Just got my motor rebuilt and put back in the Z. (See sig for mods) When I accelerate, the car stumbles and jerks back and forth like it doesn't want to go. It also misfired on me twice tonight. Any suggestions?

 

i accidentaly ran out of gas one time, and it started stumbling during acceleration like it wasnt getting gas and jumping back and fourth, filled up, and put a STP fuel injection cleaner thing in it, and it was still doing it alittle, filled up again and put another stp fuel injection cleaner in it and problem was solved...but i doubt thats whats wrong with yours considering you just rebuilt it...was the gas in it old? or was gas really low and u drove it to gas station? some times when you let it get too low the garbage thats built up in the bottom over the years..(little debres etc.) can go up and get into the injecters...i doubt thats your problem but thats just my 2 cents

 

new opti? hows the fuel filter? fuel pump?

 

Since you say you had the motor put back in. Check to see if the plugs are on the right firing order, and then see if any plug wires got burnt.

Vinny

 

I am guessing its a problem with the plug wires.

 

Thanks for the suggestions you guys, it's being checked out today.