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Aight yall when I start the car it idles fine then when I put the car in drive and pull off I have little power at a low rpm and sometimes it backfires in the intake i changed the plugs, coil pack and the egr valve, when i pulled the plugs i had 4 different plugs in the car so the guy that did the tune up is gonna get it when i see him. Also i just install a pype's x pipe system and i have a slight exhaust leak.. but i there's no check engine light at all so any info would be helpful but I'm thinking its the Optispark or the cranshaft sensor..........
 

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Recheck for proper spark plug wire routing and attachment to the opti. Other than that, small vacuum leaks need to be looked for and varified repaired. a vacuum guage here will help. You described some popping in the intake, therefore i would have fuel pressure verifed. Maybe change the fuel filter.

Chris
 
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