Daniel Myrick
TYF Newbie
Hi, I have an '03 Yukon 1500 XL with the 5.3L engine. When I started it up today to go to the store, there was a strong gas odor. I checked and couldn't find any obvious leaks, thinking the truck is running really rich. Took it around the block and the smell was strong and consistant, especially when stopped at idle.
Here is some history on what I've done recently. Last November the fuel pump went out. It was a slow, painfull death, lol. I dropped the tank and replaced the fuel pump. After I got it put together, it was running really rough. Not just for a minute or two like it was clearing out the air, but missing pretty good. I got a code (dont remember which one now) that lead me to replace the the fuel pressure regulator. Funny note, the truck is an '03, but the OEM regulator didn't fit, the one that came off was for an '02. Parts guy said it was an early year model, so they were still using up 02 parts I guess.
After that it ran good. Then about a month later in December, we drove up to the mountains to get a Christmas tree and on the way back down I got the P0420 code for bank 1. Never got around to swapping out the downstream O2 sensor, due to life and several other unrelated repairs.
A couple of months ago, I checked the codes again and this time got the code on both banks. Now I'm thinking fk, by now it probably needs all 4 sensors and maybe even the cats. But I was on the fence about trading it in, selling it, or keeping it for my son. So it's been about 7 months since I got the first catalyst system code in all, and I finally decide to sell it, but before I can, i am moving so i drove it like hell for about two weeks pulling a trailer and what not. Truck ran good, no major problems except my back!
That gets me to now. Last week I was broke AF and ran it pretty low on gas. Got paid yesterday and threw 60 bucks in it right away. About half a tank so I know I didn't overfill. Ran fine yesterday, no problems. That brings me back to the start of the post so I wont repeat.
Did the cats finally burn up and that is what is causing the smell? I guess my question is, is there anything else I should check into first that may be causing the gas smell before putting out about 800 for the california approved direct fit cat and pipes along with another 320 bucks for o2 sensors so I can sell it? Would it be better to just try and find a buyer and let it go as-is? Would the issues last fall with the fuel pump and the regulator lead to a steady decline of the cats even though the problem was fixed or is it more likely that there is still an underlying problem (I haven't noticed it missing or anything else)?
I will try and run a scan on it tomorrow and update if there are any new codes, but last I checked the two codes were P0420/0430. Any suggestions are greatly appreciated and if you need anymore details, let me know.
Thanks,
Dan
Here is some history on what I've done recently. Last November the fuel pump went out. It was a slow, painfull death, lol. I dropped the tank and replaced the fuel pump. After I got it put together, it was running really rough. Not just for a minute or two like it was clearing out the air, but missing pretty good. I got a code (dont remember which one now) that lead me to replace the the fuel pressure regulator. Funny note, the truck is an '03, but the OEM regulator didn't fit, the one that came off was for an '02. Parts guy said it was an early year model, so they were still using up 02 parts I guess.
After that it ran good. Then about a month later in December, we drove up to the mountains to get a Christmas tree and on the way back down I got the P0420 code for bank 1. Never got around to swapping out the downstream O2 sensor, due to life and several other unrelated repairs.
A couple of months ago, I checked the codes again and this time got the code on both banks. Now I'm thinking fk, by now it probably needs all 4 sensors and maybe even the cats. But I was on the fence about trading it in, selling it, or keeping it for my son. So it's been about 7 months since I got the first catalyst system code in all, and I finally decide to sell it, but before I can, i am moving so i drove it like hell for about two weeks pulling a trailer and what not. Truck ran good, no major problems except my back!
That gets me to now. Last week I was broke AF and ran it pretty low on gas. Got paid yesterday and threw 60 bucks in it right away. About half a tank so I know I didn't overfill. Ran fine yesterday, no problems. That brings me back to the start of the post so I wont repeat.
Did the cats finally burn up and that is what is causing the smell? I guess my question is, is there anything else I should check into first that may be causing the gas smell before putting out about 800 for the california approved direct fit cat and pipes along with another 320 bucks for o2 sensors so I can sell it? Would it be better to just try and find a buyer and let it go as-is? Would the issues last fall with the fuel pump and the regulator lead to a steady decline of the cats even though the problem was fixed or is it more likely that there is still an underlying problem (I haven't noticed it missing or anything else)?
I will try and run a scan on it tomorrow and update if there are any new codes, but last I checked the two codes were P0420/0430. Any suggestions are greatly appreciated and if you need anymore details, let me know.
Thanks,
Dan