just shows that you're not alone with the random multiple misfire code.
BTW: I've had the car for 2 years now and it's an 03.
That may have worked well for you but it didn't work too well for me.
From my personal experience, I have been getting the misfire code ever since the car was new and stock. The only time that it happens is high rev 4500-7000 RPM with open and close throttle. In fact I got one today.
Basically if I rev up to those rpm and keep it there and throttle back and forth a little bit... "Sevice Engine Soon" light comes on with momentary loss of power. I can induce this EVERYTIME!! (I've had the code read 3X and it's always the same code and induced the same way.)
I did changed my plugs to BR7ES and gapped it to both .24 and .25 with same result. I have 12K miles on it and change the plugs out every 3-4K miles.
Mitsubishi have applied the technical bulletin and reprogrammed my ECU to help rectify the problem but it didn't help me at all. (You get a sticker on the ECU after the programming.) This is free. You should get this done because it might work better on your car.
I do not get this misfire if I'm WOT and accelerating, even if I were to go to redline. This ONLY happens when I maintain high RPM in any gear. Strange!!
I will drive with the CEL on until I get home then I reset it. I reset it by taking out the 20Amp fuse in the engine and keep it out for about 10 seconds. It resets the light and I'm good to go until it happens again. The fuse tool is behind the tray in front of your left leg if you need to use it. (I use it).
I have accepted this anomaly and rarely induce the CEL but I did it today though. I reset it and I'm good to go until the next time... whenever that is.
Sorry this might not help much but it just shows that you're not alone with the random multiple misfire code.
BTW: I've had the car for 2 years now and it's an 03.
Last edited by bukhumnoi2000; Jul 28, 2005 at 10:43 PM.
Originally Posted by plokivos
yeh, i make a statement, you delete my post.
why don't we hear what the guy who started this post has to say.
by the way, mind as well, just banned me from evo m, delete all my posts while you're at it.
since it's not helping anyone.
why don't we hear what the guy who started this post has to say.
by the way, mind as well, just banned me from evo m, delete all my posts while you're at it.
since it's not helping anyone.
Originally Posted by SlowCar
better thermal/electrical conductivity than iridium, but lower melting point, lower erosion resistance.
and a much much lower price.
what would you rather have? better spark, or longer life? i'd much rather have better spark.
stock ignition system on copper/iridium plugs will have the same spark, you only get a better/bigger spark if the ignition system can put out more juice.
Copper plugs =~$2, iridiums(non-stock) =~$7, iridiums definitely will out last copper 3X
Also the fine point on Ir plugs makes it easier for the spark to arc across to the ground electrode
Copper plugs =~$2, iridiums(non-stock) =~$7, iridiums definitely will out last copper 3X
Also the fine point on Ir plugs makes it easier for the spark to arc across to the ground electrode
Evolving Member
Joined: Jun 2004
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From: Deadly Viper Assasination Squad
Originally Posted by bukhumnoi2000
"BR7ES gapped at .025" and all your woes will be gone guaranteed"
That may have worked well for you but it didn't work too well for me.
From my personal experience, I have been getting the misfire code ever since the car was new and stock. The only time that it happens is high rev 4500-7000 RPM with open and close throttle. In fact I got one today.
Basically if I rev up to those rpm and keep it there and throttle back and forth a little bit... "Sevice Engine Soon" light comes on with momentary loss of power. I can induce this EVERYTIME!! (I've had the code read 3X and it's always the same code and induced the same way.)
I did changed my plugs to BR7ES and gapped it to both .24 and .25 with same result. I have 12K miles on it and change the plugs out every 3-4K miles.
Mitsubishi have applied the technical bulletin and reprogrammed my ECU to help rectify the problem but it didn't help me at all. (You get a sticker on the ECU after the programming.) This is free. You should get this done because it might work better on your car.
I do not get this misfire if I'm WOT and accelerating, even if I were to go to redline. This ONLY happens when I maintain high RPM in any gear. Strange!!
I will drive with the CEL on until I get home then I reset it. I reset it by taking out the 20Amp fuse in the engine and keep it out for about 10 seconds. It resets the light and I'm good to go until it happens again. The fuse tool is behind the tray in front of your left leg if you need to use it. (I use it).
