I have a 1998 Silverado 1/2 T 4WD I drove to work low on gas (I know, a no no) and all seemed fine. 2hrs later I started it and it ran rough and I thought I may be running out of fuel so I put gas in. Started it and it continued to run rough and the SES light began flashing. I drove home 35 mi very slowly and cautiously and the problem continued. Seemed like a severe misfire, I could feel it shake under any load, stronger under heavier load. The SES light flashes while driving and stays on continiously at idle.
Checked air filter, (ok) replaced fuel filter. Problem persists.
OBD = 2 codes, P0301 (misfire cyl 1) P0301 pd ( I assume because the problem continues)
MIL = on
Monitors = 0 Incompete
8 Ready - Misfire, Fuel, Comp, Catylst, Evap, O2 Snsr, O2 Htr, EGR
I cleared the codes and sarted the engine,mis continued and codes returned with the exception of a few of the monitors reported incomplete, I assume because I didn't run it long enough for the test to complete (raw fuel it Cat converter fear).
Replaced plugs with Bosch platinium, old plug were worn but did not appear fouled or wet. Problem persists.
I'm wondering if I should follow with trial and error ie wires, cap, roter etc or does this scream of something specific to anyone? I hate replacing parts and sensors etc only to have the problem continue.

The truck is my work vehicle (cabinet maker), has 148,000 mi, has been well cared for and I don't beat on it. It has been a real horse for me and up to now the only problem I ever had with it was a bad fuel pump. I am the only owner

Thank you!

Joe-

 

The code is telling you that the problem is with cylinder 1... I'd check the spark plug wire first and replace the spark plug, see if that resolves your problem.

 

I have since this post replaced the cap, rotor, wire with out noticing any improvement. I've also added injector cleaner but am leary to drive it and let the stuff do its thing due to the possibility of ruining the cat convertor or doing other damage. I have read that some vehicles will sense the raw fuel and turn of the fuel to that hole to protect the cat convertor. Is this true and if so would that be a feature on this motor? Bad idea to drive it?

Thanks

Joe-

 

take out both front o2 sensors,r disconnect the exh. at manifolds.and rev to about 5k rpm with no load running low on fuel u either got trash in the injector r it ran lean and melted the converter.

 

I would change the fuel filter as well.

peace
Hog