2003 Silverado 5.3 118k miles currently.
So, I mentioned a while back in the whore thread after I first got my truck that I had taken it through a car wash and it fell apart. P0300 flashing check engine light, the whole nine. Was around 108k miles then.
That's fine, I have just hand washed it since. That's better anyways. And thusly it hasn't had another episode until Friday evening. Drove through a torrential down pour that was flooding roads. Pulled up to an intersection and it was chugging. Solid misfire but no codes this time. Pulled into a gas station and got gas and let it air out a minute while the down pour became a drizzle and all was fine after that.
Has also had a slight miss at idle as long as I've had it. Misfire counters can't catch it and no codes.
After the first incident I done plugs/wires hoping that would cure it but now I've seen the issue again so it didn't help. Tried googling my issue and best I could find was mostly unrelated threads blaming intake gaskets so that's what I've figured it was. Water pours through the back of the hood/cowl area and gets on the intake. Tried spraying with carb cleaner with no results.
Had always said I'd do a water test but never got around to it until now and sure enough, splash of water around the intake mating surface and she starts bucking. P0300, flashing cel, cylinders 3, 4, and 5 all throwing high misfire counts 50-1100 counts.
Now my main reason for posting, of course water got on the injectors as well but still safe to assume intake gasket? I've looked over all the wires and see no obvious issues that could be affected by water.
I've decided it's safe to throw gaskets at it and see how it responds BUT still thought I'd get a couple opinions beforehand. Will also take care of leaking valley cover and valve covers while I'm in there that deep.
So, I mentioned a while back in the whore thread after I first got my truck that I had taken it through a car wash and it fell apart. P0300 flashing check engine light, the whole nine. Was around 108k miles then.
That's fine, I have just hand washed it since. That's better anyways. And thusly it hasn't had another episode until Friday evening. Drove through a torrential down pour that was flooding roads. Pulled up to an intersection and it was chugging. Solid misfire but no codes this time. Pulled into a gas station and got gas and let it air out a minute while the down pour became a drizzle and all was fine after that.
Has also had a slight miss at idle as long as I've had it. Misfire counters can't catch it and no codes.
After the first incident I done plugs/wires hoping that would cure it but now I've seen the issue again so it didn't help. Tried googling my issue and best I could find was mostly unrelated threads blaming intake gaskets so that's what I've figured it was. Water pours through the back of the hood/cowl area and gets on the intake. Tried spraying with carb cleaner with no results.
Had always said I'd do a water test but never got around to it until now and sure enough, splash of water around the intake mating surface and she starts bucking. P0300, flashing cel, cylinders 3, 4, and 5 all throwing high misfire counts 50-1100 counts.
Now my main reason for posting, of course water got on the injectors as well but still safe to assume intake gasket? I've looked over all the wires and see no obvious issues that could be affected by water.
I've decided it's safe to throw gaskets at it and see how it responds BUT still thought I'd get a couple opinions beforehand. Will also take care of leaking valley cover and valve covers while I'm in there that deep.