Scion xD: A Misfire Killed The Alternator?
video description
Regarding the ignition coils, I never recommend replacing just one unless it is some freakishly low-mileage failure. Think about it. All of the coils are living in the same environment, doing the same job. If one fails, basic logic would say the others are right behind it. On top of that, I ve seen so many instances where customers want to replace the coils one at a time, and they usually all fail and need replacement within 6 months, often requiring a catalyst replacement shortly afterwards (due to all the misfires. I always recommend replacing all the coils (except for freak occurrences, like I said) so when I have a customer who insists on replacing them one at a time, I charge diagnostic labor and full replacement labor each and every time. I refuse to pay for someone s cheapness.
Date: 2022-08-06
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Comments and reviews: 13
John
Based on my own experience / observation around aircraft. where PREVENTION is the name of the game. perhaps everyone is better off when ALL 4 Coils are replaced when ONE FAILS. Esp. on an in-line 4 where it is only MINUTES to CHANGE all of them.
In my own case, I REPLACED (all 6) Coils (with OEM parts) on my Toyota / Lexus SUV. along with the mandatory (all 6) iridium plugs change-out. at the 120K service.
The dealers love to just ignore the coils and then come back and change each coil as it fails. one-at-a-time; 700 for each rear coil. And 400 for each front coil. Ditto the alternator at high mileage. BTW. I AGREE with the Lady. change that ANCIENT ALTERNATOR, too!
John in the NW
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Based on my own experience / observation around aircraft. where PREVENTION is the name of the game. perhaps everyone is better off when ALL 4 Coils are replaced when ONE FAILS. Esp. on an in-line 4 where it is only MINUTES to CHANGE all of them.
In my own case, I REPLACED (all 6) Coils (with OEM parts) on my Toyota / Lexus SUV. along with the mandatory (all 6) iridium plugs change-out. at the 120K service.
The dealers love to just ignore the coils and then come back and change each coil as it fails. one-at-a-time; 700 for each rear coil. And 400 for each front coil. Ditto the alternator at high mileage. BTW. I AGREE with the Lady. change that ANCIENT ALTERNATOR, too!
John in the NW
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Simon
At that mileage it would soon need new brushes, so probably best to change the whole unit.
Over here in the UK we have a lot of 4-cyl diesels and for the past 20 years most have dual mass flywheels, therefore the crank acceleration and deceleration during one cycle is way higher, so the clutch pulley is an essential part.
The most common failure is for them to lock up solid, the belt makes horrendous noise below 1200rpm when they do.
Not had many fail where they just slip either way, only two or three.
My most common repair is to replace the regulator/brush pack for no-charge conditions, can usually do these in situ or without fully removing the alternator.
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At that mileage it would soon need new brushes, so probably best to change the whole unit.
Over here in the UK we have a lot of 4-cyl diesels and for the past 20 years most have dual mass flywheels, therefore the crank acceleration and deceleration during one cycle is way higher, so the clutch pulley is an essential part.
The most common failure is for them to lock up solid, the belt makes horrendous noise below 1200rpm when they do.
Not had many fail where they just slip either way, only two or three.
My most common repair is to replace the regulator/brush pack for no-charge conditions, can usually do these in situ or without fully removing the alternator.
reply
Deaftractor
You say misfire kill alternator. I watch your video. It not kill alternator. Misfire hurt alternator, my answer is yes that will happen. If that alternator computer built in. My experience 2011 ranger has spark plug wire set has spark leaking because spark plug tube oil leaking. If misfire cruise control disconnect itself. Had to clean out oil in spark plug tube ounce a. monthly until replace valve head gasket when it weather cool off.
My question some new vehicles built in itself steeling auto driving while spark leaking will auto steeling out control and wreck. I can t trust.
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You say misfire kill alternator. I watch your video. It not kill alternator. Misfire hurt alternator, my answer is yes that will happen. If that alternator computer built in. My experience 2011 ranger has spark plug wire set has spark leaking because spark plug tube oil leaking. If misfire cruise control disconnect itself. Had to clean out oil in spark plug tube ounce a. monthly until replace valve head gasket when it weather cool off.
