fuel pump

[klonfes2000]

so i cleaned the MAF sensor but the car still hesitates , not as bad ,so i'm thinking of cheking the fuel pump,any ideas on how to do that?

dont know were it is or how to check it, help plz!! by the way , the hesitation starts only after the car warms up. what could be the problem?
Modified by klonfes2000 at 7:57 AM 4/25/2009

[GerryO]

A fuel system pressure test would tell you something, but personally I don't think the hesitation problem is fuel pump related.

I'd look for simpler things. Checked the spark plugs and engine timing? What octane fuel do you run? How many miles on the engine, and how clean is the plenum and all things related, such as throttle bodies, EGR tubes, PCV valves, etc and how about the condition of various vacuum lines? Have you checked for any codes, as some don't trigger a CEL?

[klonfes2000]

spark plugs are new,engine very clean, 148k on the car .i just got a scanning tool and will try to get something now.

[kickenkrazy]

year?my tps sensor tested fine but i changed it 70 bucks made a big difference also shake wiring when car running (camsensor map tps the one that runs on drivers front i found loose connection on cam sensor .....good luck