1990 240sx Engine vibration problem.

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thekawaii
Posts: 1449
Joined: Sat Dec 11, 2004 11:29 pm
Car: box with 4 wheels
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1990 240sx 5 speed with 150k miles.

When the engine is cold, it runs smoothly. But when Engine gets hot, it starts vibrating violently at Idle.

Also noise comes from the hydraulic lifter. I did leak down test, result came out good.

New Fuel pump.Checked the injector connectors.Runs pretty good on highway.Kinda slower than other KA24E


MaximA32

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Have you ever cleaned your IAC/V? I would suggest doing that and see if it changes anything.

TokayanaWayIsHome
Posts: 12
Joined: Mon Jan 07, 2008 2:45 pm
Car: 1990 240sx
Contact:

Post

on my 240 it was my spark plug gap for the most part they were down around .026" i opened to .040" and she purrs now

thekawaii
Posts: 1449
Joined: Sat Dec 11, 2004 11:29 pm
Car: box with 4 wheels
Contact:

Post

Like you said, NGK recommended 0.44" on SOHC KA24.

I'll try those. Thank you guys for help.


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