Random missing problem

[RockfordSHO93]

Hi guys hope you can help me because I'm really getting frustrated. I have a 93 atx with 116,000 on it and about 3 weeks ago I put gas in it and a couple hours later it started missing and backfiring. I just got it back on the road after sitting for 3 years so the first thing I did was put a new set of bosch plugs in it new wires put a new tps on it (was one of the codes it was throwing) switched the coil pack from my 94 because was showing coil pack 2 on my scanner and switched the egr sensor because it is showing below min. voltage. Still having the same problem. Just ran key on engine running slow codes and it pulled up
167
Tps change insufficient response test (new tps)
225
Response test knock sensor not detected (can't find a new to replace it with)
327
Egr sensor below min voltage (been replaced)
129
Maf/map change too low dyn response test
712
No dtc definition found see service manual
I'm just baffled by this seen as I just put almost 20 miles on it yesterday with no problems at all. Please help I'm lost and I love my car.

 

[sperold]

Water in the gas is my bet. Run some gas line antifreeze through it, it should improve almost instantly. The gas that was sitting might have picked up water through condensation, or the new gas could have been waterlogged, even though it is supposed to be full of ethanol.

I put in bad gas just before a 2 hour trip at midnight through some pretty lonely country. Worst nightmare of my life. Backfiring through the intake, stumbling and stuttering, my knuckles were white and so was I. Never so glad to shut it off when I reached home.

 

[rubydist]

167 is an operator error code, so ignore that for now. (you didn't goose the throttle enough at the right point in the test.)

the codes display from smallest number to highest number, so the fact that you reported 129 after 327 suggests that you didn't ignore the separator flash. that would allow you to get a 712 by grouping the numbers wrong.

do the key on, engine off code retrieval and tell us what you get.