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Slow to start

Tiny
GRSUNG
  • MEMBER
  • 2003 LEXUS LS 430
  • V8
  • 120,000 MILES
It is okay to start the engine after it has been turned off for eight hours or more. It needs to be crank a couple of times after the engine is turned off for two to three hours. Also, check engine light and VSC light are on. Please advice. According to one of the mechanics, leaks were fixed. New gas cap was replaced. He said manifold needed to be checked :one by one? I do not understand what that means.
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Thursday, January 4th, 2018 AT 7:31 PM

7 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi GRSUNG,

Since the check engine light is on, that means trouble codes are present and in order to understand the problem, we need to know the exact diagnostic trouble code (DTC).

Get the code and let us know what it is, it could be more than one.
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Saturday, January 6th, 2018 AT 12:27 AM
Tiny
GRSUNG
  • MEMBER
  • 4 POSTS
I took it to AutoZone. The diagnostic code is P0446, indicating a fault in the Evaporative Emission System Vent Control electrical circuit for a predetermined period of time. Is it indicating problems with manifold?
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Monday, January 8th, 2018 AT 9:05 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
No, this usually is due to a broken wire of the EVAP solenoid. However to confirm the actual cause you need to have the wiring checked. It could also be due to a faulty or sticking EVAP solenoid.
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Wednesday, January 10th, 2018 AT 7:06 AM
Tiny
GRSUNG
  • MEMBER
  • 4 POSTS
The problem started off with loosing power. The dealer replaced the throttle. It took them more than 2 weeks to get the part. A few days later, engine and VSC lights came on. Dealer replaced gas cap and claimed that the leak was fixed. They said if the lights came on again, they needed 4-6 hours to check manifold, quoting me $800. Where is EVAP solenoid located if I check it myself.
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Wednesday, January 10th, 2018 AT 9:01 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Hello,

This guide will give you an idea of what you are in for when replacing the EVAP solenoid.

https://www.2carpros.com/articles/evap-system-code-repair

Here are diagrams to help you do the job on your car (below)

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
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Friday, January 12th, 2018 AT 3:03 PM
Tiny
GRSUNG
  • MEMBER
  • 4 POSTS
Please recommend a trustworthy shop/mechanic. I have a hard time tracing the leak. A mechanic told me that he needed to do smoke test in order to locate the leak. Please advise/help. My zip code is 77079.
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Tuesday, January 30th, 2018 AT 12:06 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
The best thing to do is do a search in your area and check out the Google or Yelp reviews.

Please let us know what they find. We are interested to see what it is.

Cheers, Ken
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Tuesday, January 30th, 2018 AT 10:41 AM

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