error codes

I Have A 1990 Deville 4.5l. The Error Codes Are Displayed On The Climate Control Center. I Know What The Codes Are That Have An "e" Before The Number. I Need To Know What The Codes Are That Have An "f" In Front Of The Number. I'm Going To Assume The "e" Stands For Error, Does The "f" Stand For Fuel??? The Numbers Displayed That I Need Answers For Are "f46" And "f47". I Think Maybe I Have Bad Fuel Injectors Because I Have Changed Plugs, Wires, Distibutor Cap And Rotor And I Still Have A Miss Only When I Put A Load On The Car Such As Going Up A Hill Or On The Expressway. Idling And Around My Community Are Fine. I Guess The Question Is...is "f46" And "f47" Telling Me That I Have Bad Fuel Injectors And Are Telling Me Exactly Which Ones Are Bad. The Cadillac Dealer Wants $80.00 To Tell Me What The Codes Read. Please Help!

Thanks

Check here... its dependant on the year but the codes are listed and also how to get to them...

http://myweb.accessus.net/~090/dtcobd1.html