Weird Hesitation under WOT

Another update: They are keeping my car overnight. I was told they are in contact with a Ford who has different things that wants them to check. I have a bad feeling about this, I guess we will see. I cant imagine it can be something very bad as the car drives wonderfully under normal conditions, its only under WOT that it hesitates/brakes up/ skips. I will give another update tomorrow.

Oh and there was no oil in the sparkplug wells, did not check the COP's but I am sure they did by now and if there was an issue they would have caught it.
 
UPDATE: They found the problem. They need to replace an injector and the car will be done tomorrow around noon. How would an injector go bad on this car? I am pretty sure the previous owner used 87-89 octane as it was an older gentleman. Would that do it? Any ideas how to prevent this in the future?
 
Octane rating shouldn't have anything to do with a bad injector.  There have been a few cars with this problem (actually way worse than yours some have had gas almost pouring out their CATs).  I believe the high cylinder pressures associated with direct injection are just hard on these things so occasionally you can lose one.
 
As posted above, fuel injectors are known issues on these engines, so the issue here is that they caught & fixed the cause of the hesitation.  Back to rip roaring good times!
 
SHOnUup said:
Congrats on the pretty easy fix on a relatively short stop at the dealer. May warrant a good review?

Rich
Click to expand...

Yup Definitely. I think they are my new place to go to incase of car problems/oil changes.
 
Got the car back last night (had to wait an extra day because they received a wrong O-Ring with the injector >:. The car drives even nicer now I love it lol. They also did a compression check before they figured out that it was the injector and the numbers were all 200 and within 1% of each other according to the note I got with my receipt. I am assuming they are good numbers as they are so close to each other?

Thanks!
 
Tune that thang!  Very solid all around from the sound of it.  Not surprised the numbers are so close, what with the expectations after the torture test.
 
SHOdded said:
Tune that thang!  Very solid all around from the sound of it.  Not surprised the numbers are so close, what with the expectations after the torture test.
Click to expand...
Oh it will be tuned by next April-May. I will start getting parts together (t-stat, 3-bar, plugs,etc). I already have the xcal tuner but not in a hurry to tune it as its goint to be hard putting the power down during winter anyways haha
 
panther427 said:
It's completely drivable in winter with a tune
Click to expand...

I know but I don't see the point of hurrying to get tuned if I cant use the power. Plus I don't know about the winter gas and getting tuned. I will go with Torrie so he would have to re-tune once we start getting summer gas. Not going to go through that, data logging sux imo lol. I will get it tuned with summer gas and just go to stock during winter time.
 
ElvenSho said:
panther427 said:
It's completely drivable in winter with a tune
Click to expand...

I know but I don't see the point of hurrying to get tuned if I cant use the power. Plus I don't know about the winter gas and getting tuned. I will go with Torrie so he would have to re-tune once we start getting summer gas. Not going to go through that, data logging sux imo lol. I will get it tuned with summer gas and just go to stock during winter time.
Click to expand...
You can use the power.

Winters are long and there will be good days to go out and have some fun.

Part throttle map is unchanged and it's not like you're going WOT when it's snowing. Well, at least you don't have to...

However, kicking the big girls ass out sideways is loads of fun.

;D
 
I am having the exact same issue as you have been describing.  Hesitation under WOT, but perfectly fine under every other condition.  Since I am out of my warranty period I will probably just get it fixed.  I do have the extended powertrain warranty (100k miles) since I bought it as a "certified lincoln" but Im afraid to take it in since I have it tuned and have the 3-bar sensor swapped on there and whatnot. 

Is there an easy way to check and see which injector might be going bad?  How much do injectors for these cars cost and where is the best place to get them?  And is it an easy install?  (I haven't started looking into this yet....just figured I'd ask and then start searching)

 
Grimster said:
I am having the exact same issue as you have been describing.  Hesitation under WOT, but perfectly fine under every other condition.  Since I am out of my warranty period I will probably just get it fixed.  I do have the extended powertrain warranty (100k miles) since I bought it as a "certified lincoln" but Im afraid to take it in since I have it tuned and have the 3-bar sensor swapped on there and whatnot. 

Is there an easy way to check and see which injector might be going bad?  How much do injectors for these cars cost and where is the best place to get them?  And is it an easy install?  (I haven't started looking into this yet....just figured I'd ask and then start searching)
Click to expand...

Hello,

I am not sure if there is an easy way to check, they had to put it on the computer and it took them a whole day to find out what the problem is, good luck!
 
I think the injectors are about $150 each or so... check to your system to see if any misfire DTC codes are registering. They will identify the cylinder.  Going from right to left as you face the transverse engine they are 1-2-3 in back and 4-5-6 in front.  That should give you a good starting place for the changing of injectors.
 
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