Well if it wasn't blown up before, it will be now that that crap is in there...

But go back to basics before thinking if the worst case. I highly doubt a good running engine, especially one of the old 5.3s, just went from running fine to dead that quick.

I would first check for power to the o2 sensors and make sure no wiring got moved and melted during the change of the sensors.

Also make sure all your spark plugs are tightened. Don't kill them, just make sure they aren't loose. Also give the truck a good once over of the engine and make sure nothing is amiss with any of the sensors.

What codes are in it? I'd imagine running that poorly there should be some codes set

 

^^^^ this.

Probably should have used OEM AC/Delco sensors.

 

P0134 o2 sensor circuit no activity detected b1s1
P0135 o2 sensor heater circuit b1s1
P0138 o2sensor circuit high voltage b1s2
P0141 o2sensor heater circuit b1s2
P0155 o2 sensor heater circuit b2s1
P0158 o2 sensor circuit high voltage b2s2
P0161 o2 sensor heater b2s2
P9300 random/multiple cylinder misfire detected

 

I'd put the old wires back in, clear the codes and try again. No way the engine is toast.

I know how you feel, I've damn near cried like a little girl more than once trying to fix something. You just get over your head a bit but it always works out. Keep us posted.

 

Get four new AC Delco sensors and put them in. I'm pretty sure your O2 codes will go away. While those go away, I'm pretty sure the random misfire will also disappear. Your plugs/wires are most likely fine.

Oh... And your engine is not toast.

 

#1 - you didn't blow the engine, LOL.

#2 - I concur with others. Buy/install OEM sensors

 

you haven't really blown an engine until you are picking up parts that flew out of the hole in the oil pan. keep trying.

 

What plugs and wire did you use?

 

New ACDelco Spark Plugs 41-962 (8) + (8) Herlux Spark Plug Wires WGM48

 

But I now see that the Herlux wires are for the round style coil...I have the square. Which is why they were barely long enough.
I am ordering new spark plug wires, and new AC Delco O2 sensors.
I am still confused as to why it ran so perfectly for the first 10 or 15 miles. better than it has ever run before, like so perfect. That is until I put my foot into it. But up until then it ran so smooth. That is really the part that scares me.

 

It can take up to 150 miles +/- for the ECM to relearn variables from new parts such as O2 sensors, etc. When the ECM began to adjust for the new sensors, it couldn't resolve everything it needed to keep the motor running well.

 

Did you happen to purchase the ACDelco spark plugs and the Herlux spark plugs wireset as a package deal off of ebay?

 

I agree with everybody. Blown engines generally make a clunk sound, and then no more sounds after.

Also, anytime you fix something and it goes to hell it is most likely the thing you fixed that is wrong.

 

Ok I changed the o2 sensors back to acdelco and it Is running beautifully now
Thanks everybody

 

Thanks for posting. Glad you got it sorted out. You can never go wrong with OEM parts. In fact, it seems like OEM is the smart way to go, even if it's more money.

 

Glad to hear it was that easy. And thanks to bringing the issue to closure also here. There are too many threads where people never come back and post what the solution was, if any. It's aggravating to bump into all of those when searching answer to a problem you have.

Also agree with Dave above, AC Delco is a pretty damn good choice in many (most) cases. They just seem to work the best. And the prices aren't really that much higher than other stuff.

 

In many circles, Bosch spark plugs and O2 sensors are considered to be junk.
Their oil filters are fine, however.
Glad to hear your problems are sorted!

 

Thanks for coming back to update us on the outcome.
Note to self, Use AC-Delco O2 sensors when it is time.

 

Good to hear as others have said. And we like when people report back the repair it helps so many. But it is funny how GM only likes there original parts and when you do it works so well like thinking you blew motor

 

Id do a flush and get that crap out of your motor also !!!

 

Well, to be fair, the trucks are made to use the AC-Delco parts. So, it makes sense that they were all designed to work well together.

 

It's not a good feeling. Lol