I have a small problem. Car idles badly I changed spark plugs and it got worse.Cleaned throttle body,IAC.New plugs Autolite 104's & new NGK 8mm wires. New PVC hoses and valve. Car runs fine except when is sitting and idle. I have had bogg down a couple times going uphill the hill was really steep. but car acted like it wanted to stall when you gave it gas. Any thoughts.