My question some new vehicles built in itself steeling auto driving while spark leaking will auto steeling out control and wreck. I can t trust.
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BruceD
One note on replacing coil packs for misfires - I have a 2007 Fit that I did the plugs on, NGK Iridium (or so I thought. 8000 miles later a misfire developed on one cylinder. Swapped coil packs around to verify and the misfire moved with the coil pack, so I replaced it. Decided to check the plugs, and the gaps were massive! Turns out the plugs were counterfeit, and the iridium tips were completely gone. One coil pack was weakest, but the rest were sure to go soon. The counterfeit plugs are pretty hard to spot, so beware, and be sure to check the plugs when replacing coil packs.
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One note on replacing coil packs for misfires - I have a 2007 Fit that I did the plugs on, NGK Iridium (or so I thought. 8000 miles later a misfire developed on one cylinder. Swapped coil packs around to verify and the misfire moved with the coil pack, so I replaced it. Decided to check the plugs, and the gaps were massive! Turns out the plugs were counterfeit, and the iridium tips were completely gone. One coil pack was weakest, but the rest were sure to go soon. The counterfeit plugs are pretty hard to spot, so beware, and be sure to check the plugs when replacing coil packs.
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Shuken
Sometimes it's worth slapping a cheap part like a coil in to see if it fixes it, because it's cheap enough to risk having to eat the cost for the time savings. And sometimes you're willing to spend some extra money to get the car back quicker. Maybe one of them has to miss work with only 1 car and it's cheaper for them to spend the extra and get it back than miss another day of work, that's how it is for me. Plus, now they're got a whole new alternator so they shouldn't have to worry about the rest of it going out any time soon.
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Sometimes it's worth slapping a cheap part like a coil in to see if it fixes it, because it's cheap enough to risk having to eat the cost for the time savings. And sometimes you're willing to spend some extra money to get the car back quicker. Maybe one of them has to miss work with only 1 car and it's cheaper for them to spend the extra and get it back than miss another day of work, that's how it is for me. Plus, now they're got a whole new alternator so they shouldn't have to worry about the rest of it going out any time soon.
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Danny
Had a 2011 jeep patriot come in yesterday. Mo start after the customer put in a battery. Didn't make no sense as the alternator had been replaced as well. Got more info about the prior issues. Well turns out it had a p0688 no ASD sense at the pcm. Relay was not activated on 30 which supplies 1 coil and 1 injector. Had power on 85 and 86. Nothing on 30. Well 86 is ground control through the pcm. Alternator he was driving it on for who knows how long internally shorted the PCM.
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Had a 2011 jeep patriot come in yesterday. Mo start after the customer put in a battery. Didn't make no sense as the alternator had been replaced as well. Got more info about the prior issues. Well turns out it had a p0688 no ASD sense at the pcm. Relay was not activated on 30 which supplies 1 coil and 1 injector. Had power on 85 and 86. Nothing on 30. Well 86 is ground control through the pcm. Alternator he was driving it on for who knows how long internally shorted the PCM.
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Xombi
246k on a yoda at 23 years and a problem again a year later. Sounds like a lemon law case for Duewe, Cheatem and Howe. . Seriously, we should all be so fortunate. On the lady's side if you really need to rent a car, the going rate is over 100 a day. If cars are available, and they lie about that. . Will an aftermarket overrunning clutch match up and work? Eric has the part, the correct part to solve it in hand. Back to school time and sales to be at. good vid thanks.
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246k on a yoda at 23 years and a problem again a year later. Sounds like a lemon law case for Duewe, Cheatem and Howe. . Seriously, we should all be so fortunate. On the lady's side if you really need to rent a car, the going rate is over 100 a day. If cars are available, and they lie about that. . Will an aftermarket overrunning clutch match up and work? Eric has the part, the correct part to solve it in hand. Back to school time and sales to be at. good vid thanks.
