samuelo

Thanks man

I ve opened the valve cover but there was no sludge.

I would pull the front valve cover and see if your engine has sludge....The variable valve timing may be off do to poor oil flow.

Dear code58

I see 2 valves on my right side back to back of eachother when the hood is open one in the back one in front the front one is the one what you are talking about right next to the battery? Thanks

On my 99 rx300 2wd i got 10 codes for ignition coil and bad spark plugs after i replaced all 6 coils and the spark plugs now i only get i code which is >>>>>1354 MANIFACTURE CONTROL IGNITION SYSTEM OR MISFIRE<<<<<<< i have no clue what this means and don't know what to do next i spent one whole day replacing those coils and spark plugs but the check engine light is still on. !!!!!!GOOD PEOPLE !!!!!! please help me to solve this problem possibly step by step. Regards ::cries: ( :(

Sam- Where did you get the the interpretation for the code: 1354? Like Lenore says, that code has to do with the VVT System Malfunction, Bank 2, which is the front bank, closest to you when you open the hood.

Dear Maistran

Thanks for the help but i do not see any pictures .Thanks

:)

I thought I would write a solution that worked for me. This relates to codes P1354 and P1349, related codes and symptoms.

Code P1354 VVI Malfunction Bank 2. Bank 2 is closest to the radiator. Often called the left side.

Resulting codes:

Code: P0300 - Multiple random misfires

Codes: P0302, P0304. P0306 - Cylinder misfire in cylinders 2, 4 and 6.

Possible code also- Code: 1153 - AF/ sensor bank 2 sensor 1

OR

Code P1349 VVI Malfunction Bank 1. Bank 1 the difficult side where the intake body is. Often called the right side.

Code: P0300 - Multiple random misfires

Codes: P0301, P0303. P0305 - Cylinder misfire in cylinders 1, 3 and 5.

Code for A/F sensor as well.

Driving symptoms:

The check engine light may come on periodically and go off after some driving. You may attribute it to a poorly closed gas cap ( may be the problem). You may not notice any significant performance issues.

At some point the idle may get rough due to the misfire, it may idle well when cold and become rough when warm. Ignore it and there may be a fish bite (jerk) at multiple speeds and revs. You may drive at a constant speed and the car cuts back and then revs up.

The brakes seem to become hard as well since insufficiently vacuum is created at idle.

Solution:

The code print out from from the ECM will suggest checking electrical connections, sludge etc.

The first thing is to panic, and think the coils may be the problem. If you car was running OK highly unlikely all three coils on one bank will suddenly develop go bad simultaneously. The code print out from from the ECM will suggest checking electrical connections, sludge etc.

If it is sludge that is causing the OCV to stick, then you have a bigger problem to address. Remove the valve covers to see if there is sludge.

You are luck if the electrical connections are a loose.

More then likely, it is the Oil Control Valve (OCV). Being VVT, the intake valves stroke is determined by engine RPM and load through the ECM and sensors. This in turn regulates the OCV allowing more or less oil through to control the intake valve stroke.

Replacing the OCV is an easy task. Start with taking of the plastic engine cover. I have attached some pictures.

To remove the OCV, remove any obstructing pipes if you have to (I did not).

Remove the electrical connector and 10mm head bolt.

Rotate it to break the O ring seal pull it out. You may need a flat end screwdriver to pry it under from underneath the flange.

Replace with a new one. Be careful not to mix the left and right sides. The one in the picture is bank 2, left.

This may not be the solution for everyone but it worked.

The OCV from the dealer is about $100 and 10 minutes to install. If you are close to http://www.twsparts.com/ they sell genuine Lexus parts ($80).

http://www.parkplacetexas.com/DealershipHo...?DealershipID=5 has them online cheaper but you have to pay shipping.

Hope this helps some out there.

Maistran.

On my 99 rx300 2wd i got 10 codes for ignition coil and bad spark plugs after i replaced all 6 coils and the spark plugs now i only get i code which is >>>>>1354 MANIFACTURE CONTROL IGNITION SYSTEM OR MISFIRE<<<<<<< i have no clue what this means and don't know what to do next i spent one whole day replacing those coils and spark plugs but the check engine light is still on. !!!!!!GOOD PEOPLE !!!!!! please help me to solve this problem possibly step by step. Regards ::cries: ( :(