MAF Sensor Gasket

[Daryl333]

Does anybody know the P/N for the little rectangular Gasket that goes between the MAF Sensor and the mounting flange on the Intake tube?
All I've been able to come up with is this:
3L3Z-12B615-BA
But I'm getting mixed answers from Ford OEM sites.
Thx.

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[MiamiGT350]

Tasca Parts looks like it matches. Be sure to provide your VIN.

 

[KingKona]

That's something that could be cut from some other material. It's like a flobbery bit of window sash insulating stuff.

 

[Daryl333]

Seems there is no added Gasket.
There is one that comes attached to the Sensor. Probably why I couldn't find it.
Sprayed the area with Propane no change in idle misfire. So that's not the problem.
Damn...

 

[tdstuart]

Seems there is no added Gasket.
There is one that comes attached to the Sensor. Probably why I couldn't find it.
Sprayed the area with Propane no change in idle misfire. So that's not the problem.
Damn...

If you think it's an intake leak just save yourself the time and get a smoke tester. Trust me it will be worth it.

I also couldn't find any part number from the ford parts website.

 

[Daryl333]

If you think it's an intake leak just save yourself the time and get a smoke tester. Trust me it will be worth it.

I also couldn't find any part number from the ford parts website.

We've done 2 smoke tests, 3 Propane, starter fluid tests, new Plugs, new Coils, new maf, new tuner(tune)
New fuel return system, new gas, HPTuners Crank relearn, inj tested, fuel trims good, no knocking. Of course no codes. Vac at 20.3 on dash,Vac on AEM Gauge 20, Fuel pressure boost reference 49 PSI, AFR good.
Going for a Compression test next week new tuner wants this done before me doing any logging.
But on last tune it went
673 HP
535 TQ
Which is pretty much spot on for a Canadian octane 91 tune.
Would an unhealthy engine be able to pull these numbers?
Whipple Gen 3 3:75 pulley.

 

[tdstuart]

We've done 2 smoke tests, 3 Propane, starter fluid tests, new Plugs, new Coils, new maf, new tuner(tune)
New fuel return system, new gas, HPTuners Crank relearn, inj tested, fuel trims good, no knocking. Of course no codes. Vac at 20.3 on dash,Vac on AEM Gauge 20, Fuel pressure boost reference 49 PSI, AFR good.
Going for a Compression test next week new tuner wants this done before me doing any logging.
But on last tune it went
673 HP
535 TQ
Which is pretty much spot on for a Canadian octane 91 tune.
Would an unhealthy engine be able to pull these numbers?
Whipple Gen 3 3:75 pulley.

Only misfiring at idle? And if it's not throwing any misfire codes then it's not misfiring hard enough haha.

A compression test would be a good start. It's totally possible one cylinder is low on compression but just at a sweet spot where it's causing misfires but not enough misfires to cause the cel.

Do a compression test. I would have done it way before replacing my fuel system.

If a cylinder is constantly misfiring you will get a specific misfire code for that cylinder. Sometimes though, if one cylinder just isn't running right, for whatever reason, it will throw off the car causing random misfires. Usually, you will get a random misfire code.

If your compression test finds something, get a borescope and see if you can identify if it may be piston/ring, or if you are lucky maybe valve/head. Check for scoring on cylinder walls, damage to piston, and damage to valves.

If the compression test finds nothing, then find a shop that has a good engine code reader (snap-on makes a super good one). The one snap-on makes has the ability to count engine misfires and will tell you exactly what cylinders are misfiring. Even if no code is thrown your engine will count misfires and log them. This way you can see if you are dealing with certain cylinders or random misfires.

 

[Daryl333]

Only misfiring at idle? And if it's not throwing any misfire codes then it's not misfiring hard enough haha.

A compression test would be a good start. It's totally possible one cylinder is low on compression but just at a sweet spot where it's causing misfires but not enough misfires to cause the cel.

Do a compression test. I would have done it way before replacing my fuel system.

If a cylinder is constantly misfiring you will get a specific misfire code for that cylinder. Sometimes though, if one cylinder just isn't running right, for whatever reason, it will throw off the car causing random misfires. Usually, you will get a random misfire code.

If your compression test finds something, get a borescope and see if you can identify if it may be piston/ring, or if you are lucky maybe valve/head. Check for scoring on cylinder walls, damage to piston, and damage to valves.

If the compression test finds nothing, then find a shop that has a good engine code reader (snap-on makes a super good one). The one snap-on makes has the ability to count engine misfires and will tell you exactly what cylinders are misfiring. Even if no code is thrown your engine will count misfires and log them. This way you can see if you are dealing with certain cylinders or random misfires.

