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Old 11-07-2012, 09:35 PM   #281
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I'm having a very similar issue! I've asked around and no one can answer me. I will be watching this closely

---------- Post added at 11:34 PM ---------- Previous post was at 11:32 PM ----------

My setup is a vortech v1 s-trim with LTs, full exhaust, 70mm TB/plenum, aftercooler, sct maf and twin cobra pumps

---------- Post added at 11:35 PM ---------- Previous post was at 11:34 PM ----------

How did you figure out what cylinder the problem was on?
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Old 11-08-2012, 05:50 AM   #282
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I'm having a very similar issue! I've asked around and no one can answer me. I will be watching this closely

---------- Post added at 11:34 PM ---------- Previous post was at 11:32 PM ----------

My setup is a vortech v1 s-trim with LTs, full exhaust, 70mm TB/plenum, aftercooler, sct maf and twin cobra pumps

---------- Post added at 11:35 PM ---------- Previous post was at 11:34 PM ----------

How did you figure out what cylinder the problem was on?
We have the same stuff, besides the superchargers and i have a 75mm. I called KB and they said it was in the tune and referred me to someone they know. The guy wasnt very helpful, he said he knew how to fix it but he wouldnt tell my guys how because it would take away from his biz which is in IL. I was dude im in MS can you not be nice and help out since im that far away and my responds was you can bring it up here for me to fix it so I hung up.

The way they found out which cylinder was they started to unplug the COP and injectors while running starting with #1. When they got to #5 the engine didnt react like it did with the other 7. Its getting fire and fuel because they hooked it up to a computer DIA tool like you find at Ford (TECH 2) and those two are pulsing like normal.

What I dont understand is if it was in the tune then why would it relate to one cylinder and all of the rest be fine?

How long have you ran your car like that?
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Old 11-08-2012, 09:14 AM   #283
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It's been doing this for about a month now. It is driving me insane. I have gone through and unplugged everything one at a time like you said with no luck. I'm lost. I've worked with cars my entire life and every other misfire I've seen will get worse the harder the car is run. What is the name of the guy you talked to? Maybe I can persuade try to persuade him

---------- Post added at 11:14 AM ---------- Previous post was at 11:11 AM ----------

Mine finally popped a CEL last nite. P0174 which is for an o2 sensor due to lean condition on bank 2. That means mine is on the same side as yours. I don't think I have a bad o2 sensor though I believe the slight misfire on one cyl just caused that to kick
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Old 11-08-2012, 09:27 AM   #284
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Just talked with my tuner. He said anytime there is a lean condition on only one bank it's one of 3 things. 1)Small exhaust leak on that side before first o2 sensor 2) small leak in the intake gasket on that side or 3) bad o2 sensor.

He also said that the reason it's only at cruising speed is because that is when your sensors are really working keeping track of AFR. I'm gonna tear into mine today and see what I can find. Also be sure to check the wires coming off the from sensor on that side for damage. Hopefully this will help us both out
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Old 11-08-2012, 01:31 PM   #285
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Hey if you can give me his number and name so where I can call him? Mine isnt throwing any codes that i know if, I dont have the car right now. From what the guys are telling me its just related to cyn 5 and not the whole bank. There is a exhaust on that side but its where the EGR tube went too and they did a s***** job on the welding. But it was doing that before the charger install. There is no leaks near the head. The 02's are new along with wire extenders.

Im starting to think its a intake gasket leak since its related to that one cyn. But wouldnt it show up on a leak down test or a code or something? I dont think its anything dealing with the motor itself, someone tried to tell me it was a burnt valve but you would see other signs right?
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Old 11-08-2012, 01:45 PM   #286
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Take starting fluid and spray around the manifold to check for leaks
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Old 11-08-2012, 01:50 PM   #287
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Take starting fluid and spray around the manifold to check for leaks
yeah I think thats what they were going to do today...im going to stop by there on the way home...i will let ya know what they say
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Old 11-08-2012, 04:05 PM   #288
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Ok, they sprayed everywhere with three cans of starter fluid and no reaction. I misunderstood what he said but 5 is clean like its a new plug while the rest look normal. We are thinking its a wiring problem or intermediate injector problem.
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Old 11-08-2012, 05:02 PM   #289
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I've been thinking electrical, has to be.
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Old 11-08-2012, 07:29 PM   #290
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I've been thinking electrical, has to be.
Yeah that's what we are thinking or injector problem.
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Old 11-09-2012, 02:38 PM   #291
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well they checked the injector with a checker and its working.....any other ideas?
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Old 11-09-2012, 03:16 PM   #292
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I would start switching parts from that cylinde to another. Like plugs, wires, coil packs, injectors,etc etc
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Old 11-09-2012, 03:53 PM   #293
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I would start switching parts from that cylinde to another. Like plugs, wires, coil packs, injectors,etc etc
Did that already and no change lol. Dude we have done everything in the book lol.
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Old 11-09-2012, 03:55 PM   #294
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Did that already and no change lol. Dude we have done everything in the book lol.
it doesnt make sense. if all individual external parts are functioning properly and only one cylinder is acting up, it has to be internal or tune. you said they also did compression test?
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Old 11-09-2012, 04:25 PM   #295
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it doesnt make sense. if all individual external parts are functioning properly and only one cylinder is acting up, it has to be internal or tune. you said they also did compression test?
Yep compression test was fine, along with the leak down. But when you tune, if there was a problem on that bank wouldn't you see it on other cylinders? I mean the computer tells when the injector to open and stuff but when tuning you don't just regulate one cylinder at time do ya?
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Old 11-09-2012, 04:29 PM   #296
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Yep compression test was fine, along with the leak down. But when you tune, if there was a problem on that bank wouldn't you see it on other cylinders? I mean the computer tells when the injector to open and stuff but when tuning you don't just regulate one cylinder at time do ya?
one cylinder at a time can be regulated using timing fuel injector pulses etc. as i not a 4.6 expert but i belive you can even do these things on foxes.
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Old 11-09-2012, 04:33 PM   #297
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one cylinder at a time can be regulated using timing fuel injector pulses etc. as i not a 4.6 expert but i belive you can even do these things on foxes.
Hmm.....well that might be it then I will call them Monday and see what they can do.
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Old 11-09-2012, 04:37 PM   #298
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Hmm.....well that might be it then I will call them Monday and see what they can do.
it is still wierd for that to happen.
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Old 11-09-2012, 04:45 PM   #299
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it is still wierd for that to happen.
Yeah I know....they have tuned stuff like before so I thought they would see that
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Old 11-09-2012, 04:46 PM   #300
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Yeah I know....they have tuned stuff like before so I thought they would see that
is the tuner the one who told you about the #5 issues? because if they knew it was an issue im sure they would have been able to correct it, of course if it were tune related. or they are just schisty..
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Old 11-10-2012, 10:11 AM   #301
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Harper, another member here on ME posted this link on the 4.6L. I remember you were looking for information on the various blocks, etc. Maybe this will help.

