OK so I'm driving to work this am, and I notice that when ever my tach is jumping around so is my fuel pressure gauge (Autometer / mechanical) or vice versa. I don't know but they seem to be in on it together. After pulling my hair out looking for a vaccum, or air leak last night (after the last parts I need for my blower install arrived 
) I couldn't find anything. I pulled my chip off no difference. I reset my computer - no difference. So anyway my car accelerates perfectly. Usually idles perfectly, but at cruising speed normally in 5th at about 70-75 the car will buck and sputter. I push in the clutch and the tach drops slowly to 1,500 rpms, and jumps up, and down. That when I notice the fuel pressure fluctuating also. Once this am the tach went all the way down like it was about to die then shot back up, and the fuel pressure gauge shot up too. It seems like I've seen my fp gauge show more pressure recently than I'd ever seen before, and it seems to be running 2-3 psi lower than normal. So. What's wrong w/ my chit ? Fuel pump or filter ? Could one of those be my problem ? I have my 03 Cobra tank, and pumps now - can I put them in w/o the blower, and #42's installed, or altering my tune ? It's acting like my IAC is bad (except my idle is good), so I replaced it w/ a new Ford one, and no change.
) I couldn't find anything. I pulled my chip off no difference. I reset my computer - no difference. So anyway my car accelerates perfectly. Usually idles perfectly, but at cruising speed normally in 5th at about 70-75 the car will buck and sputter. I push in the clutch and the tach drops slowly to 1,500 rpms, and jumps up, and down. That when I notice the fuel pressure fluctuating also. Once this am the tach went all the way down like it was about to die then shot back up, and the fuel pressure gauge shot up too. It seems like I've seen my fp gauge show more pressure recently than I'd ever seen before, and it seems to be running 2-3 psi lower than normal. So. What's wrong w/ my chit ? Fuel pump or filter ? Could one of those be my problem ? I have my 03 Cobra tank, and pumps now - can I put them in w/o the blower, and #42's installed, or altering my tune ? It's acting like my IAC is bad (except my idle is good), so I replaced it w/ a new Ford one, and no change.
