Jump to content

Loud backfire blown muffler now wont run

Longshots

Recommended Posts

Longshots New Member

Longshots

Posted
Posted

I have a 95 GMC Suburban 120000 miles last night it hesitated twice then Backfired very loud and died. I looked under and saw the muffler blown open. It will start but when you apply gas it dies. under the hood there was a cable laying off that we reattached to the throtle arm? Still will start and idle but dies when you try to drive. Please help me narrow what it could be, I'm not much of a mechanic, but, can replace parts fairly well.

Longshots New Member

Longshots

Posted
  • Author
Posted

No, sorry, it is stranded at a friends house. It looked like a bike brake cable. It connected to a box against the firewall on the top of engine compartment drivers side.

 

Does that help?

Butch 02 Denali Enthusiast

Butch 02 Denali

Posted
Posted
I did reaatach it but it seems like it could come off again.

 

 

 

 

That is your cruise control cable.

 

I'd look for a cylinder not firing, bad coil or plug maybe. That will send the unburned gas/air charge into the exhaust, and the muffler is usually the weakest link when it blows!

Longshots New Member

Longshots

Posted
  • Author
Posted

Thanks for the reply, that makes sence on the cable. My cruise just stopped working the other day. Now maybe if I can get this other thing fixed it will work again as well. I will check the cylinders.

Stocklook Enthusiast

Stocklook

Posted
Posted

Check to see if you TP's are opening and the injecter's are in place, you could of had a back fire back thru the TB and bent the plates, Just my .02

 

Hope everything come out ok

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Atlas
      Gas Prices

      By Atlas · Posted

      Those can be high, as well as the big California cities. The ones that will pop your eyes out are the 395 corridor on the Eastern side of the Sierra Nevadas. Lee Vining, $7.19 for regular and $8.89 for diesel is what the Google said right now.
    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Correct.  2019-2021 model years are serviced by a different p/n.  19420611.  Recall 2021s use 19420611.   The recall engines 2022-2024 model years are serviced with 12740076.     The difference between 19420611 and 12740076 is GM changed injector size for 2022.  The injectors are smaller on 12740076 with smaller injector bores in the cylinder heads to match the smaller injectors.  So you can't install a 19420611 in a 2022-2024, and you can't install a 12740076 in a 2019-2021.     Both engines are the replacement engine p/ns that are in the L87 recall.  So both of these are the updated engines.     Here's a version of the L87 recall with the p/ns for all the parts needed.    RCRIT-25V274-7075.pdf   Note it shows 19420611 and 12740076 with an asterisk to a footnote "Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which part to order if two or more part numbers are listed for the same part, as it may vary by vehicle options."    
    • 2017Z
      2020 Trailboss 6.2 replacement

      By 2017Z · Posted

      Looking for advice from this group. Took my flawless 2020 6.2 TB to an unnamed shop for routine rear brakes and oil change. Tech forgot to put oil back in after the full service and needles to say, destroyed my engine.  It’s all on their shop video so they are responsible.   I had my Chevy dealer do the analysis and they confirmed its compromised and said engine replacement. The manager said they only get GM reman engines from GM with full 3 yr warranty and the one they would put in is not same as what’s they are swapping out on 21-25 for recall.    I am looking for advice why that would be a different engine because obviously I had the good 6.2 year and replacing it has my concerns with that recall for 21-15   Also what’s the pros and cons of accepting the engine swap vs telling the shop that bricked the truck to pay up so I buy a new truck. I’m concerned about stigma resale eventually if I just decide to get rid of it after the swap or other issues showing up after the swap out.  
    • GN2018
      AFM Disabler Question

      By GN2018 · Posted

      Just looked up my records.  I've never gone over 5000 miles between oil changes.  At 46K miles, I have 10 oil changes.  I hope that will help.  I also installed the disabler last year.  I've still had a few times when it didn't seem to engage (which I can tell because the start stop feature kicks in), but for the most part, I think it's working.  For some reason, GM did not include the number of cylinders running in the information screen like I had on other models.  In my Cadillac, it shows me when it's running on 4 cylinders on the fuel milage screen.  I can't find that on my '21 Denali.
    • davester
      Wiring Help, Please

      By davester · Posted

      you might read through the info on gmupfitter.com for your truck, to find a good power source.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...