i have a 97 z28 auto 67,000 miles...just replaced...fuel,air filters changed plugs. car has hesitation from stop to go.....as if when you stomp on the gas it has to t hink for a second. i have cleaned out the iac and no codes are showing even. this was like this before i changed the plugs...so i did this to see....wires look good....there is no idle problems.

if im going like 5mph and stomp on the gas it will drop into gear and squeal but its that 1 sec of hesitation from stop to go!


when the car starts up cold from staying over night...and i start the car up...the car runs so strong...im thinking something is getting too warm and causing this hesitation.

 

your transmission is slipping

 

no its not transmission related...thats fine...its good...its just the push on the pedal and from there the car has to thinik of what to do next then its like OH SH*T YEAH I HAVE TO GO. then it takes off...

 

Coil, perhaps.

 

im thinking that and the module....i work for an acdelco company so i get parts at cost...but i dont wanna keep putting parts on unless they have to be replaced thanx for every imput!

 

Maybe you could borrow a coil/module assembly from someone to see if that is it.

 

hmmm...yeah....no one really off the top of my head has one...maybe ill just spend the $50 for the delco module and $20 on the coil... also while im at it maybe ill space it away from the block...thanx keep the ideas coming!

 

Check your intake elbow. I had a friend who had the exact same problem and it turned out his intake elbow was torn where it connected to the throttle body. Once he replaced that, the hesitation was gone.