I blew a hole in my muffler, and I don't have the $$ to get a Borla (yet). BUT It needs plates and a Echeck (ohio emissions).
I have pulled the codes from the car and tps came up. I'm going to try n patch the hole as a temp fix, and hopefully just long enough to pass echeck so that i can get a plate on it.
I'm going to replace the tps anyway, but does anyone know if the tps would cause backfire. I just don't want to patch the hole replace the tps, get it on the dyno and blow a fresh hole in the muff. the echeck guys would probably not pass it. (ha-ha)

A flakey ignition module will cause a backfire.

When I bought my car the TPS was cracked and when I unscrewed the two screws the threading came out... *grrr*....(not to uncommon I've been told) before I drilled and tapped new holes I put the broken TPS in a "middle" position, gave it a few rounds of duct-tape and I didn't notice any major difference driving home... well on the mileage perhaps.
When I installed the new TPS I played around with it to see if something happened but there was no significant difference... a little hesitation and rough idling.
I'm not sure but I think the TPS's function is to "fine-tune".
Correct me if I'm wrong....

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Jorgen Larsson
1987 Fiero GT
1968 Corvette Conv.
1998 Ford Escort RS Ghia

The TPS' role is really just for throttle change detection. This is necessary mainly when accelerating. In theory, a quick throttle change may be detected through a faulty read and cause the ECM to put extra fuel in but no more than a swift pump of the gas peddle. I don't think it would cause a muffler to blow out. I recommend looking at the fuel system and also check for vacuum leaks, timing, EGR (all the ususal suspects). Also, if you can get your hands on a DVM, check the output of the TPS to verify the computer's finding. GL hope this helps.