Whole truck jerking violently now at highway speed.

[McFizzl]

I had a slight lurching feeling awhile back. Well tonight the whole truck was jerking violently and I thought it was either about to just blow up or the tranny was gonna drop outa the thing. The only things I have changed since my lurching were at new cap and rotor and a fresh fuel filter. I have no idea whats wrong with it and I'm tempted to put it up on craigslist tonight.

 

[BRUTUS_T_HOG]

Sounds like bad plug wires or cracked spark plugs.

If you have a flat distributor cap don't use a cheap one or you will get severe cross firing. I prefer to use Delphi, AC Delco, or NAPA Echlin

 

[McFizzl]

Bought the masterpro dist. cap since the budget is super tight. Gonna pull all the plugs and check for anything out of the ordinary and clean and regap and see what it does. What about the ignition coil?

 

[retorq]

Could be coil, could be TPS, both of those will (should) throw a code though.

 

[BRUTUS_T_HOG]

Bought the masterpro dist. cap since the budget is super tight. Gonna pull all the plugs and check for anything out of the ordinary and clean and regap and see what it does. What about the ignition coil?

Trust me. Cheap caps cross fire like crazy. I've even had a couple that would stop the engine from starting.

 

[SunlitComet]

never buy any product that has the words master or pro or best or performance in the actual brand name. you are just wasting money.