Ford Mustang Forum banner

1989 mustang running rough and loss of power

2032 Views 9 Replies 3 Participants Last post by  87frankenstang
ok so i have been working on this for a couple of days now and i think i need some help. so i found that when it is idling it runs fine but when i put it in gear it and give it a decent amount of gas(not full throttle) the car slows down but when i give it full throttle it gives it enough gas to accelerate but no where near as fast as this mustang normally accelerates. so i looked at plugs, wires, cap, and rooter and not knowing how long ago they have been changed out(i bought this car a year ago used) i replaced that and it help out a little bit but still ran really rough. changed the fuel filter and then it ran great again but only lasted for about 2 days before all the problems came back. replaced the fuel filter again to find the new one i just put in was clogged up again but unfortunately this did not fix the problem. tested the fuel pressure yesterday and found it idled at 35 psi and ran at 40 psi and i think the number are good.? i rechecked the firing order and all the parts i just replaced to make sure there was no where and everything check out good. ran the check engine codes yesterday and it told me that there is a problem with the mass air flow sensor, and the oxygen senors. don't really know what to do about the oxygen sensors yet but i did clean the mass air flow sensor and cleared the code but it just came right back. im up to any suggestions on what to do next i have ordered a new mass air flow sensor to hopefully fix it.
1 - 1 of 10 Posts
I'm also gonna say maybe the fuel tank I just had to replace mine do to rust as well and either way clogging a filter in two days I say drop the tank and take a look.
1 - 1 of 10 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.