Y34 New Spark Plugs and question for manifold cleaning???

[DRIPS]

Well I just installed new spark plugs in my Isabelle. I went for 8 NGK LASER PLATINUM SPARK PLUGS item number PLFR5A-11 6240! These are the stock plugs. I grabbed them new off ebay for 44 bucks shipped for all 8. Great deal!

The install was straight forward on the passenger side of the motor. The drivers side bank required me to release two hose clamps to remove the intake flex tube. Then I disconnected all of the connectors. That gave me enough room to get the tools in there and complete the job.

Took more time than you would think since you need to finagle around everything for some tight ones.

I would estimate about an hour or just over for the whole job.

The car has 80000 on it. The plugs that were there looked like they needed the replacing. I assume they were originals.

Finally, while i had the flex tube off I noticed the intake manifold was pretty built up with grime. What can I spray drirectly into the intake through the "flappy thing" as my girlfriend says???

Any ideas?

[kamezzle13]

i would think that something like throttle body cleaner would be fine to use. or even engine degreaser.

[thomasm35]

Great plugs & price ! I used 3 sets of the NGK platinums in my Toyota's (93k,92K & 89K - the recomanded interval was 90K). They looked clean and looked like they could go another 90K.

Try some Gumout or even WD40 on the manifold cleaning.

[DRIPS]

do I just spray it right in there? WHat are the consequences of freeing up all that grime inside the manifold? Id rather not pull the manifold off to do this

[CanuckQx4]

Anychance you know what seller had those plugs that cheap?? I need them and thats a LOT cheaper than Im finding

[M45Caliber]

I replaced the plugs in my Y34 at 50K (with KenAZ's help… I bought the beer and he wrenched) We used the NGK Iridium plugs as recommended by a Nissan tuner. eBay and $58 shipped. The old plugs, at 50K looked worn out. Performance with the new ones (10K miles on them now) has been great. Those and the 2 degree advance bumped my fuel mileage by about 8% to 10% (I have a pic of the gas mileage history screen, with the first 5 showing before, and the following 5 bars showing after). It's quite a measurable difference. It's also much more "lively" to drive now.

CAREFUL on spraying anything INTO the intake manifold -- I'm assuming you are considering pulling the plastic air filter tube and spraying something in there to clean it out? Talk with an Infiniti tech first, as there have been tons of posts on this board about damage done to MAF's and TB plates, etc. ALSO -- you should have done the cleaning BEFORE changing the plugs, as whatever you spray in there now your new plugs will have to burn off.

do I just spray it right in there? WHat are the consequences of freeing up all that grime inside the manifold? Id rather not pull the manifold off to do this