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Leigh
Had a failed alternator on a Mazda tribute, client wanted a second hand one to replace it, so I asked my son to get it from his local pick a part, same sort of place as Wilberts.
He thought he wouldn't have to much trouble, not realising that it was between the firewall and the block just above the suspension and the car was on the ground, by the time he got it out the place had closed and everyone had gone, gates locked and guard dogs loose. oops.
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Had a failed alternator on a Mazda tribute, client wanted a second hand one to replace it, so I asked my son to get it from his local pick a part, same sort of place as Wilberts.
He thought he wouldn't have to much trouble, not realising that it was between the firewall and the block just above the suspension and the car was on the ground, by the time he got it out the place had closed and everyone had gone, gates locked and guard dogs loose. oops.
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Robin
In 50 years of working on pretty much anything with a engine I have never seen an over run pulley or de-coupling pulley. Man I learn something everyday. Oh yea, I was also wondering, do you have your residence at your shop? I see your wife in a kitchen there at the shop and I don t know of any shops around here with a kitchen. Thanks and keep up the fantastic work. I watch just for things like today.
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In 50 years of working on pretty much anything with a engine I have never seen an over run pulley or de-coupling pulley. Man I learn something everyday. Oh yea, I was also wondering, do you have your residence at your shop? I see your wife in a kitchen there at the shop and I don t know of any shops around here with a kitchen. Thanks and keep up the fantastic work. I watch just for things like today.
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Daniel
Oy, Transverse engines and serpentine belts. I miss the old days when everything was accessible and easy to change. Once I replaced the fan clutch on my Thunderbird 429, replaced the radiator and serviced the carburetor all in one day. Overheating with the a/c on, and sticking float problems solved. 1970 cars were so much easier. Vacuum lines were a weekend job.
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Oy, Transverse engines and serpentine belts. I miss the old days when everything was accessible and easy to change. Once I replaced the fan clutch on my Thunderbird 429, replaced the radiator and serviced the carburetor all in one day. Overheating with the a/c on, and sticking float problems solved. 1970 cars were so much easier. Vacuum lines were a weekend job.
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Extra
mr O do you tighten the belt tension to that spec whenever you remove and install the belt or do you only do that when its a new belt. because when I work on that drive system i just mark the bolt with a paint marker then return it back to original spot. just curious of reasoning. only thing I could think of is the new belt isn't going to have as much stretch
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mr O do you tighten the belt tension to that spec whenever you remove and install the belt or do you only do that when its a new belt. because when I work on that drive system i just mark the bolt with a paint marker then return it back to original spot. just curious of reasoning. only thing I could think of is the new belt isn't going to have as much stretch
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Madman
When I was a young shade tree mechanic in the mid 80s I remember swapping out the alternator on my then 1976 Gran Torino on the side of the road (were it died) in under 30mins. I m older now and the charging systems on cars today are much scarier. Somewhere down the line I think I ve lost my youthful, I can fix anything, mindset. Great job Eric O!
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When I was a young shade tree mechanic in the mid 80s I remember swapping out the alternator on my then 1976 Gran Torino on the side of the road (were it died) in under 30mins. I m older now and the charging systems on cars today are much scarier. Somewhere down the line I think I ve lost my youthful, I can fix anything, mindset. Great job Eric O!
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Stapleford
My 2006 kia Sportage 2. 0 CRDI gen2 had a new LUC dual mass flywheel fitted (at my request) when the car had a new clutch at 70 k miles 5 yrs ago
16 months an 5 k miles later the DMF fell apart Kia were not interested so local indi removed and replaced LUC said it was more than likely due to a misfire but no warranty Been ok since
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My 2006 kia Sportage 2. 0 CRDI gen2 had a new LUC dual mass flywheel fitted (at my request) when the car had a new clutch at 70 k miles 5 yrs ago
16 months an 5 k miles later the DMF fell apart Kia were not interested so local indi removed and replaced LUC said it was more than likely due to a misfire but no warranty Been ok since
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