05 stx 4x4 4.6

2 cars down in 1 week, first my wifes 02 windstar trans takes a dump now my truck (again)


First I live in Michigan, and each time it has had this issue it was flipping cold out. -7 here now.

First time, started off to work and it fell on its face like it was starved for fuel. died and had to crank forever to get it running. then had to keep in low to keep rpms up to make it home. I put it on a code scanner and all it said was rich o2 sensors. of course they were rich I had to mat it to keep it going.

so I figure fuel flow issue, either pump or filter. changed filter and it seemed to be fine until my wife used it this morning. 2-3 weeks between issues.

This morning she went to church and had it die, same issue, crank and no start then eventually started, but ran like ***. black smoke and all. got it home went inside to start my search. went back out and it fired up, with no issue....

WTF?

So, what the hell is it?

I'm not thinking fuel pump, but who knows. MAF? catalytic converter(s)? O2 sensors? Injectors? Computer?

About 5 years ago I changed the fuel pump module, but when that died it just died, no in between.

I need help, we need at least one vehicle or else we will both lose our jobs... hers more important then mine.

Ken

 

Howdy.

Job #1: Post the codes - ALL of them - even the ones you may not be able to get to with yer scanner ( sotred pending codes that don't trigger a CEL).

FPDM's can degrade & not fail outright - no harm in popping the spare and having a look.

How old are the plugs, the front O2's, have you cleaned the MAF, the TB, Checked fer vac leaks, etc, etc. Checked injectors fer leakage, Maintenance history? Sounds like it's misfiring, at least.

Don't leave it too long - running rich WILL destroy yer cats, dilute yer oil and pekker the engine eventually if left unaddressed.

BTW - stuck thermostat may not allow it to go closed loop - and constantly enriching.

g'luck

MGD

 

Only codes are P2196 and P2198, no pending.

Maybe 25-30,000 since plugs changed. nothing else changed ever. So factory original. 225k miles on it. MAF only cleaned once in a blue moon by oil change place...

I have no idea where to even look for a vac leak. As for injectors, wouldn't it take more than 1 or 2 to fail at the same time for it to completely die like it is?

Im not ruling out the fuel module dying again, if its the same issue, its not acting anything like it did before. it would either start or not start before. no in between.

its -3 out right now so I get maybe 5-8 minutes before my fingers wont work.


If I unplugged the maf would it simulate the same issue as if it was dirty?

Ken

 

Classic lean conditon, BANK2 ( sensors are doing their job ). PCM is driving it rich trying to compensate.

Yer scanner can access Mode $06 data fer misfires?

Only folks cleaning that MAF should be you. Who knows what they used?

Unplugging the MAF will only set more codes.

225K on front O2's? - they are done, regardless of what else is found.

Injector leakage - need to be ruled out. Straightforward check.

FPDM has many failure modes - you name it, it's done it. Likely not fer one bank though.

TB needs removal/inspection cleaning - certainly @ that mileage regardless of whatever else is wrong.

Vacs leaks, un-metered air, etc - requires time but should be checked. Start with any hoses you find, the intake, etc. Exhaust leaks can also fool the O2's/

I understand that the weather is not allowing you the time fer proper diagnosis - so you may need to wait until it warms up ( or take it somewhere ).

https://www.f150online.com/forums/20...ruck-help.html

https://www.f150online.com/forums/v8...-pressure.html

... many more ....
MGD

 

And it's 0 out there? I'd go rent a car for right now and get one of the 2 vehicles into a competent shop.

 

Taking it to the Ford dealership in the morning... fearing a $1000 bill

Recent codes just pulled.

P0113
P0300
P2196

 

I think you are looking at an IAT sensor and an O2 sensor, replace BOTH fronts with that mileage.