When to replace Ignition coils. (3 Viewers)

[2001LC]

673-1303 Is a Denso part.

90080-19027 is a Toyota part which they bought from Denso and must mark-up accordingly.

Toyota has to mark the product up to cover their overhead, and secondary manufacturing process (to add the Toyota logo and part number or at least to use that mold cavity in this case). This same principle holds true with ALL re-branded OEM parts.

The big car makers like Toyota make plenty of their own parts, but many parts are made by Denso, Aisin, Koyo, NSK, Timken, Nippon, Bosch, Delphi, TE, etc... You can buy the third party parts through the OEM (Toyota), but you are paying for Toyota branding and their distribution channels. Rock Auto, Amazon and other large retailers have FAR better distribution networks than Toyota, Nissan, Ford, etc... This allows for a significant price difference when comparing the same product.

This is a universal phenomenon with import vehicles from either Japan or Germany (and possibly other places). You can buy OEM always and get great parts - or you can figure out who actually made the part (rarely is it the OEM for non-body, non-cast metal pieces) and save on all that dealer markup, OEM branding and distribution short-falls.



I'd be shocked if the Denso parts were rejects based on otherwise Toyota destined parts, but there is machining marks in the area where the Toyota logo would go. [shrug]

Anecdotal story: My previous employer made industrial measurement equipment. High precision, high dollar stuff. They also sold accessories to pair with it. Printers, Clamps, Hardware, Cables, etc... All of the accessories were literally just repackaged parts made by another company. Our contribution was solely a new part number of our own and new packaging. Zero value added, no testing done. We would buy accessory X off the shelf for $5 each and sell them for $50-100 each. The markup was purely made up to cover our extra, unnecessary re-branding and limited only by what we thought would drive too many customers away from our main product. Our OEM branding added nothing to the product, but in customer minds it added unbelievable value. We joked that we had a sickening license to print money. I had limited customer interaction unless they needed odd tech support or something, but I even told them they could buy part X online or in a store and they would just shrug it off and buy the re-branded stuff just to make sure it was the "right thing".

Another way to think of this situation is that Toyota, as a corporation, has no desire to just sell parts. They sell parts because they have to. If they don't sell parts then they can't sell what they really want to sell... CARS. This doesn't even take into account the dealers! The dealer, who you actually buy parts from, marks the product up AGAIN, usually 20+%, just to cover their operating costs and profits.

Wow, didn't expect that to turn into a novel. Sorry about that. Anyways... When you can determine the actual manufacturer of anything, buy it through them. I've never seen or heard any evidence that points to quality differences from an original source and the re-branded OEM.

Be interesting to get response from Denso on this. My bet is they are either pass or fail tested, no in between.

 

[hkeller]

I misspoke. Sorry. I meantI packs, not plugs. Second set of plugs goes in next week.

 

[Battleship]

Be interesting to get response from Denso on this. My bet is they are either pass or fail tested, no in between.

I don't think they test all of them, just a certain quantity per production run, and extrapolate those results to the whole batch.

 

[Pritchnakoff]

Thought I'd add to the thread, '98 with ~223K, P0307 code came up just this past week. Rig is new to me and was displaying absolutely no signs of rough running or sporadic idle. Reviewed a few threads and swapped out the #7 Engine Coil and all codes were good.

I'll watch out for any change in mileage, but have only gotten 1 tank of gas since I've owned her, so not sure I'll have anything to document. Seems to fit the rest of the post however around the 200K mark some of these start to go haywire.

 

[Julian Stead]

Just paid $120 for 8 denso coils of ebay so will be changing mine as soon as they arrive, mine are on 172,000 with no issues, will report back after replacement.

 

[2001LC]

Just paid $120 for 8 denso coils of ebay so will be changing mine as soon as they arrive, mine are on 172,000 with no issues, will report back after replacement.

That is a great price, almost too good!

 

[Julian Stead]

Yes, had a good price,they were up for auction as a set of 8 with damaged packaging. My max bid was $200 but surprised to get them so cheap, I have got to pay import tax and postage which takes it up to around the $200. You can't buy denso in the uk and toyota oem are £100+ sterling so I am well happy.

 

[Julian Stead]

Finally got around to changing them, the ones fitted where not the originals as they had a 2001 date stamped on them. The packaging wasn't even damaged just one had been opened.

Will be keeping the old as spares. Not expecting any improvements as it was running ok anyway, just at such a low price I had to change them.

 

[2001LC]

I've been keeping an eye out for set, every since your amazing winning bid.

What parts numbers are molded into the tops (picture)?
Are you going to match them to all new spark plugs?

I've not had time yet to run a test of old coils. What I need, is to find someone (with free time) locally with a scope that can accurately measure what's going on with each coil. Then introduce both new and old coils of various ages into the test. If we see any change in current drawn, output or duration we'd then know if replacement as PM is worth it.

