GS300 NEEDLE OF RPM VIBRATE & ENGINE SHAKE

2002 Lexus GS 300

Tiny

adnan

May, 13, 2011 AT 1:51 PM

I have Lexus GS300 2002 model. There are two complaints.
1) The Engine runs smooth in Idling for some time & suddenly the needle of RPM vbecome not constant and the engine shakes.
2) When you accelerate uniformly the engine vibrates a lot. But in case fast acceleration no problem.

i found alittle oil in the injecetor so I repleced oil seal but the problem still.
computer check said(cylinder3 & cylinder5 defect)
Checked the vacuum pipes- found Ok
Replaced the HT cables.
Replaced the Spark plugs.
Check misfire coils. Found ok
Replaced fuel filter
Replaced oil seal of the injecoters

please help me.I spend alot money



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2 Answers

Tiny

fixitmr

May, 13, 2011 AT 6:33 PM

Did you clear TC's and recheck for codes after you applied fixes?

Tiny

fixitmr

May, 13, 2011 AT 7:22 PM

Another thing to check is your oil control valves the left 1 is the usual suspect. When dead it rise havoc with misfires. Cost about $100 get it at toyota and save some money.

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