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2005+ Mustang GT 4.6L Tech Technical discussion about the 2005+ Ford Mustang GT 4.6L

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Old 07-10-2017, 01:10 PM   #61
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Ford alternators have a two year warranty, most aftermarket brands are generally 3 months to a year. Ford has a new line called Omnicraft to compete with these cheaper product lines, but I can assure you its complete Omnicrap. I personally would buck up for a Power Master but I couldn't afford it at the time. If you do change you alternator let us know your results, good luck man.
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Old 07-10-2017, 02:23 PM   #62
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I have recently been talking to a friend of mine that I have not talked to in 30 plus years. It is ironic that he has gotten into Mustangs and has built some really fast pro street cars. he also had his own shop until recently moving and now is setting up a new place. Unfortunately he is in Alabama and I am in NJ. He told me he has also seen a lot of problems with aftermarket alarms causing this problem, and I have a Viper alarm on this car. He said the first thing he does when one comes in his shop is rip out the aftermarket alarm because they are no better than the stock alarm and for the most part use the stock system for all the triggers. My problem is that this car did not come with the original Ford alarm fobs.

Bingo, I just called a lock shop I did a lot of business when I was a locksmith with the college I worked for and they can not only supply and program remotes for me but he knows a guy that can remove the alarm the right way and solder any cut wires. No crimp connector used. And the price is well worth me not hurting my bad back doing it myself!!!

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Old 07-12-2017, 04:16 PM   #63
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I went out the other day and hit the alarm and I noticed that the cats eyes on the drivers side lights did not work. Turned on the parking and fog lights and no fogs and no left cats eyes or parking light. (cats eye are tied into parking light) Right away I am thinking I never pulled that SJB to look at the back of it. Well I ran my errands and got home and checked the lights and everything works. Guess that means I am buying a new SJB. I doubt that is going to solve the issues with the engine but we will see.
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Old 07-13-2017, 12:11 AM   #64
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if you go back to your first post, you basically found the issue, you said there was knock activity when hesitation occurred. so time to figure out why is the knock sensor going off.

that is where i would look.
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Old 07-13-2017, 08:21 AM   #65
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This is true but that knock activity can be triggered by many different things from timing to lean condition in one injector to a loose lash adjuster or cam follower. Where to start? I plan to get it in the garage and pull the valve covers and possibly the front cover to look over the entire valve train if for no other reason then to eliminate any possibilities. I already have new lash adjusters and cam followers to put in just due to mileage.
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Old 07-21-2017, 11:00 AM   #66
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And you all thought I was just going to let this die like all the other threads on this subject huh? Ain't happening! I am STILL working on it. I just replaced the SJB with a brand new one, not used. I was told these need to be programmed and I had planned to have it done when I took the car in for the air bag but I do not see anything that does not work as it did before. Is there something that I am missing here? I do not want to just hand the dealer 185.00 for nothing!!!

Have any of you ever replaced a MAF sensor with a Stock Ford replacement and found it to be bad? This car shows all the symptoms of a bad MAF sensor but I do not really know what I should be looking at on a data graph of the MAF pattern. It does jump all over the place all the time. If I find that it turns out that the very first part I replaced was a bad part and I have put over a grand in it since I am going to go ballistic!!!!
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Old 07-21-2017, 01:44 PM   #67
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Quote:
Originally Posted by Phil1098 View Post
Not sure where he could buy an alternator that will take a return. I've never seen any electrical part that you can return.
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Originally Posted by TheGing View Post
Ford alternators have a two year warranty, most aftermarket brands are generally 3 months to a year. Ford has a new line called Omnicraft to compete with these cheaper product lines, but I can assure you its complete Omnicrap. I personally would buck up for a Power Master but I couldn't afford it at the time. If you do change you alternator let us know your results, good luck man.
I've bought a TYC alternator for a different car through Rockauto which failed after a year and 13k miles. Luckily it came with a lifetime warranty and Rockauto took it back. They also refunded the shipping cost. A+ customer service. Don't mean to veer the thread off course but I wanted to throw that out there.
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Old 07-21-2017, 01:52 PM   #68
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I went out the other day and hit the alarm and I noticed that the cats eyes on the drivers side lights did not work. Turned on the parking and fog lights and no fogs and no left cats eyes or parking light. (cats eye are tied into parking light) Right away I am thinking I never pulled that SJB to look at the back of it. Well I ran my errands and got home and checked the lights and everything works. Guess that means I am buying a new SJB. I doubt that is going to solve the issues with the engine but we will see.
What do you mean by cats eyes?

