mclarenross Posted July 4, 2015 Share Posted July 4, 2015 Hi guys, ive been told I've got a misfire at higher revs and I should change my 23 year old coil packs. Has anyone ever used these ones before... http://m.ebay.co.uk/itm/121694894216?nav=SEARCH or these http://m.ebay.co.uk/itm/121438272335?nav=SEARCH i don't really want to have to fork out a small fortune for oem. Just positive and negative experiences if you have used either of the two products. Ill be running c450 bhp on a single. Thanks Quote Link to comment Share on other sites More sharing options...
Abz Posted July 4, 2015 Share Posted July 4, 2015 Not used either but from experience and from loads of guys running singles and aftermarket coil packs it seems the OEM are the best. You'll see a few threads on the forum where people had misfire issues like you and then were solved with replacing the CP's with OEM's. Quote Link to comment Share on other sites More sharing options...
mclarenross Posted July 4, 2015 Author Share Posted July 4, 2015 Sounds like good advice. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 4, 2015 Share Posted July 4, 2015 How are your coil clips? Quote Link to comment Share on other sites More sharing options...
mclarenross Posted July 4, 2015 Author Share Posted July 4, 2015 I replaced them for new one about 6 months ago. Quote Link to comment Share on other sites More sharing options...
Nic Posted July 4, 2015 Share Posted July 4, 2015 Denso manufacture the coil packs for Toyota, it should work out a fair bit cheaper to buy direct from a Denso supplier in the US, if you do a search here it'll bring up the part number and links to suppliers http://densoautoparts.com/find-my-part/vehicle-selection Quote Link to comment Share on other sites More sharing options...
Dnk Posted July 4, 2015 Share Posted July 4, 2015 Isn't there a way of checking the coil packs using a multi meter ? Quote Link to comment Share on other sites More sharing options...
bignum Posted July 4, 2015 Share Posted July 4, 2015 Have a look at your ones, if the housings are cracked(common problem) then they`re due for replacing. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 4, 2015 Share Posted July 4, 2015 Also before committing to new coils, check the spark plug gaps. Quote Link to comment Share on other sites More sharing options...
Shane Posted July 5, 2015 Share Posted July 5, 2015 Isn't there a way of checking the coil packs using a multi meter ? You could only check for the impedance of the primary and secondary windings by comparing the coil resistance against a known good one. If one of the windings were at fault you would most likely know anyhow unless it was just a case of a few shorted turns on the secondary winding, most likely you wouldn't have a spark on that one anyhow. You wouldn't be able to check for things like insulation breakdown between windings really, I guess you could use a Mega style tester for this but even then its not going to provide any really useful info. It's normally the external insulation that breaks down and causes problems, and this is often visible. Have a look at your ones, if the housings are cracked(common problem) then they`re due for replacing. Absolutely, in particular, take the silicon boot off and look under a magnifying glass in good light for tiny little hairline cracks at the very tip of the coil pack. These are the ones that will really cause you issue, more so than the large visible cracks that appear around the screw fixing holes on the top. Quote Link to comment Share on other sites More sharing options...
mclarenross Posted July 5, 2015 Author Share Posted July 5, 2015 Thanks guys, yeah I've re gapped my plugs to .25 (1jz) just thought whilst I'm at it and as the originals are so old I'd just replace the lot. Ill check out that Denso link. Thanks Quote Link to comment Share on other sites More sharing options...
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