Fuel Pump, or 02 sensors?????
05-02-2009, 03:05 PM
#1
Thread Starter
Join Date: May 2009
Location: TX
Posts: 22
Fuel Pump, or 02 sensors?????
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?????
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?????
05-03-2009, 03:18 AM
#4
Join Date: Apr 2009
Location: WV
Posts: 45
The o2's could be reading lean because of the lack of fuel.. Its highly unlikely that all four o2's are bad. Id say fuel pump.. Dont replace the O2s till you do that.. Save yourself some money.. The O2's are the last sensor the the engines chain of events before those exhaust fumes exit, and many different things can cause an O2 sensor to indicate a code..
05-04-2009, 08:31 PM
#5
Thread Starter
Join Date: May 2009
Location: TX
Posts: 22
(UPDATE) FUEL PUMP OR O2 SENSORS
(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?
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?
Thread
Thread Starter
Forum
Replies
Last Post