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Have any of you ever replaced a MAF sensor with a Stock Ford replacement and found it to be bad? This car shows all the symptoms of a bad MAF sensor but I do not really know what I should be looking at on a data graph of the MAF pattern. It does jump all over the place all the time.
Your first post mentions replacing the MAF sensor based on what it showed on the datalogs. What did you see then versus what you see now?
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Old 07-21-2017, 03:43 PM   #69
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Cats eyes are the LED light rings around the headlights and driving lights.
What I saw on the data way back then was that the baro pressure would never change and the outside temp was off by 20 degrees. That was all fixed with the new sensor.
I just went out and disconnected the MAF and went for a ride and no hesitation of dropouts at all but it sure was flat with the Brenspeed program installed. I did another datalog looking mostly at load, MAF and cam angles. The cams are almost in the retarded range at WOT which seems a bit strange to me. I though the whole idea behind the variable cam was to be able to advance it at higher rpms? They are advancing and retarding, they go all the way up to 46 degrees I think I saw but they are not there at full throttle. I am not pushing it to the redline but I am at around 5,000-5,500 when I shift.

The replacement SJB made no difference at all, Just another wasted 300.00!
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Old 07-21-2017, 08:43 PM   #70
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the 3v will only retard the cams.

post a log with cam angle actual and commanded, ltft, stft,maf volts, pressure drop across injectors, knock retard, spark.

maybe the data will tell something
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Old 07-22-2017, 09:49 AM   #71
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I'll see what I can do, do I just attach the file here?
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Old 07-22-2017, 09:56 AM   #72
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Tried to upload the datalog files from my computer and it tells me they are "Invalid files".
They are .csv files from my SCT and Livelink.

You will have to tell me how to get the file on here.
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Old 07-22-2017, 10:03 AM   #73
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Quote:
Originally Posted by rickf View Post
Cats eyes are the LED light rings around the headlights and driving lights.
They're actually called angel eyes.

Click the image to open in full size.

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The cams are almost in the retarded range at WOT which seems a bit strange to me. I though the whole idea behind the variable cam was to be able to advance it at higher rpms?
The stock VCT retards the cam timing from 3750rpm upwards.
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Old 07-22-2017, 10:36 AM   #74
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I knew something did not sound right! I was also working on my RV with the tire management system and that is called Cats Eye so there is the confusion. Thanks for calling me out on that.
Now that I think about it retarding the cams at higher rpm makes sense. I am an old guy and still think old school so you have to excuse me in that respect. I am a retired master tech but I retired in 2002 when these motors were in their infancy and at that time I was in charge of a truck fleet so I did not get to work on them. I understand all of the OBDII theories and procedures but some of the nuances of the Mustang are tripping me up. And it aggravates the hell out of me that I am looking at data logs and I "should" be able to spot the problem but I am not seeing it. I am sure it is there for someone who is up on these to see but I don't see it.
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Old 07-22-2017, 10:58 PM   #75
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email them to me...i will take a look. [email protected]

please make sure you capture the hesitation a couple of times during the drive.
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Old 07-23-2017, 11:16 AM   #76
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Possible front O2 sensor issue except that you say the STFT's are good.
Mine thought that it was going lean so it was actually dumping fuel into the engine.
Fortunately I don't have any cats for it to destroy.
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Old 07-23-2017, 10:33 PM   #77
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looks like thump called it.....the log showing bank 1 is kind of flat bank 2 is switching fast

thats really all i can see thats odd.

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Old 07-24-2017, 09:00 AM   #78
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I'll definitely take another look at it. When I am looking at it in real time they both appear to be switching the same. If you said bank two was bad I would be inclined to believe it since my converter went out on that side.
Unfortunately on the logs I sent you I did not catch any heavy stumbles or dropouts. It always seem to happen when I am not logging. Being a lifetime mechanic I know how that is, the customer would bring the car in and it would never act up in my presence. With 96,000 on it I may just replace both upstream O2 sensors. Hell, I have replaced everything else.

In the meantime I will keep on running logs and hope I can catch the problem on one of them. Thanks for taking the time to check it out.
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Old 07-24-2017, 12:42 PM   #79
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I looked at a couple of the logs and found that the bank 1 O2 sensor had several 39 volt spikes. In the 070817datalog2 file they are at the #3, #610 and #762 marks.
Any ideas what would cause those spikes? I don't think that is causing my problem because I do not see any reaction to the rest of the data at the time of the spike but if it is RF from somewhere that may be an issue.
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