wan8dan

96 Lexus ES300
sometimes (especially when car left un-driven more than two days) get low idle
speed (less than 100 rpm) at cold engine start, have to step on gas pedal
slightly to keep it running. But a minute or so, idle goes back to normal.
Sometimes I also get high idle speed at cold start(ie: more than 1500 rpm).
I've cleaned intake throttle, idle air control valve, and MAF sensor about 9k
miles ago, but problem still persisted. Not sure if this is indication that
idle air control valve or throttle position sensor is going bad. Any advice
would be appreciated.

Hi,

Thanks for posting the starter fix.

I have same problem with my 96 ES300 and hate to throw away $500 when there is easier fix.

Kindly send me the pics, part #...etc.

Thank you very much

Simon

I have ES300-96'. I thoroughly cleaned the idle air control valve and air intake
throttle, idle problem gone, but 2k miles later, low-to-no idle problem
re-surfaced when I start the engine. What else could cause it that I haven't
looked at?

Thanks

Simon

Hi LexusClub members,

I changed spark plugs for the 1996 ES300. It was a lot of effort as the 4, 5, 6th spark plug valves are hidden under the main air manifold and required taking them out to reach for these spark plugs.

Strangely, I realized these 4, 5, 6th spark plugs do not have spark plug coils on them and there are no electrical wiring for the coils either. But the 1st three spark plugs in the front do have coils and the spark plug cables are connecting directly to the 4, 5, 6th spark plugs.

Is this normal as expected?

Thanks