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Rx300 what fix for burnt valve on #6 cyl - 2001 Lexus ES 300

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SOURCE: 99 lexus rx300 has engine miss on cyl 2,4,6 all

2-4-6 could be a fuel or ignition issue, hopefully not a valve. If you have the engine tested at the dealership they will attach a code reader under dash to analize and this should help pinpoint the problem.

Posted on Jan 10, 2010

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1 Answer

Why is there a miss in cyl. 1 that only occurs at idle speed, which seems low (750 rpm)?


Bad head gasket, burnt/stuck valve, or bad piston rings. Do a compression test. None are worth fixing in a high mileage car. It only creates other problem.

Apr 05, 2016 | 1999 Plymouth Breeze

1 Answer

How to fix code P0306 cylinder 6 misfire?


Swap spark plug with cylinder 4. Swap COP (coil over plug) with cylinder 2.
If problem moves to cyl 4, bad spark plug.
If problem moves to cyl 2, bad COP.
If problem remains in cyl 6, suspect valve or piston problem.
Start with compression check

Aug 27, 2014 | 1999 Ford Crown Victoria

1 Answer

What to do when there no psi on cyl 4 to get the psi up agan"?"


There are at least three possible reasons for no psi in cyl No 4.
1. Burnt or damaged exhaust valve in that cylinder
FIX Remove head and replace faulty valve
2. Blown head gasket (water mixed with sump oil shows milky on dipstick and steam or water coming out of exhaust tailpipe, radiator water disappears )
FIX Remove head, grind flat and assemble with new gasket.
3. Broken piston rings, or cracked piston or burnt hole in piston.
FIX replace faulty parts.
Squirt some sump oil ( 2 or 3 spoonfuls ) through spark plug hole,
spin motor , and if compression PSI improves then it is rings or piston, if no PSI then it is faulty ex valve !!!

Jun 26, 2014 | 2003 Mitsubishi Lancer

1 Answer

Nissan 2004 6 cyl. noise in engine when starting and driving


The statement is really vague. What kind of noise? It could be a wide range of possibilities from a dry motor, lifters to bent valves to pistons to burnt out a/c compressor to bad water pump impeller to bad pulley bearings... loose exhaust manifold cover...

Aug 29, 2011 | 2004 Nissan Altima

2 Answers

My buick running on only 4 of 6 cyl. i replaced all the coil packs, plugs, plug wires, and the coil mod and it still has not fix the problem any ideas would help.


replace your distributor. if you already replaced the wires and the plugs and still the 2 cylinders do not work then the only remaining part to replace is the distributor itself.

Aug 06, 2011 | 1995 Buick LeSabre

1 Answer

99 lexus rx300 has engine miss on cyl 2,4,6 all


2-4-6 could be a fuel or ignition issue, hopefully not a valve. If you have the engine tested at the dealership they will attach a code reader under dash to analize and this should help pinpoint the problem.

Jan 07, 2010 | 1999 Lexus RX 300

3 Answers

#6 cylinder misfire


Could be a valve seat burnt, check compression, if lower than the rest, probably that or a head gasket leak next to #6.
Borrow or buy a compression tester or get a garage to test for you.
To fix you will have to determain wether the valve can be ground back in or a new seat is required, but either way, as it's a big job, get all the valves done as if one has gone, how long before more go?

Jul 12, 2009 | 1999 Chevrolet Tahoe

1 Answer

Two front cylinders are low


If your going to chg. head gasget, as long as you got the head off you would be smart to have a valve job done too. That could be why you lost compression in the 2 cyls. burnt valves will cause loss of compression. But take note if you elect to have a valve job done you also run the risk of it to start useing oil because of the increase in compression on the oil rings with that many miles it can happen.

Mar 19, 2009 | 1991 Jeep Wrangler

1 Answer

Need ignition removed from 01 lexus RX300


Remove plastic covers from steering column area. Insert key into ign. turn to acc. use pick to push in pin on bottom of ign cyl. pull out cyl.

Feb 22, 2009 | 2001 Lexus RX 300

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