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sooo, my '95 mtx v6 tour is missfiring in the primarys pretty bad... but not in the secondaries. she probably needs some updating. This is what I plan to do:
-plugs
-plug wires
-fuel injector cleaner
-fuel filter
-ignition coil
anything else I should do???
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Joined: May 2000
Posts: 21,197
I have no life
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I have no life
Joined: May 2000
Posts: 21,197 |
Just wires first. Check plug gap to see how bad they are unless you know they are old like everything else in your engine bay. 
-'96 SE MTX 3L
-'98 SVT 1,173 of 6,535
-'05 Mazda 6s, loaded, g/f's ride
-Need a 96-00 manual on CD? PM or email me
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Last edited by Tony2005; 07/12/06 08:13 PM.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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Joined: Aug 2001
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Hard-core CEG'er
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Originally posted by blu_fuz:
sooo, my '95 mtx v6 tour is missfiring in the primarys pretty bad... but not in the secondaries. she probably needs some updating. This is what I plan to do:
-plugs
-plug wires
-fuel injector cleaner
-fuel filter
-ignition coil
anything else I should do???
This is a classic "bad ignition wires" symptom.
The problem is bad in the lower rpm when you give it gas but clears up as they rpms climb.
This is because the coil duty cycle gets shorter as rpm increases since there is less time between cylinder firing. Each coil fires in wastespark method once per revolution.
When the duty cycle is long the coil gets oversaturated; as the wires go bad their resistance changes and this culminates in ignition spikes that can sort of fire the coil too early and then when it tries to fire it can't.
All those things are good to do, probably an intake cleaning as well. Change the order to Wires first and recheck the plug gap.
Save the fuel injector cleaner for last and it never hurts to do the fuel filter. However, logically if it was a fuel issue it would crap out more as rpm climbed since there is a higher fuel demand at higher rpm. Right?
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black
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Joined: Sep 2002
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damn u guys are good... I will be doing all of those now, including the intake cleaning, kuz i just bought another car so I can now work on my tour... thanks again, JOE
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So if it slowly got worse, like shuddering at a higher RPM as the miles roll on(I'm talking over the course of 2K), would that still be plug wires? How bout loss of power below 2k RPM? (yes, I checked vacuum leak and did everything short of spending the money on plug wires). 52k on the odo.
95 LX-with a mind of its own
24v DOHC
SVT exhaust and K&N=all thats worth modding
Go Fighting Sioux!!!
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Joined: Sep 2002
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like he said, "plug wires" accel has nice ones.... that's where I am getting mine...
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