sorry, i have an intermitent problem. sometimes when i push on the gas it sounds like it puts the engine in a strain( reminds me of when the choke stuck open on older cars. cold natured.) I have no codes set. i have put new map,mass air flow,tps,fuel pump,fuel filter,air filter, and ignition control module. i changed the egr with a "known good" one. tech says converter checks out fine. he also said that the fuel pressure dropped from 42 down to 38 when it started to act up.