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EGR/misfire issue

Tiny
STEVE W.
  • MECHANIC
  • 13,573 POSTS
Yep, good stuff. The smoking is normal, it is the cleaner and carbon burning off. Clear the codes and see which ones come back.
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Wednesday, March 28th, 2018 AT 9:11 AM
Tiny
TMINER
  • MEMBER
  • 49 POSTS
I just saw that I should possibly try to put something into the engine ports where the EGR bolts onto to make sure it isn't clogged. Is this true?
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Wednesday, March 28th, 2018 AT 11:17 AM
Tiny
ASEMASTER6371
  • MECHANIC
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What I do is with the valve removed, I start the engine. You should have a large exhaust leak and also a vacuum leak. The engine may stall or run rough. That will tell if you have signals to the EGR

Roy
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Wednesday, March 28th, 2018 AT 11:22 AM
Tiny
TMINER
  • MEMBER
  • 49 POSTS
If the engine runs normal and correct with it off, EGR is bad?
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Wednesday, March 28th, 2018 AT 11:25 AM
Tiny
ASEMASTER6371
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No, the passages are blocked.

Roy
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Wednesday, March 28th, 2018 AT 11:27 AM
Tiny
TMINER
  • MEMBER
  • 49 POSTS
I just took it off and three times the engine immediately shut off. The ports in the engine look completely solid. Am I to assume the port holes go off to the side?
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Wednesday, March 28th, 2018 AT 11:37 AM
Tiny
ASEMASTER6371
  • MECHANIC
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Did you have a good exhaust leak when you pulled it off?
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Wednesday, March 28th, 2018 AT 12:07 PM
Tiny
TMINER
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  • 49 POSTS
I cannot tell. The engine shuts off so fast. Should I run the truck to running temperature first then remove it and restart?
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Wednesday, March 28th, 2018 AT 12:09 PM
Tiny
ASEMASTER6371
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You should hear a loud exhaust. If you remove the valve, it should have a large exhaust leak.

Roy
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Wednesday, March 28th, 2018 AT 12:15 PM
Tiny
TMINER
  • MEMBER
  • 49 POSTS
It was loudly sucking yes.
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Wednesday, March 28th, 2018 AT 12:42 PM
Tiny
ASEMASTER6371
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Loudly sucking is the vacuum. The exhaust would sound like you had no exhaust on the car.

Roy
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Wednesday, March 28th, 2018 AT 12:44 PM
Tiny
TMINER
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  • 49 POSTS
The engine was not louder than normal, I do not think no.
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Wednesday, March 28th, 2018 AT 12:48 PM
Tiny
ASEMASTER6371
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Okay, then you have a clogged exhaust port to the EGR valve. Without that exhaust the valve cannot work.

Roy
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Wednesday, March 28th, 2018 AT 12:56 PM
Tiny
TMINER
  • MEMBER
  • 49 POSTS
How do I clean it? Maybe a bent wire brush into the port from the throttle body side or from the EGR side?
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Wednesday, March 28th, 2018 AT 12:58 PM
Tiny
ASEMASTER6371
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There is an exhaust tube from the manifold that goes to the valve. That is the port that needs to be cleaned out.

Roy
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Wednesday, March 28th, 2018 AT 1:01 PM
Tiny
TMINER
  • MEMBER
  • 49 POSTS
Can I get to it from the EGR ports on the engine and do I have to snake a cable into it to "drill/ream" it out? Thanks.
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Wednesday, March 28th, 2018 AT 1:04 PM
Tiny
ASEMASTER6371
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Yes, once you remove the EGR then you need to clean the passage to the exhaust manifold from the EGR port.

Can you post a picture of what you see?

Roy
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Wednesday, March 28th, 2018 AT 1:08 PM
Tiny
TMINER
  • MEMBER
  • 49 POSTS
Here is the EGR ports. Which hole do I clean out with a cable, etc? I cannot see the hole in the throttle body yet. Is a speedometer cable best to use in a drill?
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Wednesday, March 28th, 2018 AT 4:54 PM
Tiny
ASEMASTER6371
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Both holes, they are completely clogged.

Roy
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Wednesday, March 28th, 2018 AT 10:59 PM
Tiny
TMINER
  • MEMBER
  • 49 POSTS
I've done some "drilling" with a speedometer cable on both sides but when running truck with no EGR it will run rough like it's going to die then come up in rpm and keep cycling like that. It does seem slightly louder now but I think there's still gunk in both the intake and exhaust valve of the engine EGR ports. I may need some more tips to get the carbon out. I still can't see where the carbon is in throttle body.
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Thursday, March 29th, 2018 AT 2:01 PM

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