Please Help having problem with my 92 mtx

[shome1992]

I had big problems about 6 months ago. The car had red-hot cats & sounded like an old VW bug. I replaced the DIS, fuel pump and filter, and spark plugs. That fixed the problem. Till now it’s starting to have some of the same symptoms. It started skipping real bad and bucking at low RPMs. So I changed the DIS and It got a little better now it has a skip at low RPMs like I have a bad plug and it is giving me codes 556/543. Any help with this will be greatly appreciated.

New symptom to add today it has started stalling on me too. I think its the CPS but not really sure? Also got a new code 212.

212 IDM circuit failure
543 Fuel pump secondary circuit failure
556 Fuel pump primary circuit failure

 

[shome1992]

tac sticking

New symptom the tac has started to stick too. Its stays around 3 grand at idle.

 

[laxmax327]

check your fuel pressure. id say the pump is either messed up or not getting enough power or something.

 

[shome1992]

Replaced the fuel pump 6 months ago along with the fuel filter.

 

[etc1006]

543 Fuel pump secondary circuit failure
556 Fuel pump primary circuit failure

IIRC I'm getting one of these on my car, but it runs fine...