Catalytic converter or fuel pump?

Tiny
KRISTINE TURNER
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 6 CYL
  • AUTOMATIC
  • 83,000 MILES
Ok. 1999 (I think) Blazer, 4 door, under 80,000 miles I am 2nd owner.
A couple months ago, my gas gauge started bouncing around, sometimes fast, other times slowly. I end up running it out of gas. Week or two later, mpg gets worse, truck starts lagging, slowly loosing power it normally has. It begins to act like its running out of gas all the time. I treat gas with high octane racing fuel type shit. Truck runs like before for a about a month. Then starts acting up again. It eventually looses all power, Im on the side of the road. Truck ran hot, but never registered on gauge. But I could smell it. It cools off, starts up and makes it home. I am thinking catalytic converter, loss of power, mpg gas, plus, it has been rattling up under there, and that steady got worse. Had oil changed and asked the guy, he said yes, thats what it is. What I didnt realize until just today, it quit on me while full of gas. I have drove it when it would make the 2 mile trip to the store until it is now under half a tank, I'm back to not having issues. But I can feel the heat coming up the floorboard, thats been happening for a while now. $485 to replace catalytic converter, I dont have that. Also, just an observation, when truck is running bad, my left turning signal blinks very fast, no issues, it blinks normally. (Really?) But the converter is going to steady get worse, right? Not fine a month, then bad again. The half tank gas issue got me thinking, could it be my fuel pump? I am a single unemployed mother of two and a full time student. I moved to a town I know nobody in, and the vultures smell all that. Im not an idiot. But I cant afford to pay a couple hundred dollars for them to tell me thats not the issue! I am 200 miles from guys I trust that could fix my truck. WHAT DO YOU THINK IT IS? Is my fuel pump in my gas tank? Mskris1234@yahoo. Com or 205-657-7530
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Saturday, August 27th, 2016 AT 2:28 AM

4 Replies

Tiny
KRISTINE TURNER
  • MEMBER
Since posting my issue I have done some researching. Daylight in like less than an hour, and while I wait for a reply from ya'll, I am going to go check out the condition of my air filter. I have put 20,000 miles on this truck since I bought it, and I know that filter has not been changed. Hope, and a prayer, that I might can fix this issue myself. Now wouldn't that just be dandy? Still, the rattle underneath, that needs to be explained. I have been reading reviews on my truck, it is a 1998 model. The broken seat handles, the ball joints, I have those issues, and the windshield wiper problem as well. And is my blinker warning me something is wrong? Guess I can google that. Cant wait to hear what you think. What somebody thinks, that isnt trying to charge me $250 just to test my fuel pump!
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Saturday, August 27th, 2016 AT 4:27 AM
Tiny
HMAC300
  • EXPERT
Dealers have a tool to put in O2 sensor to check for a converter, you can put a vacuum gauge on intake manifold and it may work. if it reads 15" or below then it's an exhaust problem if you hit converter and you hear it rattle it's probably no good. also auto parts rent pressure gauge you need 60-66 psi if it's a V6 or V8.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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+1
Saturday, August 27th, 2016 AT 6:10 AM
Tiny
KRISTINE TURNER
  • MEMBER
Air filter looks brand new. But I can hear my fuel pump when I remove gas cap.
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Saturday, August 27th, 2016 AT 2:50 PM
Tiny
HMAC300
  • EXPERT
You need to see if it has enough pressure if not enough your engine won't start or run follow the first reply and the info I sent on how to check it.
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Saturday, August 27th, 2016 AT 3:24 PM

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