1995 GMC

Asked by Dec 16, 2017 at 09:53 PM about the GMC C/K 2500 Series

Question type: Maintenance & Repair

it's back firing losing power them picks back
up weird smell coming from exhaust that it
was cat so I took it off but stil doing same
thing

5 Answers

10,245

sounds like it's dumping fuel , see if the injectors are firing normal or if one is stuck open , the cat is probably ruined any way , who needs it ? It may be part of the inspection , I have a 94 with straight exhaust for 5 years and never had a problem in the vampire state

10,245

I have a muffler , that's it

thank you ill try that in the mourning i was sure it was the cat but since i pulled it of today it worse

i have another tbi so its worth trying

105

Did you ever check the distributor? Check the cap for cracks and burned out contacts under the cap. How does the rotor look. Is it green and full of of junk. Check to see if the distributor hold down is still tight. If it is loose you are going to have to re-time the engine. Pull the distributor see if any teeth are missing from the gear. Look for metal in your oil. How are the plugs and wires? Check them to. See if any are broken crack or just missing a plug. They do happen to fall out sometimes. Are the spark plug wire old? They might be shorting out on the block.

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