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  1. afiveo

    90 GT Running rich, backfiring?? Help!

    ID89GT I had a BBK 70mm TB and spacer, 24lb injectors, C&L mass air, K&N cone filter and a upper with a ported TB openning. It never did run right so I put it all back to stock. (except a K&N panel filter) I thought that there was a problem with something I put on so I went back to stock with...
  2. afiveo

    90 GT Running rich, backfiring?? Help!

    I really do appreciate the info given so far. I will be honest though, I am a bit overwhelmed. I mean I don't have a clue what most of it even means. I'm not a total idiot by any means but I guess I need more of a "mustang repair for dummies". I am pretty mechanically inclined but most of the...
  3. afiveo

    90 GT Running rich, backfiring?? Help!

    thanks. It's just marked 600V DC or 600V AC, I'll use the DC.
  4. afiveo

    90 GT Running rich, backfiring?? Help!

    Thanks for all your help so far. I guess what I have is a multi-meter. Would I set it on AC or DC? Craftsman Model 82180.
  5. afiveo

    90 GT Running rich, backfiring?? Help!

    I just spend $90 on a timing light today and it looks like i will be spending more to purchase a voltmeter. lol. Geesch. I pulled the computer and it doesn't seem to have a "chip". Would it would be between the computer itself and the harness plug if it did?
  6. afiveo

    90 GT Running rich, backfiring?? Help!

    I have an Ammeter....not the same as a Voltmeter??? Sorry for the dumb question.
  7. afiveo

    90 GT Running rich, backfiring?? Help!

    I took it for a short ride down the road. It is actually driveable but still runs like crap. It is popping in the airbox while accelerating. Still seems to be missing a little also.
  8. afiveo

    90 GT Running rich, backfiring?? Help!

    OK, I got the timing set at 14 degrees. I removed and cleaned the IAC and re-installed it. Removed and cleaned EGR also. Now with the key on engine off I am getting these codes: 15 No Keep Alive Memory to PCM pin 1 or bad PCM (what's a PCM????) 33 EGR did not open/respond 66 MAF low...
  9. afiveo

    90 GT Running rich, backfiring?? Help!

    Codes are 41 System Lean 91 System Lean 33 EGR not open properly 18 Timing 12 ISC 21 ECT I'm going to see if I can go borrow a timing light and start there. Any other suggestions? It does have one of those idle bypass plates on it. Should I remove that and see what it does? It was...
  10. afiveo

    90 GT Running rich, backfiring?? Help!

    Going to go work on it now.
  11. afiveo

    90 GT Running rich, backfiring?? Help!

    I have a check engine light so I don't need a test light, correct? I have been reading the proceedure and plan on trying in in the morning. Do I just jumper it and then get in the car and count the flashes of the check engine light? That part I am not sure of.
  12. afiveo

    90 GT Running rich, backfiring?? Help!

    I haven't tried to get any. I'll have to do a search to see how.
  13. afiveo

    90 GT Running rich, backfiring?? Help!

    I have a 1990 mustang GT. I've had it for 14 years. All stock except K&N panel filter, Mac headers, h-pipe, flowmaster cat back, and a msd blaster coil. 92000 miles. It is undriveable as it is now. It is running so rich the exhaust fumes burn your eyes. Doesn't smoke, just running rich. The idle...
  14. afiveo

    Fuel System Help Please

    That's some good info! I'm replacing my fuel pump tomorrow so now I have a little more useful info. Thanks.
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