1995 Isuzu Pickup

I have a 1995 isuzu pickup with 130000 miles on it, have two problems, it is hard to start in the morning, had it to five mechanics already and still have the same problem, change all sensors, and put in new fuel pump but still doing the same thing. Problem two is that when you are driving down the street the check engine light will come on and the truck like it lose power, if I take my foot off the gas peddle the light will go off and the truck will run good again. Please help I have had these problem for two years now and have spent more money trying to fix it then what I payed for the truck