Question about 1999 Lexus LS 400
Just change 4 coil and still have 4 old was that was misfireing gonna get new ones in next week but I noticed that the car runs good but when I come to a stop idle lower and feels like its about too shut off pls help what else could it be besides chaning all coil pacts did the spark plugs already
Bad wires,IAC sensor,dirty throttle body.Next could be TPS sensor[RPM].
Posted on May 22, 2013
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Posted on Jan 02, 2017
Check air intake tempture sensor and engine control tempture sensor both will cause this problem don't rule out MAF but before u do any thing check for codes most lexuse will give u a code which is very helpful
Posted on Feb 15, 2013
#4 Miss-fire. All the things you are saying make a lot of sense. When the light is blinking the cylinder is actualy misfiring, & the smell you are smelling is the fuel that is not burning in the engine burning in the exahst. This can cause a lot of damage to the exausht if it is not repaired..
There is still a couple of things that need to be checked, first he needs to check to see if it is possibly a fuel injector that is sticking. He can do this easily by moving the #4 injector to another cylinder & run the car. When it starts missfiring he will need to see if it is still #4 or if it is the cylinder that he moved the injector to. if it is the new cylinder it is obviously the injector, if it is still #4 he will need to look into the possibility of the EGR valve sticking open or some other issue to do with valve timing or low compression.
I hope this helps
Posted on Mar 17, 2009
the front bank is bank 2, the rear one is bank one. The cylinders go from the timing belt side to the right. So 3 is the middle on the back bank, and four is the middle cylinder on the front bank. They are both in the middle so just replace them.
Posted on Aug 26, 2009
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