Just installed AFE CAI & NGK Iridium Plugs

H

husky62

New member
Whoooooaa is all I can say. When removed the old ones with 8600 miles on it, I found the weird 3 Denso on the right and 3 NGK on the left...WTF? :soapbox: To me just by setting the mixed plugs BS is enough to feel some gain, besides the plugs look burnt...specially the Densos.:confused:

The sound now during fast acceleration and high rpm's is just wonderful it sounds like a bigger or V8 engine I love it!! :bigok

The $$$$$$ It was worth it!! Took me to install the AFE CAI and change the plugs around two hours taking it easy......tomorrow oil & filter change.
 
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The sound now during fast acceleration and high rpm's is just wonderful it sounds like a bigger or V8 engine I love it!!
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Sparkplugs only ignite the cylinder after the compression stroke. These either do or don't -- sort of digital in analogy. There is no better or worse involved.

The Denso and NGK plugs are equivalent and both good plugs.

If you think the Denso plugs didn't look proper you should see your dealer.
 
jeober said:
Sparkplugs only ignite the cylinder after the compression stroke. These either do or don't -- sort of digital in analogy. There is no better or worse involved.

The Denso and NGK plugs are equivalent and both good plugs.

If you think the Denso plugs didn't look proper you should see your dealer.
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Not only that the Denso plugs did not look proper but also I was experiencing rough idle when starting cold? Actually like only 5 cilinders were working when when away after warming up.:confused:
 
Jacobzky said:
if i may ask, what prompted you to change your spark plugs a little too soon?
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I was experiencing rough idle when starting cold besides the idea of having 3 denso and 3 ngk (different plugs on each side) do not appeal to me at all. I am an ex-USAF jet engine mechanic & Aeronautical Engineer with 22 years of experience and I think that formula is just plain wrong. Is like installing different igniters (that's how the plugs are called) on an aircraft is just plain CRAZY!!:bash:
 
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Is like installing different igniters (that's how the plugs are called) on an aircraft is just plain CRAZY!!
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If your igniters are of the same design and meet the same specs then these can be used interchangeably. To say not is to say that the vendors are producing different parts.
 
jeober,
Please allow me to disagree with you as every manufacturer use different materials and proportions, the specifications have a + /- tolerance range always and if it is between range is OK even though is not 100% accurate. The ISO-QA auditing & procedures management even under same parameters & regulations by the following societies to name few; ANSI, ASME, ASQ, ASTM, ISO9000 - ISO9002, etc, are proprietary of each individual factory and/or manufacturer. Therefore always would be a slight difference but "between specs". Reason why utilizing different spark plugs and brands is not a standard practice in the industry don't you think? Besides the rough idle and tardiness responding to the pedal on my truck is gone...so definitely something was wrong there!!:bugeye
 
I've worked 30 years as an automotive engineer.

Toyota dual sources the OEM spark plugs, putting NGK on one side and Denso on the other. Each plug meets the same performance and is manufactured under the same quality standards. There are no practical differences as far as Toyota is concerned.

If you still disagree I suggest you write Toyota and tell them that they can improve quality by using one manufacturer of plugs. You could even suggest the plugs that you found to make the V-6 sound like a big V-8.
 
jeober said:
I've worked 30 years as an automotive engineer.

Toyota dual sources the OEM spark plugs, putting NGK on one side and Denso on the other. Each plug meets the same performance and is manufactured under the same quality standards. There are no practical differences as far as Toyota is concerned.

If you still disagree I suggest you write Toyota and tell them that they can improve quality by using one manufacturer of plugs. You could even suggest the plugs that you found to make the V-6 sound like a big V-8.
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What I can do and actually I did was replace all the plugs with the best ones available, no need to speak with Toyota the truck is now mine. I think you are missing information on my thread, what it makes the engine sound better is an brand spanking new "AFE Cold Air Intake" installed together with the new plugs nothing less!!:D

I have the right to disagree as well as you do, so please let me utilize my right.
`
 
OUTRNNR said:
FWIW, I noticed a small difference in sound and performance when I installed my NGK Iridium IX plugs...:D
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Could be posible as you have full spark therefore better combustion.
 
IMHO, you wasted your money.

The OE plugs should have done fine duty for 30K miles. The Iridium plugs you installed (assuming the heat range is correct) should now last for ~ 120 K miles!

4Runners have been delivered with Denso and NGK plugs in V6 opposite cylinder banks for at least a decade! IMHO, any 'perceived' performance improvement is just wishful thinking.

Suggestion: for the next 100K miles, resist the impulse to replace engineer-specified OEM parts with aftermarket (i.e., dubious quality) parts, and enjoy your nice ride.

Regards.
 
khaug said:
IMHO, you wasted your money.

The OE plugs should have done fine duty for 30K miles. The Iridium plugs you installed (assuming the heat range is correct) should now last for ~ 120 K miles!

4Runners have been delivered with Denso and NGK plugs in V6 opposite cylinder banks for at least a decade! IMHO, any 'perceived' performance improvement is just wishful thinking.

Suggestion: for the next 100K miles, resist the impulse to replace engineer-specified OEM parts with aftermarket (i.e., dubious quality) parts, and enjoy your nice ride.

Regards.
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I understand your point but mixed spark plugs have nothing to do with engineering!! I feel better now that I know all the plugs are the same and NGK's which is Toyota choice too.
 
AFE CAI too noisy for my taste. I will close the front scoop or additional admission hole not found on TRD CAI (manufactured by AFE also), and check noise level then.

I like the sound all around until WOT.........is freaking noisy. But should be resolved by closing the additional port as people with TRD CAI has not reported excessive noise.:confused:

TRD CAI owners please advice?:awais:
 
could you post a picture of your engine bay witht he AFE intake?

At wide open throttle, that is expected, reverberating growl, which is normal. Ill try if i can get a sound clip of my truck at wot.
 
Jacobzky said:
could you post a picture of your engine bay witht he AFE intake?

At wide open throttle, that is expected, reverberating growl, which is normal. Ill try if i can get a sound clip of my truck at wot.
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I will do that after sealing the front scoop and installing a better isolation or tube to go inside the fender well like the OEM does for a real cold air intake.....:D
 
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