After tune-up no power in accerelation
replace 2 coils, spark plugs, general tune-up. changed oil, put fuel injection oil, gas saver,gas/engine cleaner. when you push on the gas padle very slow in pick up speed, even if you change gears no RPM increase. We have paid $480. to a certified auto repair have taken the SUV back but they said they performed the correct repair, could be the catalytic converter. Help please.
Are you hearing any popping sound under the hood. Like air popping. If so... The spark plugs may have been installed too loose or cross threaded. If so... You can lose compression thus losing power. Just an initial thought...
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