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General => The garage => Topic started by: Jaguar4321 on 10 September 2012, 18:37

Title: Denso AVOID Denso AVOID !!!!!!!
Post by: Jaguar4321 on 10 September 2012, 18:37

Had a remap, all was good until warm, under boost started to misfire and hold back, changed the cheapo Denso's and the all is fine! Anyone else had this?

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: topher on 10 September 2012, 19:43

yep seen it plenty of times. cheap parts often work "okay" on standard cars, but they will show their faces for the inferior imitations that they are when you ask for more from the engine!

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: Jaguar4321 on 10 September 2012, 19:46

So true!
Lesson learnt!

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: Chris. on 10 September 2012, 19:48

I was running IK22's at 40quid a pop and they started to misfire under load on spool up.  Changed to some NGK platinums and were spot on.

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: Jaguar4321 on 10 September 2012, 20:09

How much are the NGK platinums?

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: Chris. on 10 September 2012, 20:21

about £30 to the trade.

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: tshirt2k on 10 September 2012, 21:11

Don't always blame the plugs. They may not be gapped correctly. I have ik22's gapped at 0.7mm and have had no problems. Although before I gapped them correctly I had some misfires.

Quote

It is almost always necessary to use a plug with a smaller gap setting when running increased boost. The additional charge in the combustion chamber dictates that more voltage is required to jump the standard spark plug gap. Options are to close the original gap of the standard plugs by approx 0.2mm, this will relieve the strain on the ignition system, meaning a smaller voltage will be required when off boost and when on boost enough voltage should be available to fire successfully and reduce the risk of misfire.

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: Jaguar4321 on 10 September 2012, 21:54

Ok, also makes sense, thanks

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: Jaguar4321 on 10 September 2012, 21:55

Maybe being a bit hard on denso spark plugs?

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: MS1COYS on 10 September 2012, 23:17

I've got denso iridiums and they're smoother than the ngk's I had before...  :undecided:

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: Wayne on 11 September 2012, 08:44

I was recommended to use the NGK platinums on my vRS and they were fine.

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: irmscher on 12 September 2012, 23:38

Also happens with cheap coilpacks... seen it plenty of times on 225bhp BAM's which seem to blow coilpacks for fun!

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: james2 on 25 October 2012, 20:54

I dont like denso ik22 or nology silver. Denso ended up black as hell on the firing tip and nology looked new like they never been used, i think they were getting to hot. You cant beat ngk platinum PFR 6Q i think, there a perfect light brown color on the tip and performance is so much better than the other 2.  :cool:

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: Wazzzer on 30 October 2012, 15:41

I'm gonna try some copper ngk 7s in mine, not bothered about them not lasting as long at £8 a set lol

Title: Re: Denso AVOID Denso AVOID !!!!!!!
Post by: Dalo Harkin on 06 November 2012, 19:13

I have the IK22s and they have been awesome.