WELL HELLO ALL, IM NEW HERE AND IM HAVING SOME PROBLEMS. I HAVE A 2000 F150 5.4 VIN(L) EXT CAB 4X4
I RECENTLY REPLACED ALL PLUGS, INJECTORS, AND COPS. THEN DECIDED THAT SINCE MY TRUCK HAS 230K MILES TO REPLACE BOTH SIDE CATS WITH DIRECT FITS. WHICH LED TO REPLACING MANIFOLD STUDS AND GASKETS, AND ALSO THE DRIVER SIDE MANIFOLD AND EGR TUBE. AND I ALSO REPLACED ALL 4 O2'S OBVIOUSLY. AND I PUT FUEL FILTER ON TOO. AFTER THAT, I WENT THROUGH AND CHECKED ALL VACUUMS (P.M.) AND REPLACED THE ONES THAT WERE BRITTLE OR SOFT. SO HERES THE ISSUE, NOW I HAVE A MISFIRE WITHOUT A CEL. IVE ALSO HAD 2 CODES (P1132,P1152) WHICH I KNOW IS RUNNING RICH(SENSORS NOT SWITCHING) I ALSO REPLACED MAF... CAN ANYONE MAYBE GIMME A LITTLE INSIGHT AS TO WTF IS GOING ON? IM PULLING MY HAIR OUT AND I AM RUNNING LOW ON FUNDS. THANKS IN ADVANCE

 

 

I would ask you to be patient with my response because you did a lot that was not necessary for the cost and labor involved.
The codes you now have may be a leaking injector, leaking fuel regulator, faulty regulator at to high a pressure that could be causing the misfires.
The codes are set when the PCM detects a loss of normal voltage variation signal from the front sensors.
Since both banks are seeing the same condition, look at the fuel system for an issue.
It's not a filter, the MAF or any other parts but fueling.
Also look closely at the harness under the truck for being damaged while doing the replacements.
The motor is on the edge of being flooded.
Normally a loss of Ox sensor switching will cause the PCM to revert to a fixed fuel table to run the motor.
But if both the fixed table and a hardware fault occur together, the two may stack up and go even more rich.

A look at the live data with a Scanner would be worthwhile to see if other parameters are near or out of limits.
To detect one or more cylinders running in misfire, use the Scanner to look at mode 6, test 53.
There you will find the misfire records for each cylinder.
If one or two show up with counts out of limits, check the injectors for leaking, coils, coil harness plugups or plugs being fouled.
Don't fall back on the new parts excuse because there is a problem that needs to be found, new part on not.
Normally you need not replace parts unless there is an indication via code.
To much fuel or unburned fuel is a danger to the cats.
The instructions with the new cats should have had that warning in the instructions.
Good luck.

 

ok so after a vacation from the headache, i came back and checked the mode 6 data.
these are the ones failed
10-11, 10-21, 26-00, 2a-00, 2b-00, 56-00
Ive not worked with mode 6 very much so im kinda clueless. Any added input would be much appreciated

 

What cylinders are your reading related to?
Does you device state any readings are out of limits?
The reading you state are also in Hexadecimal notation.
It would be nice if all cylinders were zero or near but in the real world there are often misfires but very low in counts that are not a problem.Over time the software updates the counts. They may go up or down depending on what is happening.
Lets get this cleared then see what you have.
If you want to convert the Hex notation to Decimal, use your computer to bring up your utility conversion program for Decimal, Binary, Octal and Hex notation conversions.
Good luck.

 

Your scanner may display the misfires in hexadecimal.
(You can use your PC calculator to convert the counts to decimal.)

 

There is another way to catch a misfiring cylinder but it's 'cheating'.
If your device has a trap feature, set it up to trigger on the misfire and freeze the data.
It should show the cylinder.
But carry through with the mode 6 data and learn about it.
Make ya feel like ya accomplished something.
Once you get a hold of this tiger, you can take a look at times to see what is happening.
If the counts don't change much that's good.
Or you can reboot the computer and watch all over again over time what takes place for misfires.
If one cylinder keeps adding up more than the others look at the boot and boot seating for an issue, plug Porcelain cracks or a moisture problem...
See, there is a Santa after all!

Good luck.

 

Big question also is what brand parts (all of them) did you use.

Motorcraft plugs work best, but NGK seems to do well too.
COP, this is a big one. Motorcraft will be the recommended, but is costly. Veston (hard to find) also is recommended. I have heard good about ARAParts coils also (just ordered a set of them for my brother-in-laws '04). These 3 use all copper windings in the coils, not steel or aluminum, which fail easily. If you bought a $40-50 set of COP, that can be a huge issue.
Injectors, Bosch as far as I know is the way to go (but have not really looked into it much).
O2 sensors, again Motorcraft are the way to go, but have heard good about Denso.
MAF, Motorcraft only.
Cats, does not really matter much. I just ordered a pair of Bosal converters, also for my BIL truck.