p0304 and p0316

[WCNSHO]

I need some serious help. I am getting confused and cant get my car back to running normal stock even. I know number 4 was misfiring. New plugs 1 step colder. I had bought new coils but when I put them on the car ran bad. So went back to stock coils. Also been switching MAP sensors back and forth. Bought a new 2 bar and a new 3 bar for my 5 star and for my GH tunes. Now the car regardless of tune runs like crap and blinks engine light till it just stays on. I am back to stock tune and stock coils, no joy still. HELP!!

Also, what are the part numbers for stock sensor and 3 bar? I think I am messed up by which one I should have on now (stock 2 bar for stock tune)

 

[Majestic]

Difficult to tell from your picture, but the MAP sensor you change for a tune is the one on top of the engine under the cover.

 

[WCNSHO]

yes that is the one i am told is stock and on top of the intake manifold. Trying to verify that the one pictured is correct for stock?.

 

[Majestic]

I think that is the stock 2 bar.

 

[kryptto]

The correct part number is in my signature

3BAR MAP AA5Z-9F479-D

 

[kryptto]

Ford OEM replacement parts generally have the letter "Z" as the 4th digit in the part number. An "A" in this position would indicate a part that was originally installed at the assembly plant.

 

[WCNSHO]

So through all that I started getting a check engine for misfire in cylinder 4. NOTHING worked getting rid of it. Took it to shop, they are hinting now it may need an engine. I will find out more. Anyone else have a similar issue, misfire to needing engine?

 

[kryptto]

Misfires

2010 sho with 188,000+ miles. Not often but on Rsre occasions it has a misfire on one bank. Turn the car off, wait a minute and restart runs fine. Anyone else have this?

shoforum.com

I have always said - the answers are here - @Texas Marauder is providing the home based trouble shooting that needs to answer that question. I would get a detailed explanation that leads them to believe an engine replacement?

 

[BradM]

So through all that I started getting a check engine for misfire in cylinder 4. NOTHING worked getting rid of it. Took it to shop, they are hinting now it may need an engine. I will find out more. Anyone else have a similar issue, misfire to needing engine?

If it's not the coil or injector, it will be a valve train issue on #4. They'll likely do a power balance test and then pull the valve cover to inspect. Maybe a follower is toast.

 

[BradM]

If it's not the coil or injector, it will be a valve train issue on #4. They'll likely do a power balance test and then pull the valve cover to inspect. Maybe a follower is toast.

My bad. Our Gen1 EB's don't use followers (Gen2 use them).

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