Contour Enthusiasts Group Archives Forums General Troubleshooting feels like I'm hitting a rev limiter

My car just had a complete tune-up,repalced IAC,and the MAF was replaced be ford which fixed just about all my problems but one. When I go to full throttle from 40-50 mph the car will downshift and then it starts bucking like crazy and feels like I'm hitting a rev limiter and it won't stop unless I let off the gas a little and then the rpms cimb good. It used to only do it at full throttle but now it's starting to do it at 1/2-3/4 throttle also. I've done some research and I'm preety sure it's the fuel pump. What do you guys think? Also I have like no time on my hands to tackle this myself so what do you think ford would charge for a fuel pump replacement.

I agree that it sounds likely that you are losing fuel pressure. Have you changed the fuel filter yet? It would be good to start there. If the old filter is not plugged and the problem persists, then you should get a fuel pressure gauge hooked up and see what happens to your fuel pressure when it is acting up.

It is also possible that you have an ignition problem and that is why it would be good to check the pressure before you replace the pump.

sounds like the fuel pump.