Problem Description and Possible Solution
Defective or worn out ignition coils can cause engine misfires and Check Engine Light illumination. If the problem is severe enough engine performance will suffer and the Check Engine light will flash on and off.
Average mileage: 105,372 (14,900–214,000)
Engines affected: 2.5L 4 Cylinder, 2.6L 4 Cylinder, 3.0L V6
145 people reported this problem
I just received this car as a present from my grandfather. It was not driven for 2 years. I had problems driving from S. Diego. Car Shaking and not changing gears properly. The mechanic diagnosed the problem as misfiring and problem with catalytic converter.
The Mechanic recommended that i replace all the coils and replace the catalytic converter.
What is a normal price for both jobs and how many more years could i realistically get on the car?
About 86k and at in 2011 coil 4 was misfiring. Water of course. I changed it only to think I should go ahead and change all plugs and coils (I used 100% OEM). Now I got 92K in 2012 and coil 3 is misfiring. Here we go again. Thanks Mazda! This next repair will be the 4th time I gotten to the back bank of plugs. I not only used OEM, I made sure to use dielectric grease with each coil and it still didn't stop it. Maybe I got a bad one but after reading about people taking it to the stealership and having the same problem I'm just plain fed up! Now I have the cheap 6 pack of coils with good Amazon reviews on order (under $100 shipped) and a six pack cold in the fridge for the next time. I'm going to spend about 3 hours to change one spark plug and one coil pack. To keep sane I will have a couple of drinks before starting this repair! This will be the first and last transversely mounted v-6 I buy. I think I'll buy some fire resistant weather stripping for the hood to see if it can prevent the water intrusion that seems to causing all of this. I'll have to try that just see if this stops the problem. To everyone in the same boat, my heart go's out 2 all of ya!-Rich
I have the same problem with the cylinder 2 coil. can anyone help? check engine light flashes on and off
Rough idle, power loss, check engine light on and/or flashing.
Second time in past 2 years.
Had Coil/Plug issue at 135K caused ROUGH idle and hesitation while driving... Fixed and no engine issues.
Engine light kept coming on due to misfire. Had coil and plug replaced, which lasted a week, and light came on again. Finally had all coils done. Best to have them completed all at once to save $$ in labor.
Specific engine coils and spark plugs, then all replaced (90k)...corrosion in the coils. About a year later, mechanic finds water in the cylinders and suggests that water is entering the engine due to a faulty design. Engine is running rough again (100k), lots of hestitation and definitely not the powerful van it once was...Will have the engine seal checked as another person suggests, thanks!
Update (103K): Engine seal is fine. Mechanic will create a diversion for the water hitting the rear engine coils. I will again replace all coils and utilize the diversion in hopes that the coils will last longer...I did call a Mazda dealer who was kind enough to tell me that the coils only last 1-2 yrs for whatever reason and that he did not know of a repair for it apart from continuing to change them. :( I have never had the check engine light come on...which would be nice so I know which coil needs replacing. Ebay has them cheap with a lifetime warrenty. I'm going that route.
Update Feb, 2012(104k): Engine finally came on...One bad coil. Replaced all coils and plugs (purchased coils on ebay). Mechanic created a system with fireproof tape to divert water away from rear engine coils...however, he said that the coil did not have water corrosion this time and therefore he was not sure this will eliviate the issue. Running great for now!
Update Feb, 2014(133k): Last year we had the leaky PCV Valve...Now a Bad coil again, #6 this time (front). It lasted two years which is a record so far. Mechanic recommends replacing all of the coils, plugs...wants $1400. That's about 1/2 value of my vehicle at this point. Pretty fed up with replacing the coils all the time. It's obviously a defect in design. We only replaced coil #6. We'll see how long it'll be before it starts acting up again.
The engine hesitates/chugs after driving in snow for 40 minutes or more- no other time. Continues to hesitate about every 5 minutes or so. Check engine light has not come on. Took it in to dealer, said they couldn't repair it w/o check engine light on, but speculated it was coils. It happened on our '04 MPV as well.
