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1993 GMC Sonoma catalic convertor

Tiny
TONIO1726
  • MEMBER
  • 1993 GMC SONOMA
Engine Performance problem
1993 GMC Sonoma 6 cyl Four Wheel Drive

My engine doesn't stay on and I notice my catalic convertor is gettin super hot. I just replaced spark plugs fuel filter and the fuel pressure regulator. I don't know what is makin my cat gettin too hot and it smells really bad.
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Saturday, October 16th, 2010 AT 10:23 PM

11 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Converter could be stopped up causing these issues or timing could even be off causing symptoms.
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Saturday, October 16th, 2010 AT 10:29 PM
Tiny
TONIO1726
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  • 6 POSTS
Could the coil or the distributor have anything to do with the problem?
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Saturday, October 16th, 2010 AT 10:34 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
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Possible but should throw the check engine light on
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Saturday, October 16th, 2010 AT 10:36 PM
Tiny
TONIO1726
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  • 6 POSTS
If I remove th e cat would that fix the problem?
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Saturday, October 16th, 2010 AT 10:37 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
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Removing converter is never a good thing to do because it will effect emissions as well as MPG of vehicle and will also make check engine light remain on. You wouldn't pass emission testing if required in your area with a removed converter.
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Saturday, October 16th, 2010 AT 10:39 PM
Tiny
TONIO1726
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  • 6 POSTS
By changing my cat would that fix my problem with the engine not staying on
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Sunday, October 17th, 2010 AT 1:04 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
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If the cat. Is indeed clogged then yes
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Sunday, October 17th, 2010 AT 6:53 PM
Tiny
TONIO1726
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I just changed the cat on my truck but its still not working right. It was a bad cat but it didn't solve the problem. Got any ideas on what could it be?
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Sunday, October 17th, 2010 AT 9:27 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
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Check compression in cylinders, timing may be off which would cause the cat. To get hot and engine to not run.
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Monday, October 18th, 2010 AT 3:34 PM
Tiny
TONIO1726
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  • 6 POSTS
How do I check compressionin the cylinders? Is it too hard to do? Would that fix the timing or do I need to get that checked out too
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Monday, October 18th, 2010 AT 9:59 PM
Tiny
BLUELIGHTNIN6
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It's not hard to do, you just need a compression gauge. if its low on all cylinders than it is a good indication that timing may be off. follow this link to learn how to check compression https://www.2carpros.com/dia/how_to_check_compression.htm
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Tuesday, October 19th, 2010 AT 8:15 PM

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