Chevy Mechanic on here?

[HorseHunter]

Need some advice on a 1998 Tahoe (nice little huntin' rig) with the trusty 5.7 

Service engine soon light on solid then blinking

The code reader says P1035 (not p0135) I guess that is a mfg specific code and I cannot locate anything on the interwebs on it that is definitive.

Rough idle, a little backfire, exhaust smells of hydrocarbons 

Before I start throwing O2 sensors at the thing at $50 a pop, got any educated ideas?

I have plenty of my own uneducated ideas, so I don't need them. LOL, as the kids say.  

Thx

[Sky Island junkie]

Have you looked at the max airflow sensor? If something makes it passed the air cleaner and gets caught on that fine wire, the engine can run the way you’re describing 

[360 0r Better]

That is a NOX sensor code possible bad sensor or wiring to it this will usually make them run doggy.

[Beaton]

Crank sensor

[HorseHunter]

Forgot to add, I already replaced the Air Charge Temp Sensor 

 

[Beaton]

[HorseHunter]

18 minutes ago, Beaton said:

 

Yes, Hoping it's the Crank sensor $75 or the Knock Sensor $35 plus coolant. With 4 O2 sensors, I'd be playing Whack A Mole to guess which bank it was.

I will crawl under her and check those connections before the auto parts guys start greeting me by my first name when I walk in. I may be too late for that though 🙂   

Thanks for all the tips! 

[ctafoya]

My kids truck was running like that. Cant remember the code. Replaced plugs and was good to go. 

[HorseHunter]

Yes, they don't like to run well with fouled plugs.

This seemed to go bad quickly so I think if the plugs are bad the cause is one of the above-mentioned issues. 

I may need to go down that road too though. Thanks! 

[HorseHunter]

Incase anyone was curious, the verdict is that the distributor ear where one of the cap screws goes into was broken so that cap was opening and closing like a clam shell causing that misfire. I discovered after replacing a pile o parts and the cap, rotor, plugs, and wires. 
New distributor did the trick. Removal and install went pretty smooth.
Running like a top, passed emissions. Good to go til the next thing breaks. 

It’s always the last place you look. 

Thanks for the ideas!

 

[HyNoon]

Well at least it was in the heads like my problem was..... that's the expensive one .....