Could the plug on the left be causing occasional hesitation? Other two look like the one on the right. 45,000 on them.

 

From what I can see on my cell phone the plug on the left is not in good shape that could be a cause if its not firing right

 

Exactly right man..Looks like he might have ignition issue..

 

just get a new fresh set of NGK coppers and youl be good make sure you space em

 

Ya, the 1 on the left is done! Get some fresh plugs in there.

 

Thanks guys, pick some up Friday, any one know the # for the NGK copper stock heat rang offhand?

 

NGK BPR7ES (5534) gapped to .026 and you'll be off and running. Good luck.

 

getting alot of knock?

 

I'm pretty sure those are not BPR7ES's...it should say on them what the model is so it depends on what you want to run. Most people replace the coppers quite often.

 

Cars a IX, NGK LFR7A-11 for the copper? Not sure how much knock, can't log anything my lap top is down. No CEL, but not sure if this was disabled when tuned. Hesitation has happened mostly when just cruising at 60-65, only once so far under acceleration, seems to be happening more often.

 

5534s are the BPR7ES. The model number used to be 2023. Since you have a IX which was not stated in your original post prior to the reply, these will not work. These are for an VIII. NGK's website only shows the Iridium plug as replacement for the Evo IX. Countless threads here on EvoM state to use the factory Iridium plugs in the IX, unless you are making way more power than stock. Just search "plugs for IX" and enjoy reading.

 

Yeah sorry., I should have posted it was a IX when I asked for a copper plug #, and I have been researching sir.

 

Did it fix the problem? I seen your other thread and posted in there...just wondering!

 

Won't know till Sat., didn't have stock NGK ILFR7H in stock close to me, but they will have for me Sat. 8:00 AM. Picked up some NGK LFR6A-11, might try them.

 

there are no copper plugs for the 9. get the ngk ilfr7h plugs and gap them to .022-.024 and you should be ready to go