Misfire
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I have a 99 rx. I am getting a miss fire code from the computer. I have had the car looked at by first a local mechanic and then a specialist. The mechanic replaced th spark plugs. The specialist replace the VVT (silenoid?). And the miss fire continues,CAN ANYONE HELP.
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#2
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The misfire is usually related to the ignition coil, not the spark plug or solenoid, god knows how they came to the solenoid
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The ignition coil sits on top of the spark plug.
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In the photo below are the tops of the 3 ignition coils on the front bank (there are 3 on the rear on the back of the engine). These are really easy to to remove and put back in (just a 10mm wrench unscrews the bolt that holds it in).
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Hi..
I recently replaced all 6 spark plugs, among tons of other things. My latest code is p1354 VVT Random misfire. and p0302 p0304 p0306 I feel it is improbable for three coils to go out at once. My ocv is clean, my engine has no sludge. Recently, I've replaced MAF 2 o2 sensors 2 knock sensors 2 injectors and the plugs. Every time I fix one code another pops up. NIGHTMARE! My car has had the timing belt replaced 25,000 miles ago. I'm so stumped!
Another tidbit..once I clear the code, the car runs beautifully, until that MIL comes back on...then the car runs rough and jerks and hestitates. Does that sound like a gremlin in the ECM? Camshaft position sensor? I'm grabbing at straws here.
I recently replaced all 6 spark plugs, among tons of other things. My latest code is p1354 VVT Random misfire. and p0302 p0304 p0306 I feel it is improbable for three coils to go out at once. My ocv is clean, my engine has no sludge. Recently, I've replaced MAF 2 o2 sensors 2 knock sensors 2 injectors and the plugs. Every time I fix one code another pops up. NIGHTMARE! My car has had the timing belt replaced 25,000 miles ago. I'm so stumped!
Another tidbit..once I clear the code, the car runs beautifully, until that MIL comes back on...then the car runs rough and jerks and hestitates. Does that sound like a gremlin in the ECM? Camshaft position sensor? I'm grabbing at straws here.
#5
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Yes, highly unlikely that all 3 coils would go bad at once. I had 5 bad coil codes on one occasion so I bit the bullet and took it to the dealer. Only one coil was bad. Having said that, a bad coil doesn't go away when you re-set the code so something else is causing the misfire. Check this out:
http://us.lexusownersclub.com/forums...howtopic=44742
http://us.lexusownersclub.com/forums...howtopic=44742
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