1996 ex cab z71 4x4 missing and studdering when under a load

[lburrows16]

when u are just putting around town it is fine, when at full throttle it does not miss, when u are just getting to a higher speed casually it misses, can someone please help!

 

[bluex]

Is the check engine light on. If so are there any codes present. If the light isn't on still check it for codes because it could have burned out

 

[TwoPedal98]

What do your plugs look like?

 

[Alljackedup408]

Sounds like what mine does around 60mph +. New wires plugs cap and rotor for me.

I have read up on it.. some say the spider injection... others distributor gear... some fuel pressure. Could be alot of things..... I am curious to find out what your issue is. keep us posted.

 

[19-Silverado-98]

Has anyone figured this out? Mine is doing it as well and it is really bothering me. Spider injectors and wires are about a year old. Plugs, cap and rotor are about 2 years old. It just started doing it along with a unusual starting. Ever so often it will like clunk when starting. Or will start very slowly. Like at a low rpm and all of a sudden shoot up to where it's suppose to. I'm stumped. I don't know. I've tried different gas stations. Different grades of fuel and nothing changes.

 

[19-Silverado-98]

Mine is a 98 ecsb 5.7l 4x4.