runnin lean????

[martinr69]

I'm saying you should disconnect the battery after or while you are doing the sensors.

Oh Ok but if he take it in to get those done they will do that. The O2 sensors are not that easy to get to..

 

[dysan]

Believe me, I know. I did them on my car when it was running lean. I ended up having to remove the one exhaust manifold to get it done.

 

[martinr69]

Believe me, I know. I did them on my car when it was running lean. I ended up having to remove the one exhaust manifold to get it done.

Yeah took mine in to get them done. And the mechanic bitched about it...

 

[big-j]

a lady i wrk with her husband wrks at a ford dealer so i gave her the codes and am havin him look em up if it is the sensor then ill replace em and put my o/r h pipe on.thx for info bout unhookin the batt i would of never done that.

 

[Eric Brooks]

Lean codes are more likely due to a vacuum leak or the tune being off. 02s go bad, but the other two are more likely.

 

[martinr69]

A code P0171 may mean that one or more of the following has happened:

• The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the [COLOR=#009600! important][COLOR=#009600! important]MAF [COLOR=#009600! important]sensors[/COLOR][/COLOR][/COLOR] leak the silicone potting material used to protect the circuitry.
• There could be a [COLOR=#009600! important][COLOR=#009600! important]vacuum [COLOR=#009600! important]leak[/COLOR][/COLOR][/COLOR] downstream of the MAF sensor.

Possible Solutions

Possible solutions include:

• In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
• Inspect all vacuum and PCV hoses, replace if necessary
• Check for a dirty [COLOR=#009600! important][COLOR=#009600! important]fuel [COLOR=#009600! important]filter[/COLOR][/COLOR][/COLOR] and proper fuel pressure

 

[big-j]

ok i just rememberd when i was doin the cmdp i broke the clip on the top hose in the pic but i put it back in and it holds it it wont come off but you can kinda move it when i pull and push on it could that be doin this????

 

[PUNISHERSTANG]

thats a vacuum line so definitely fix that clip. normally a vaccum leak will cause the engine to run rich because your losing vacuum and thats what the engine bases fuel pressure on. Sometimes though the computer will correct for the rich condition and make it lean. fix the clip and try that out. im a Ase Master tech and a ford mechanic. trust me when i say a fuel filter on a car that gets driven doesnt go bad. ive never EVER seen one fix a problem. people will change them at regular intervals, which is fine, but the retards i would work with would change one and reset a CEL and every time people come back and its always something else. dont change 02 sensors because it says its running lean, 9 times out of 10 thats the 02 sensor doing its job because your engine is running lean. Also your not supposed to clean a ford MAF, not sure about an aftermarket one that may come with an intake but they are extremely sensitive sensors and intake or brake parts cleaner will damage them!

 

[big-j]

ok ill go get a new clip and keep ya updatated thx

 

[big-j]

well i went to the dealer and of course they cnt just sell the clip so i had to order the whole danm hose that was 40 bucks.so i came home and washed my car and i had it in the garage sweepin it out and shit and i seen this orange rubber gasket on the floor i said to my self you got to be shittin me i picked it up and sure enough it was the throttle body gasket so ya im preaty danm sure thats the problem so i got a 40 dollar hose and clip comin that i dnt even need man im a dumb ass.all i can think of is it fell off or sumthin when i was messin with the intake and throttle body.

 

[dysan]

DOH!

 

[big-j]

ya all i can think of is i went to put it on and went and did sumthin else and forgot bout it or it wasent on all the way and fell off idk but i feel like the biggest dumb ass in the world but atleast i fixed the prob befor puttin o2's on or dropin alot of money in it to get it fixed thx for all the help guys