silent8

hey i was wondering my enigine light came on and my scanner said it's cylinder 1 misfire detected, and i was wondering if i change my spark plug wire if that'd be good cuz i just changed my spark plugs a month ago so i think they'er still good. wellz if someone can help me much thx

swoope

iTrader: (5)

check to make sure they are seated first. the front lower wire tends to come loose..

after that, i would start thinking about new coils..

beers

Razz1

AHH... A MISFIRE CAN HAPPEN ANYTIME.

If it's consistant.. we have a problem Houston.

rotaryman25

Check your coils with a timing light to verify they are working, You can have a trailing coil fail and you will not notice you car running much different.

TeamRX8

iTrader: (25)

first thing to try when a misfire code happens is resetting the eccentric shaft profile, turn the ignition to the ON position (don't engage the starter) and then pump the brake pedal as fast as you can until you see the instrument gauge needle swing on the dash, this resets the profile

also pull the room fuse from the driver's side kick panel box for several minutes (lowest fuse inline, blue 15 Amp), this resets the fuel trims in the ECU for quicker relearning, the ignition key should be off/removed for this one

silent8

ok i went to the dealer today cuz nothing else was working and they said that my spark plug wasn't in straight and to tap it out and putting in a new plug is gonna cost me $478...should go to the dealer or should i try somewhere cheaper???

davidwanj

$478 for touching your spark plugs??? assuming spark plugs is $20 (which in most place, that's how much it would cost)...the rest of 458 dollars go to labor by removing a wheel so they can unscrew the plugs...talk about some high labor cost

and beside...if the spark plugs wasn't in straight....wasn't that suppose to be cover under warrenty? they installed incorrectly, that's not your fault

road1will

Well, the OP did say that HE just changed his spark plugs about a month ago, so it sounds like he did do it, and it sounds like he cross threaded it when threading it into the rotor housing. Im guessing Mazda is charging him the $478 to remove the plug and retap the hole since the threads will be buggered up.

silent8

wellz i didn't change it my self i had someone else do it cuz i didn't really know how to do it on the 8 yet but now i know and now i'm wishing i did it myself

silent8

does anyone know wat size the threading is???

TrochoidMagic

that really sucks silent.
part of being an enthusiast is to enjoy learning about your own car and tending to its needs. the help or advice taken if you allow should only be from other experienced mechanically inclined enthusiasts. (thats my opinion, if newb)

i only hope you grow from this experience and wait to see what we(as a forum community) can offer to you of assistance in the future. and pls., don't be afraid to get ur elbows dirty... its always best(in terms of satisfaction) to get it done yourself and having the confidence that you will do it right.

best wishes

TrochoidMagic

can't tell you thread size off the bat. but get more spare plugs as you don't wanna re-use those anymore anyways. then also ask for the tool of proper thread pitch the same time you get new plugs... simple =)

silent8

thx everyone for the help...and i did get it fixed and did put new plugs...wasn't that hard to rethread correctly, i was so happy that sears had the SAE rethreading and dies, just kinda took a long time to do cuz i didn't wanna make it worse kinda thing and thx again everyone for the help

nycgps

iTrader: (1)

I had misfires before. couple of times.

but it disappeared ...

Trick? I dont know, I re-seat all the plugs. wires, and fuel injector cleaner and Redline Fuel System cleaner.

GatoEnFuego

Cylinder?