I believe we've replaced 3 or 4 ignition coils already. Is there a recall yet? My vehicle is under 100,000. This is just ridiculous. We're still paying for this used vehicle and this is not a cheap fix.
Engine misfired causing shaking and flashing check engine light. Changed all 6 sparkplugs, cleaned maf sensor,tthrottle body, IAC valve and then replaced ignition wires. Still misfiring!!! Was told we need new coils most likely.. Not sure how much this will cost however the van is only with a grand tops.
Still an issue with 90K on the vehicle. I went to 1 mechanic who suggested I may have a water intrusion problem into the engine compartment. We opened the hood and sure enough....the rubber gasket the seals the top of the engine compartment against a closed hood had failed. I just ordered the part for $25 and popped a new one in. I still have to replace the failed IC...but this should help reduce the water/melted snow getting into the top rear of the engine.
Three coils failed (#4, #2 and #5) and all six coils replaced over 2 years - this is my 2004 MPV story:
75200 miles: Van runs fine, parked and engine cooled down for 2 hours during sport event. Moderate misfire at starting van up again. Engine light on (code P0304) - dealer replaced #4 coil.
87200 miles: Van runs excellent on long trip driving hard & many uphills. Engine cooled down for 5 minutes during view stop on cold mountain pass. Very rough misfire at starting van up again. Engine light on & flashing. I nursed the van to destination 80 miles on. Drove to dealership next morning with engine light on, but no misfire(???). Code P0302 found and I decided to replace #1, #2 & #3 coils on rear side to save on future labour. Expensive.
87450 miles: Following day, hard, no-problem driving on trip back. Stopped 15 minutes for a burger and rough misfire back immediately upon startup. OMG !! I nursed the van back home the last 120 miles with an intermittently flashing engine light on. Developed the (wrong) notion that this must be a fuel problem. Left the van for a week, with no misfire and no engine light on thereafter (What's up doc ??)
88400 miles: Go shopping, van cools down for 15 minutes. Rough misfire upon startup, with light on and flashing. Dammit. Code P0305 diagnosed. After getting dealer to swap coils and confirm faulty coil as the problem, I replaced #5 and #6 coils.
Today, 93000 miles: Problem-free driving at full power for 5000 miles.
My conclusion: Temperature changes have a mystery and surprise-factor effect on deteriorated or old coils.
Went out while still under warranty (just), and again at approx. 90k. Both times the engine light came on and the engine was hesitating slightly. Then one went out again approx. 1500 miles later (local mechanic said it may just have been a bad coil from the manufacturer however the engine hesitated so bad I could barely drive the van to the shop that time around).
I bought this vehicle used. I love everything except for ignition coils failing. Replaced 2 at 70,000 miles now need more ignition coils at 140,000 miles. Mazda should have a recall of the MPV do to the many ignition coils complaints.
Can not remove the key out of ignition when I put in park
I had a complete tuneup done as well as coil #4 replaced. I just got the same problem again and now I am have the other 5 coils replaced. also got an error code to have a software update done. I am having that done tomorrow. Can't complain too much seeing I have had the van for 6 years and had no problems til now.
Same problem. I think I've had all of the coils changed now what looks like another coil failure. Had issue on mountain trip almost identical to a visitor above -- failed on way up -- had it fixed --- seemed to fail on way down then next day fine. 10k miles of problem-free motoring. Thought it was a fuel problem (a friend of mine with a Honda reported he had bad fuel that weekend).
From what I understand this is a Ford engine. Reminds me of the days my dad used to have to work on our '72 LTD once a month to keep it going.
Same problem I just changed the spark plugs and got its power back but a few days late the problem came back...not cool...I'm gonna try changing out the coil of the one that's bad and the spark plug as well and see how that goes.
Bad coil problem began at about 85,000 miles and seems to reappear about every 4--6000 miles (different plugs)
Very expensive to repair. I'm at. 129,000 and am considering replacing the car (MPV).