I had my spark plugs changed out today. I bought Denso, and no other engine work was done....but the weird thing is when I let off the gas the car feels like its going to shut off. It only does this when I let off the brakes at stops. When im driving this does not happen what could it be?

 

Wow so no one has come across this before?

 

check engine light illuminated?

 

Check the spark plug wires

 

Denso Iridiums ? Were they the exact same plugs as were removed?

 

check all vacuum lines, also check your plug wires. did you replace them or use the old ones? maybe one of the old ones discentegrated like mine did.
goood luck

 

It sounds like one of the coil packs just didn't get seated properly on the plug or, as mentioned, one of the wires has lost some of its conductivity through corosion of the wire or connector. Most of the above-mentioned faults should trigger a check engine light, including the one I suggested, but it is possible not to. Go back and check all your connections before you go spending more money.

 

I don't know much about this stuff but maybe spark plug gaps are off?