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1JZ VVT-i running problems...

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Old Nov 9, 2012 | 04:34 PM
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Default 1JZ VVT-i running problems...

Hi peeps,

So just yesterday I noticed a bit of a problem with my car...
Ever since I have bought it (~4 months ago), the car has had a little pop in the exhaust on idle - it was hardly worth paying attention to so I ignored it.
But now I have noticed when I push the pedal to the metal in second gear, when it gets to around 6000rpm (-ish; maybe a bit less), the exhaust starts to pop, and I lose some power. Imaging wringing some bubble wrap, that's how close together the pops are sounding.

Now I haven't tried to diagnose myself yet, but my first thought was to spark plugs, because I haven't changed them while the car has been in my possession, and before that the car was driven less than 10 times in 2 years.

As of right now, the car only has a 3 inch turbo back, but is otherwise stock (engine-wise).

I'ma try that first, but if any of you have any suggestions, just yell out.

Peace out.
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Old Nov 9, 2012 | 04:48 PM
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https://www.clublexus.com/forums/sc-...d-and-and.html

Help us help you.
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Old Nov 9, 2012 | 05:15 PM
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Thanks for the move - bit of a noob mistake.
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Old Nov 16, 2012 | 10:01 AM
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Whats up Hexxle - I made the same mistake -
I would definitly check the plugs first. Also check the coil packs for cracks. If your coil packs and plugs are good, then maybe you have a Boost leak. Is your check engine light on?
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Old Nov 16, 2012 | 10:15 AM
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well the vvti coils are less prone to cracking, but have a look and change the plugs out while you are in there.
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Old Nov 17, 2012 | 05:27 PM
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well mine would kinda miss at full throttle at higher rpm. I changed plugs and its all good now. I would start there and make sure there is some good gas in there
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Old Nov 17, 2012 | 10:21 PM
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That "pop" sounds like what my 1j VVTi was doing when I had a minor ignition misfire at idle. I replaced the plugs with OE twin ground electrode type and new boots/wires, problem solved.
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