The Ford 4.6L Modular Engine
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Old 11-11-2012, 07:58 AM   #302
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Sorry to hear your still having issues with your car , I really hope you can get them worked out, I agree with Dreamstang if the tuner told you about the #5 cylinder issue they should be able to correct it or tell you what's causing the problem , you have had your car with them for quite awhile now, if they can't resolve the problem IMO I would be looking for a new tuner , one that specializes in tuning ford mod motors , I hope it all works out for you , I can't wait to see what this beast will do!!!
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Old 11-11-2012, 08:02 AM   #303
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I found out mine is an o2 sensor issue. Unfortunately my wires fell down on my LTs
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Old 11-11-2012, 09:08 AM   #304
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Sorry to hear your still having issues with your car , I really hope you can get them worked out, I agree with Dreamstang if the tuner told you about the #5 cylinder issue they should be able to correct it or tell you what's causing the problem , you have had your car with them for quite awhile now, if they can't resolve the problem IMO I would be looking for a new tuner , one that specializes in tuning ford mod motors , I hope it all works out for you , I can't wait to see what this beast will do!!!
well when they first tuned it was missing really bad due to copper plugs and the gap to wide. Then, the deal with the tube so he wanted me to change all of that and then he was going to clean up the tune. So when he was cleaning up the tune he noticed the issue with cyn 5. To me with everything checking out with the test its either tune issue, intermetated problem, or electrical. One guy I called said it was something with the tune and he knows how to fix it but wouldnt tell me. I just dont understand what there is in the tune that would islolate just one cylinder.

---------- Post added at 09:08 AM ---------- Previous post was at 09:07 AM ----------

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I found out mine is an o2 sensor issue. Unfortunately my wires fell down on my LTs
I wish that was my issue but I dont see this happen and causing a problem on one cylinder. Glad you got your fixed....
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Old 11-11-2012, 10:59 AM   #305
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You've been spinning your wheels with this guy for half a year.

I know you like him and say he's great.

Fact is he sucks and you need a new guy.

Please move on from this guy because actually this is kind of comical from the outside looking in.

Sorry to be a dick but dude you need a new guy.

I hate to see you suffer like this.
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Old 11-11-2012, 11:17 AM   #306
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You've been spinning your wheels with this guy for half a year.

I know you like him and say he's great.

Fact is he sucks and you need a new guy.

Please move on from this guy because actually this is kind of comical from the outside looking in.

Sorry to be a dick but dude you need a new guy.

I hate to see you suffer like this.
Yeah I agree because if the engine is mechanically fine with all of the test being run on it then moving everything off of five to six and the problem still there then its gotta be tune related.
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Old 11-11-2012, 01:38 PM   #307
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Just for kicks have you rechecked the torque on all the sc bolts?

Just trying to think of something different here.
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Old 11-11-2012, 02:03 PM   #308
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Just for kicks have you rechecked the torque on all the sc bolts?

Just trying to think of something different here.
Like to see if there is a intake leak?
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Old 11-11-2012, 03:41 PM   #309
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Yeah just reachin...
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Old 11-11-2012, 04:05 PM   #310
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Yeah just reachin...
yeah they sprayed starter fluid around that area and it didnt do anything.
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Old 11-11-2012, 04:12 PM   #311
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Another reach...there's a gasket issue on 5 that you can't see.
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Old 11-11-2012, 05:01 PM   #312
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Another reach...there's a gasket issue on 5 that you can't see.
Yeah but wouldn't you see it on a leak down test?
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Old 11-11-2012, 06:02 PM   #313
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Happy Veterans Day southernstang!
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Old 11-11-2012, 06:33 PM   #314
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Happy Veterans Day southernstang!
Thanks means a lot, but what would make it happy is for them to call me this weekend and say they have my car fixed.
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Old 11-11-2012, 06:34 PM   #315
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Thanks means a lot, but what would make it happy is for them to call me this weekend and say they have my car fixed.
I will definitely agree with that!
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