I got the fuel system cause I was having WOT misfires with boosta pump and OEM pump.
Instead of troubleshooting I just bought a return system which I was probably going to do in the future. It got rid of the WOT misfire but not idle misfire.
I've had it on a scanner but don't know if they were tracking misfires or if it could for that matter.
Nothing showed in the first tuners logs about misfires.
New tuner (Lund) wants comp test, in hindsight I should have done earlier. But car runs good except at idle so thought something mechanical.
Rings etc didn't even come into the conversation once the numbers were good on the dyno.
But if the engine is hurt wouldn't the numbers be even better?
Like I said earlier the numbers were what was expected for my set up. But if something is found in the comp test will check with Boroscope for sure.
By the way thx for your help.

 

[tdstuart]

I got the fuel system cause I was having WOT misfires with boosta pump and OEM pump.
Instead of troubleshooting I just bought a return system which I was probably going to do in the future. It got rid of the WOT misfire but not idle misfire.
I've had it on a scanner but don't know if they were tracking misfires or if it could for that matter.
Nothing showed in the first tuners logs about misfires.
New tuner (Lund) wants comp test, in hindsight I should have done earlier. But car runs good except at idle so thought something mechanical.
Rings etc didn't even come into the conversation once the numbers were good on the dyno.
But if the engine is hurt wouldn't the numbers be even better?
Like I said earlier the numbers were what was expected for my set up.
By the way thx for your help.

I wouldn't read into the numbers too much.

Who was your previous tuner?

And Lund can't see any data about misfires that I know of. Try to see if you can find a performance shop or even a Ford dealership that will use a snap-on scanner to check misfires. When I was in highschool we had an automotive shop and I got to play around with the snap-on scanner on a friend's sn95 mustang. The scanner was able to read all the misfires on the cylinders. It can also pull up system faults that might not show up as cel. Since you aren't getting any data from the cel I would look into this.

Also how bad is the idle misfire? Have you tried unplugging individual coils to see if you can point to an individual cylinder? Is it a constant misfire or does it do it randomly?

 

[Daryl333]

I wouldn't read into the numbers too much.

Who was your previous tuner?

And Lund can't see any data about misfires that I know of. Try to see if you can find a performance shop or even a Ford dealership that will use a snap-on scanner to check misfires. When I was in highschool we had an automotive shop and I got to play around with the snap-on scanner on a friend's sn95 mustang. The scanner was able to read all the misfires on the cylinders. It can also pull up system faults that might not show up as cel. Since you aren't getting any data from the cel I would look into this.

Also how bad is the idle misfire? Have you tried unplugging individual coils to see if you can point to an individual cylinder? Is it a constant misfire or does it do it randomly?

Wengerd was first tuner.
Actually misfire got louder with Lunds tune Vacuum reading increased. But tach isn't fluctuating like it did with Wengerd.
What i meant was all trims and cycles etc were good in the logs so he said.
Yea misfire is like a intermittent wump wump wump that I can hear as well as feel when sitting in the car. Hot or cold.
The shop I use has a good scanner and but we didn't use it because Wengerd said the idle misfire was normal because the Whipple 132 is such a large TB and he couldn't tune TB Angle.
Trust your tuner right?
Anyhow when he told me that after we checked the engine for leaks etc I had to find someone else to tune it to find out for sure. Lund says there is no problems tuning a Whipple TB.
I just got a disc removed from my back a week ago so I can't get under the hood to do things like pull the Coils for testing right now like I used to.
But will see what happens when they do they comp test.

 

[tdstuart]

Wengerd was first tuner.
Actually misfire got louder with Lunds tune Vacuum reading increased. But tach isn't fluctuating like it did with Wengerd.
What i meant was all trims and cycles etc were good in the logs so he said.
Yea misfire is like a intermittent wump wump wump that I can hear as well as feel when sitting in the car. Hot or cold.
The shop I use has a good scanner and but we didn't use it because Wengerd said the idle misfire was normal because the Whipple 132 is such a large TB and he couldn't tune TB Angle.
Trust your tuner right?
Anyhow when he told me that after we checked the engine for leaks etc I had to find someone else to tune it to find out for sure. Lund says there is no problems tuning a Whipple TB.
I just got a disc removed from my back a week ago so I can't get under the hood to do things like pull the Coils for testing right now like I used to.
But will see what happens when they do they comp test.

I don't know if you have heard my issues with Wengerd, but we probably shouldn't go down that rabbit hole or we will get attacked by the mob haha.

I hope your back gets better!

You should also be able to hear a misfire in the exhaust if it's bad enough.

Let me know when the compression test results are in. I don't know if you should be hoping for good compression test results or bad. If they are bad at least you know what the problem is, but it's also going to be an expensive problem.

