1990 Volvo 740 gl, non turbo 105,000 miles
My 740 gl had its fuel pump replaced a month ago. When it was installed the mechanic broke my gas gauge. I drove the car 85 miles and the nest day it started but when I went to accelerate the car would bog down under 2500 rpm and not go. I tried it a few times and very few times I got the car to drive once it was past a certain rpm. I had an issue with the windows and was messing with relays and hope when I fixed the windows I didnt disconnect anything. I had it towed and looked at. They checked the mass air flow sensor, throttle position valve sensor, cam sensor, cataylic convertor checked, and timig belt checked. I replaced the fuel filter, new plug, wires and air filter. Ive checked fuses and fuel pressure. What is causing my car to do this when I accelerate from take off? It starts and idles fine, just when I go to take off the car just seems to kick back and not want to go. Please help me, Im at my wits end and have had no car for 4 weeks. Pep boys said my car is a nightmare and I should come get it now.