Fo_Mo_Co

the check engine light came up, and of course went to check it at autozone and advance auto, and like most times the codes said that it was all of my o2 sensors..all four.

this is what the car does.
when im driving, and the engine reaches normal temp and after like 30 minutes of driving, the car starts to die on me. especially on the highway. i may be going 70 mph, and then the car starts to lose power and like if its needing fuel. pressing the gas pedal just makes the car shake, and stall, and eventually die.

After the engine had been running for a while, i tested the fuel pressure when the car was on, , the reading was 35-40 psi...but within five minutes of the car idling it starts going down to zero...and the car dies.

it has a new fuel filter. so wanna know if its the pump, the cps sensor, or the 02 sensors. its a 00 mustang.
any advice?????

RyansQuick6

All 4 don't go out at once. Check your MAF, see if it's dirty.

Fo_Mo_Co

yup, i checked it and its clean.....some people say that the 02 sensors wont make the car act up, and die by itself...but i know that if they are faulty, the car doesnt idle well i think. idk, lose gas mileage too...what are the signs of faulty o2 sensors.?????

Zach333

hmmm the rear o2's wouldnt make the car do that i know

faulty o2's really only cause bad gas mileage cuz the air/fuel ratio gets thrown off... i wouldnt think it would get to the point your car would die because of it

you can test the o2's with a volt meter... i'd google that cuz i wont be able to explain it as well as something you will find elsewhere

LilRoush

What were the actual codes they pulled?

bgnn32

It is very odd that all 4 would go at the same time, They could (although again not likely) cause the problem you are describe, but that is a 100:1 shot.

If you post the actual codes that would be helpful.

Fo_Mo_Co

(UPDATE) OK HERE IS WHAT I DID. I TOOK THE TANK OFF THE CAR AND GOT ANOTHER TANK AND FUEL PUMP FROM A GOOD RUNNING STANG, SAME YEAR.

Ok. when i took off my old pump. the strainer was full of gunk and bits and pieces of some sorta material inside of it. anyway i disconnected the battery so the codes reset and no check engine light came out. i drove the car with the other pump and it ran good. didnt lose pressure and the car didnt die on me.

BUT, it didnt idle well, and the codes came on again. i hear an exhaust leak too in the right side of the engine. i think its where the exhaust manifold connects with the flange and the down pipe....

the codes are the following : po135, po155, po141
so is it the god damn sensors or what?

Fink

P0135 - 02 Sensor Heater Circuit

P0155 - O2 Sensor Heater Circuit

P0141 - O2 Sensor Heater Circuit