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Smog Test Emission Failure?

Tiny
JACOBANDNICKOLAS
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Hi:

No problem whatsoever. Take your time. Let me know what you find when you can.

Take care,

Joe
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Friday, April 26th, 2024 AT 8:18 PM
Tiny
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Hi Joe, That does not look like the one I have. The one I have fits 1995 Blazer up to 2005. The timing chain cover is plastic.
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Saturday, April 27th, 2024 AT 12:13 AM
Tiny
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Hi:

They likely used the pic I attached as an example. Take a look at the one I attached below. It is for the same engine. The picture is from the directions to replace the timing chain.

Let me know your thoughts.

Joe

See pic below
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Saturday, April 27th, 2024 AT 8:42 PM
Tiny
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Hi Joe,
Yes, that is a picture of the one I have and that's the TDC mark. But there is only one mark so why would the original dampener have two? Everything I have read says the one I have is the correct one, but I don't understand how it could be correct when the original one I replaced had two marks. I'm getting desperate here because I can't find the timing mark when it is running. I don't know what to do at this point. Thanks for your help.
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Sunday, April 28th, 2024 AT 2:01 PM
Tiny
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Hi:

I'm not sure why the OEM had two marks. That is odd. However, the new one's mark has to be the correct mark otherwise you would never be able to get it in time.

Have you tried taking a sharpie marker and highlighting the timing mark on the pulley? I always have to do that to see it.

Let me know.

Joe
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Sunday, April 28th, 2024 AT 7:00 PM
Tiny
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HI Joe, I just replaced the starter today because the drive gear broke. It was cracked in two pieces.
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Wednesday, May 1st, 2024 AT 2:56 PM
Tiny
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Hi:

Good Lord, you aren't having much luck. Have you been able to check the timing?

Let me know.

Joe
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Wednesday, May 1st, 2024 AT 7:55 PM
Tiny
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Hi Joe,
Guess what? I found the timing mark and I was able to time it correctly. If I didn't have to take the starter out, I would not have been able to see the mark. So now that problem is fixed, but there is a code for EGR failure. You are right, I am not having much luck, but I'm close. I will let you know what happens with the EGR. You've been great. Hope my luck changes. Thanks.
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Thursday, May 2nd, 2024 AT 12:43 AM
Tiny
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Hi:

That's good news. What code do you have related to the EGR? If you remove it, check for carbon in the valve and the intake to make sure there isn't a restriction.

Let me know.

Joe
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Thursday, May 2nd, 2024 AT 7:21 PM
Tiny
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Hi Joe,

Code 32 is the one that came up with the EGR valve. I tried cleaning it because it did have a lot of carbon, but it still did not look right, so I replaced it. It runs like crap. It idles really rough especially below 20 mph, once it gets above 20 or 30 mph, it drives ok. The new EGR did not help. In fact, another code 44 came up and that code is for a lean condition. If you can suggest what I need to check I will appreciate it. I'm going to check the fuel pressure right now and I will get back to you.
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Saturday, May 4th, 2024 AT 9:15 AM
Tiny
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Hi:

If you have a lean mixture, that is usually either the result of low fuel pressure or a vacuum leak. Have you checked both?

Let me know. Here is a link that explains how to check for a leak. I'm not sure if I sent it to you or not.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Also, the code, 44, may be related to a problem with the oxygen sensor. If you clear the code, see if it comes back. However, I have a feeling it is a vacuum leak. That often causes a rough idle.

Let me know.

Joe
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Sunday, May 5th, 2024 AT 5:48 PM
Tiny
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The PCV valve was dirty. I replaced it now it's good. There were big chunks of carbon 3 of them. Now it runs fine. Going to get the smog rechecked on Monday.
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Thursday, May 9th, 2024 AT 4:50 PM
Tiny
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Hi:

Wow, thanks for the update. I'm glad to know you were able to resolve the issue.

Take care and feel free to come back anytime in the future.

Joe
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Thursday, May 9th, 2024 AT 7:55 PM
Tiny
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Thank you Joe for hanging in there with me. I appreciate your time spent helping me.
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Friday, May 10th, 2024 AT 7:11 AM
Tiny
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Hi:

No problem whatsoever. That's why I'm here. LOL

Again, feel free to come back anytime in the future.

Take care,

Joe
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Friday, May 10th, 2024 AT 7:36 PM

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