Vortec 350 engine misfiring

[Stepside_fever95]

Changed plug wires and cleaned the throttle body with tb cleaner. That helped it a lot and hopefully plugs will take care of it.

 

[Stepside_fever95]

After more riding on the highway, it's actually just as bad. Is it possible that my intake gasket is letting air in? It has been skipping ever since i replaced the lower intake gasket.

 

[Jrgunn5150]

After more riding on the highway, it's actually just as bad. Is it possible that my intake gasket is letting air in? It has been skipping ever since i replaced the lower intake gasket.

That's pretty likely also, mine, at a steady cruise will chug/miss briefly

Also, when the weather was warmer, it was flooded whenever I'd stop at a gas station or whatever.

As for the MPFI, just the new spider and a new plenum gasket, my AC-Delco unit came with the gasket

 

[Stepside_fever95]

So its a direct plug and play basically?

 

[Jrgunn5150]

Yep, its the OE replacement, not like a fabbed thing or anything

 

[Jrgunn5150]

Mine looks like this inside, definitely leaking on 6 and 8

You must be registered for see images

You must be registered for see images

 

[Jrgunn5150]

I needed a 5/8 crows foot to get the lines off at the bracket to pull the rail up

 

[Stepside_fever95]

Hows it running now?

 

[Jrgunn5150]

Hows it running now?

Like a champ! Gas mileage, throttle response, idle quality, starting all like a new truck now.

It quit cutting at at steady cruise, easy starts now, much much better... I do have some other issues though I'll need to deal with..

If you can get a scope or something inside your TB to see if it looks like mine, you can narrow it down

 

[Stepside_fever95]

Thats great to hear! Im taking it to a local mechanic my grandpa knows well to see if his computer gives more info on the code. If its the injectors, ill definitely go with the MPFI spider.