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Re: tuning pcm on whippled 00 5.3
If you run the stock computer with larger injectors it will run like crap and foul out the plugs. I would recommend having a mail order tune done on your computer. Some shops require you mail them the PCM and they will mail it back tuned. A few will send you out a new PCM in advance and you just swap it out and send back your stocker.
03 Silverado SS | 98 Camaro Z28 | 89 Sierra 5.7 | 70 Chevelle SS 454 LS6
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