So if it is off by one tooth, the ignition timing will be off and not correctable, or can you make the IT right? The guy I bought my truck from just did the timing chain (himself), and it's low on power, and I've checked everything (mostly). Good comp., Cat not clogged, plugs are new and burning nice, non-huge tires, air filter clean, etc. Could he have messed up the TC job, or would the truck not be low on power, but barely running?