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All idles problem and P0420 solved.

 
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Old 06-15-2011, 03:57 AM
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All idles problem and P0420 solved.

Hi guys,
Some of you might have read some of my threads about engine dying at stops and at quick turns (when clutch is depressed), cold start problems, car not idling, cat converter (CEL P0420). I have had these problems for several months. I was going to buy a new cat and a bunch of other stuff to fix the idle problems. I thought I needed to replace the IAC valve and the MAP sensor and many other things. Then one day I realized my car was losing a lot of coolant, and the reason was one of the coolant hoses was leaking. I fixed the coolant leak. Now all the problems are gone. The car idles fine when cold started, no more CEL for cat converter, and the car doesn't die at stops or when the clutch is depressed anymore. So I assume that because of the lack of coolant, the IAC valve wasn't working properly, which caused all the idle problems and also messed with the air-fuel ratio, which caused the P0420 code. Never thought coolant could cause so much trouble. I am so happy that my car is back to normal now.
Thanks for reading guys, and my Lude is a '99 base.
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Old 06-15-2011, 12:43 PM
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Re: All idles problem and P0420 solved.

if you had even searched for "idle problem", you woulda saw this thread:
the FINAL idle problem thread!!!!!

which has the first step as...... checking your coolant levellll!!! which prolly woulda saved you a thousanddd headaches!


but glad to hear its resolved
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Old 06-15-2011, 02:51 PM
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Re: All idles problem and P0420 solved.

I actually read that thread a long time ago and I might have forgotten some of the important stuff. :D I did bleed the coolant, and my idle wasn't fluctuating. It is kinda rough in the morning, then after a few minutes, it is fine. But when I start driving the car, it will occasionally die.
Thanks for the reply
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