SPONSORED LINKS

2000 Lexus ES 300 Low RPM's at cold start

Tiny
KBIZZARRO
  • MEMBER
  • 2000 LEXUS ES 300
Engine Mechanical problem
2000 Lexus ES 300 6 cyl Front Wheel Drive Automatic 80.000 miles

I have been having trouble keeping my car running recently at initial cold starting. Initial RPM's aren't high enough to keep the motor running without hitting the gas to increase engine speed. Once it heats up a little, (about 30-45 seconds) the motor runs fine. I have a new air filter, I've cleaned the air intake butterflies. I've found no vacuum leaks. I've increased the set screw to increase idle RPM's a little, but the car still starts like it has an old style carburetorr that wouldn't close it's choke in cold weather. My initial computer scan came up with a P505 idle air/ speed control problem. I also noticed the throttle cable had a little slack in it, so I adjusted that. Can you suggest something else for me to check?
SPONSORED LINKS
Monday, October 6th, 2008 AT 8:49 AM

2 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Clean the idle air control valve and housing, if problem persists replace the IAC.

You should not adjust the idle screw, this is simply masking the problem and may cause the engine to run lean/rich once the real problem is fixed.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Monday, October 6th, 2008 AT 1:09 PM
Tiny
KBIZZARRO
  • MEMBER
  • 3 POSTS
I did as you suggested and cleaned the IAC which fixed the problem. Since I had previously increased the idle speed before cleaning, it was necessary to bring it back down to it's original position. Thank you.
Was this
answer
helpful?
Yes
No
Wednesday, October 8th, 2008 AT 8:44 AM

Please login or register to post a reply.

Related Engine Revs Up Content

Idle Air Control Motor Replacement
GUIDE
Idle Air Control Motor Replacement
The idle air control motor or idle speed control motor is designed to adjust the air flow into the intake manifold at engine idle. Engine idle speed is monitored by the PCM...
VIEW MORE

Sponsored links