Hi,folks

My wife own a 91'740tic. with 80k (and we really luv it). We haven't had any problems for the last 2 years and suddenly the car had a weird problem (at least for me)
The symptoms,
start fine and after warm up (10 min or so) it start to cough and then the engine stop. I re start the engine and it run well for a couple of minutes and then the rpm goes down,coughing and stop. I put a load on the throtle it run ok (rpm >1000) but when ever i release the load it start to cough,rpm goes down and then the engine stop. The obd gave 1-1-3, 2-3-2 code.
With the assistance of a volvo mechanic (friend of mine)we did the following :
-Clean TB, IAC, adjust the TPS
-Check vacum hoses (it seems noleak except the hoses from airbox (after the AMM)to turbo)
-Replace the injector relay (i bought a bosch relay )
-Check the fuel pump relay (its ok), O2 sensor (its bad, didn't replace), AMM is good

After we did the above, the car run OK but the iddle still rough (400 - 750)and the OBD gave 2-3-2 code. We are going to replace the hoses and try to re-adjust the TPS.
Some other things that come across my mind are ; bad FPR, bad exhaust line, incorrect TPS adjustment, bad injector, dirty fuel line)
So please advise me of what i have to do to solve the problem.
I appreciate any opinion
Thanks

David