I have accepted this anomaly and rarely induce the CEL but I did it today though. I reset it and I'm good to go until the next time... whenever that is.
Sorry this might not help much but it just shows that you're not alone with the random multiple misfire code.
BTW: I've had the car for 2 years now and it's an 03.
That may have worked well for you but it didn't work too well for me.
From my personal experience, I have been getting the misfire code ever since the car was new and stock. The only time that it happens is high rev 4500-7000 RPM with open and close throttle. In fact I got one today.
Basically if I rev up to those rpm and keep it there and throttle back and forth a little bit... "Sevice Engine Soon" light comes on with momentary loss of power. I can induce this EVERYTIME!! (I've had the code read 3X and it's always the same code and induced the same way.)
I did changed my plugs to BR7ES and gapped it to both .24 and .25 with same result. I have 12K miles on it and change the plugs out every 3-4K miles.
Mitsubishi have applied the technical bulletin and reprogrammed my ECU to help rectify the problem but it didn't help me at all. (You get a sticker on the ECU after the programming.) This is free. You should get this done because it might work better on your car.
I do not get this misfire if I'm WOT and accelerating, even if I were to go to redline. This ONLY happens when I maintain high RPM in any gear. Strange!!
I will drive with the CEL on until I get home then I reset it. I reset it by taking out the 20Amp fuse in the engine and keep it out for about 10 seconds. It resets the light and I'm good to go until it happens again. The fuse tool is behind the tray in front of your left leg if you need to use it. (I use it).
I have accepted this anomaly and rarely induce the CEL but I did it today though. I reset it and I'm good to go until the next time... whenever that is.
Sorry this might not help much but it just shows that you're not alone with the random multiple misfire code.
BTW: I've had the car for 2 years now and it's an 03.
When i gapped my plugs to .025, my misfiring went away at high RPM's, but i get a CEL saying i get misfires at low RPM's. When i gapped to .029, i low RPM misfires went away, but i got misfires at high RPM's. So, guess u gotta get it somewhere in between :P
Originally Posted by 04AWDTURBOEVO
Your plugs have gone bad. You can buy the stock ones again for 19.00 each and change them yourself in 15 minutes. Or you can buy the NGK's BPR7ES's or BPR8ES's (colder plug) from a local autopart at a cost of 1.69 ea. and replace them when ever they go bad again for less. The stock plugs are Iridium/Platinum mix. You can go with the Denso brand too. They run around 13.00 each.
Changing the bad plugs will get read of the missfire.
Check the gap. The gap should be between .24 and .27 per manual. You gap them to your application, but stay between those meassurements.
Changing the bad plugs will get read of the missfire.
Check the gap. The gap should be between .24 and .27 per manual. You gap them to your application, but stay between those meassurements.
just tried the bosch platinum +4
JUST to see what would happen...
sure enough...i get the machine gun fire effect
coming out the exhaust...
so what's the deal w/ the platinums...jeez
i'm switching them back to my copper NGKs
JUST to see what would happen...
sure enough...i get the machine gun fire effect
coming out the exhaust...
so what's the deal w/ the platinums...jeez
i'm switching them back to my copper NGKs
do you guys get this effect while accelerating or lettin off the gas, i get sorta a machine gun effect when letting off and i changed my plugs to the copper 7ES
and gapped them at 24-26. i still get the effect why?
and gapped them at 24-26. i still get the effect why?
i never got that w/ coppers...only with these platinums and full throttle.
at lower rpms and cruising it was fine...but as soon as i opened the throttle
and rpms above 4k...it would make that sound...i wouldn't mind the sound
if it didn't affect the performance of the car.
maybe it's the hotspots...maybe it's something else...
i'd like to know tho...
getting mine sent back to bosch
at lower rpms and cruising it was fine...but as soon as i opened the throttle
and rpms above 4k...it would make that sound...i wouldn't mind the sound
if it didn't affect the performance of the car.
maybe it's the hotspots...maybe it's something else...
i'd like to know tho...
getting mine sent back to bosch
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