Like I said, if the compression tests are fine, get a good scanner that can read individual misfires. Then pull coils one at a time. This should let you know if you are dealing with pesky cylinder/cylinders or if there might be a general issue at play.

Also, I remember reading about some guy dealing with a weird leak on his whipple. A smoke test couldn't identify it. I don't remember If it was happening when it was hot and cold or only hot. Anyway, it was something with the whipple unit itself. He managed to find the leak and fix it, but I remember thinking at the time that there was no way I would ever think to check that or find that leak. Hopefully, this is not something similar.

 

[Wengerd Performance]

Wengerd was first tuner.
Actually misfire got louder with Lunds tune Vacuum reading increased. But tach isn't fluctuating like it did with Wengerd.
What i meant was all trims and cycles etc were good in the logs so he said.
Yea misfire is like a intermittent wump wump wump that I can hear as well as feel when sitting in the car. Hot or cold.
The shop I use has a good scanner and but we didn't use it because Wengerd said the idle misfire was normal because the Whipple 132 is such a large TB and he couldn't tune TB Angle.
Trust your tuner right?
Anyhow when he told me that after we checked the engine for leaks etc I had to find someone else to tune it to find out for sure. Lund says there is no problems tuning a Whipple TB.
I just got a disc removed from my back a week ago so I can't get under the hood to do things like pull the Coils for testing right now like I used to.
But will see what happens when they do they comp test.

Idle misfires are not normal. If you have a DTC for a misfire there is a issue.

Did you check to see if you cracked any more spark plugs like the last one which we called from the start?

Did you confirm a misfire or just think it sounds like you are hearing one?

So far 2 well known reputable coyote tuners appear to have the same issue so you deff have something going on with the car.

If you were semi local i would deff come out in person and find that issue for you.

We said nothing about not being able to tune the TB angle??? We tune the 132 all the time so not sure why you are sharing miss information??

Also the fuel system fixed the lean condition not the misfire.

Replacing that spark plug that had the cracked insulator fixed your wot misfire

 

[Wengerd Performance]

I don't know if you have heard my issues with Wengerd, but we probably shouldn't go down that rabbit hole or we will get attacked by the mob haha.

I hope your back gets better!

You should also be able to hear a misfire in the exhaust if it's bad enough.

Let me know when the compression test results are in. I don't know if you should be hoping for good compression test results or bad. If they are bad at least you know what the problem is, but it's also going to be an expensive problem.

Like I said, if the compression tests are fine, get a good scanner that can read individual misfires. Then pull coils one at a time. This should let you know if you are dealing with pesky cylinder/cylinders or if there might be a general issue at play.

Also, I remember reading about some guy dealing with a weird leak on his whipple. A smoke test couldn't identify it. I don't remember If it was happening when it was hot and cold or only hot. Anyway, it was something with the whipple unit itself. He managed to find the leak and fix it, but I remember thinking at the time that there was no way I would ever think to check that or find that leak. Hopefully, this is not something similar.

You mean this issue? Maybe learn how to install an intake properly. Clearly it's going to leak with a rigged setup like this

 

[tdstuart]

You mean this issue? Maybe learn how to install an intake properly. Clearly it's going to leak with a rigged setup like this

@Daryl333 Haha see. I don't want to pollute your post with the "drama". If you want more details about the situation you can look at my account posts (me and Wengerd have talked publicly about it several times) or DM me or if you want Wengerd's side DM him. I'm not going to respond anymore about my situation with Wengerd here because it just takes over the thread.

Also Wengerd I said I wasn't going to get into it, why can't you do the same, makes you look desperate every time you try and bash me. I've tried to be very courteous to you, I like your posts when you post good info, I don't bash you, I don't take over threads about you with my experience, and I've never even placed direct blame on you.

 

[tdstuart]

Idle misfires are not normal. If you have a DTC for a misfire there is a issue.

Did you check to see if you cracked any more spark plugs like the last one which we called from the start?

Did you confirm a misfire or just think it sounds like you are hearing one?

So far 2 well known reputable coyote tuners appear to have the same issue so you deff have something going on with the car.

If you were semi local i would deff come out in person and find that issue for you.

We said nothing about not being able to tune the TB angle??? We tune the 132 all the time so not sure why you are sharing miss information??

Also the fuel system fixed the lean condition not the misfire.

Replacing that spark plug that had the cracked insulator fixed your wot misfire

Definitely a car issue.

What would you suggest for confirming the misfire?

My ideas were to unplug coil packs to identify a cylinder that is repeatedly misfiring and use a good scanner that can track cylinder misfires to try and identify random misfires or more complex misfires.

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