I've suspected coils incremental degrade over time, only performing at peak performance when new. That, as they age they'll draw more current to keep up with demand, increase internal heat. We know that a bad/weak spark plug will draw more current from it's coil, running coil hot. Coils running too hot will fail. Some have report rough running engine or reduced performance before a bad coil trips the CEL. This indicates coils don't just go from 100% to failure at one moment, but over time.

On another note; I recently did a compression check for a friend on his new high millage rig. I found two cylinders that had very low but passable compression. Interest those cylinders had aftermarket replacement coils. It's the chicken and the egg store, which came first. Could those cylinders be building up carbon on compression rings do to inadequate spark, or did poor compression cause coil failure.

 

[Julian Stead]

I have very recently changed the spark plugs so I didn't need to swap this time, they probably only have 2K on them. Here is a photo of the top of the coil. Number on the top is 673-1303.

If I still had my oscilloscope I would of taken a snap shot of the primary windings pattern , but I sold it when I left the trade as they are to expensive to have lying around doing nothing.

A cylinder leakage test would be the first step to find out why the compression was low, maybe some fuel cleaner or similar to get ride of carbon deposits might be all that is needed. I would say it was either a misfiring cylinder which caused the issue or the coils where changed due to mis-diagnosis and it is a mechanical issue.

 

[Julian Stead]

The company that put them up for auction was called Cargolargo.

Bargain, I did end up paying $57 import duty on entry to UK, so in total it ended up being close to $195.

 

[autiger888]

Yeah, who knows? I didn't even spring for the Densos and bought the totally cheap ones from eBay. They work fine so far (2 months) at $15 each.

My parents worked for GE a million years ago. They said that for some common parts, production runs with a failure rate of x would go to Japanese manufacturers, 2x would go to Americans, and 3x would go to parts stores. I made those numbers up, but that is why I made that assumption.

Any issues with these yet? Contemplating going this route.

 

[rockcruiser915]

Bought a complete set of these off of Amazon for $69 with free shipping:

ECCPP New Set of 8 Ignition Coil on Plug Coils Pack For Lexus GS430 GX470 LS430 LX470 LX570 SC430 Toyota 4Runner Land Cruiser Sequoia Tundra V8 B277 UF230 5C1196 9091902230 9008019027
by ECCPP
4.4 out of 5 stars 24 customer reviews

Price: $68.68 Free Shipping for Prime Members



I paid the ridiculous price of $8.63 per coil. I've been running them since February, 2016 without issue. The difference in power after swapping out the old coils was immediate, significant and lasting. Hope this helps someone.

 

[SWUtah]

I'm going to ask my local Lexus dealer what they would charge to change all 8 coil packs? This way you guys can tell your wives how much money you saved. Lexus Dealer $85 for each coil pack and $135 labor to install them. About $900 for them all. Plus all the free cookies I could eat and a loaner car

 

[Battleship]

Any issues with these?

So far, so good. 4-5k mixed driving.

 

[autiger888]

Thanks for the quick response. I'm a newbie but I'm already loving my 1999 LC. Wanted one for years.

 

[gravelsink]

I purchased the ECCPP coil packs and have had them in about 30 days, two have failed so far. My wife did take a road trip so about 1000 on first failed coil pack. Supplier sent two replacements the first time but I just found out today that I was sent the wrong coil packs. I put on old denso coil packs with most likely 200k miles on them to replace the failed ECCPP ones. Denso one's fixed the issue.

Maybe I didn't put enough dielectric grease on ECCPP rubber boots but the boots stayed behind both times.

I am purchasing 8 new Denso coil packs and putting the ECCPP coils on the shelf as a backup.

This was on a 99 LX470 with new Denso plugs.

 

[lifer]

These are the ones from Amazon for around $76 for the set. I've only had them in for a week - so far so good! Are they better than the 7 old ones? I would say a resounding "YES!" based on my now purring engine.

http://amazon.com/gp/product/B00LAXJPQG?psc=1&redirect=true&ref_=oh_aui_detailpage_o05_s00

Update: After a little more than a year, 2 of these new coils failed. I was able to clear the codes by replacing them with the old coils I saved from last year. Sorry I had recommended them. Denso for me from now on.

Update: Another one failed. Now 3 out of 8. I just order 2 new Denso coils for the next time.

 

[Wellcraft19]

1999, 126K miles, first and only coil so far.:
Car started running horribly rough, felt like "chugging" even when going very slow (so bad I feared it was possibly the torque converter as idling initially seemed OK). Slowly limping home I passed O'Reilly's so I stopped to borrow their code reader, and sure enough, code P0301. Coil pack on Cylinder 1.
I'll order two Denso's from Amazon to have one in the car.
We tend to forget how finely tuned and silky smooth these V8s are, and how horribly they can run when just a bit "off kilter", as when one cylinder is not firing.

 

[oakback]

I've had 3 coils fail in the last year. Rather than replace them all ($$$) I just carry my OBD scanner, a spare coil, and a basic socket set with me at all times. Usually it'll start failing with a slight random hesitation, then when my wife drives she'll floor the gas to pass someone and it'll blow the weak coil.