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Mazda Protege, Sedan
#3368 of 3742 2003 Mazda Protege with check engine light for 2yrs
Jul 30, 2008 (1:36 pm)
To all you guys and gals out there with a Protege that runs rough with a code that says intermittent misfire, here is what it took to fix the problem.
Spark plugs, coils , wires, injector flush, new PCV valve and count 'em four fuel injectors. One was really bad and the dealership put in one new injector and 3 used ones. All of this was covered under the extended warranty we bought 5 years ago. All the work worth about CAD 2600. Not a cent did we pay to have this troublesome problem fixed. So far, no more check engine light and the car is purring. Hope this helps other people out there with the same problem.
Aug 05, 2008 (2:02 pm)
Tuesday means Mazda chat night! The chat opens at 8:45 pm ET and runs until 10 pm ET. I hope you're able to join us tonight to meet and greet with your fellow CarSpace members!
See you there!
#3370 of 3742 Re: newbie needs help [kenjen]
Aug 08, 2008 (2:48 am)
got the code it is a 7-rich/lean detected,I would expect this being the spark from the coil is weak.there is full battey voltage at the coil,ignitor tested ok and coil ohmed out within spec. :
#3371 of 3742 94 protege dx
Aug 11, 2008 (1:44 pm)
where is the egr valve on a 94 sohc protege?
#3372 of 3742 Re: 94 protege dx [kenjen]
Aug 11, 2008 (2:20 pm)
I don't think it has an EGR valve.
#3373 of 3742 Re: newbie needs help [kenjen]
Aug 12, 2008 (3:28 am)
could this be the problem???????? if i squirt wd at the base of the injectors the car stumbles which I guess means it is sucking air ,bad o-rings? chime in, the auto parts store wants 7 bucks for the o-rings hardware store 20 cents?
#3374 of 3742 Re: newbie needs help [kenjen]
Aug 12, 2008 (8:24 am)
Chances are it's a non-standard o-ring. Most of what you'll find at the hardware store is nitrile. You can try using it, but it may not fit right or might not be the material you need (EPDM, viton, silicone, etc). So what's worth more: your time or $7?
#3375 of 3742 Re: newbie needs help [maltb]
Aug 12, 2008 (11:31 am)
Yeah i thought about that 2 seconds after i hit the send button,After all the threads I have seen where people have spent big bucks chasing these rough running symptoms down 7 bucks is a cheap fix, thanks,Kenneth.
#3376 of 3742 Re: newbie needs help [kenjen]
Aug 16, 2008 (9:27 am)
well the injector seals didn't help, has anyone ever looked at the spark comming off the coil to ground? I am still thinking it is a lack of good spark but I am getting conflicting opinions on wether or not a yellow spark is bad or not.I tried a delco coil out of my jeep and it too shoots a yellow spark, if the timming belt jumped a tooth would that cause it? I feel like i am swimming in a pool of sharks!!
#3377 of 3742 Re: newbie needs help [kenjen]
Aug 18, 2008 (7:28 am)
I would continue to look for air leaks. If spraying around the injectors changed the RPM, look for a leak doing that with a spray carburetor cleaner.
Focus on rubber parts like intake boots, vacuum hoses and grommets.