Hi all,

I was speaking with Anita back in June ironing out details for the purchase of Dynatech longtube headers. During a conversation she stated that they were moving shops and will be difficult to get a hold of at times. Then as many have posted, they disappeared.

I couldn't wait any longer as I had an exhaust manifold leak on the passenger side that was driving me crazy. (06 Roush charged 150)

So I purchased the LTs elsewhere a few weeks ago and had them installed yesterday. Its throwing a Lean bank 1 code, I think it was P295? There was another code as well when I got home yesterday, something else regarding an o2. I cleared both out last night and the lean bank 1 came on immediately when started it this am. I cant recall what tune I had loaded, it was either the tow or the moderate tune. I put it on the bad gas/ tow tune this morning but haven't driven it yet.

So my question is... Is there any recommendations of who to turn to now that Troyer is MIA?

Theres a shop about 2 hrs from me that said he can dyno tune it, but will not reprogram my SCT w tunes, just strictly tunes the truck as a one time deal and hes done. Its quite a bit out of my price range since having to purchase a new engine for the ski nautique last month... Id like to remain married, what do I do?

 

Hi.

From what I recall TP saying in the past, Dynatech's were one of the few LT's that did not require O2 transport delay tuning adjustments.

I'd focus on an exhaust leak upstream of the O2's being the culprit here - that will cause those codes. Not rare after an LT install if they were inattentive. Likely not coincidental, IMHO. Take it back to the shop and pester them.

good luck
MGD

PS - for tunes, contact MPT - ask fer Mike ( www.morepowertuning.com )

Member rep here on the site is 'MorePowerTuning'

Another alternative is Justin Starkey over at VMP - he knows Roush blowers very well ( www.vmptuning.com )

*** Yer TP tuning is locked to that vendor to protect the intellectual property within - no other SCT tuning shop can modify them - hence you'll need new tunes written, if tuning is the solution here, and you can't reach TP - just fyi.

 

Appreciate the info. I did try and listen for leaks while under the truck and hear nothing abnormal. especially compared to before where it was leaking extremely bad but threw no codes (before LTs)

I didn't do the entire kit if it makes a difference. Probably should have stated that. I was chasing an issue from purchasing the truck new in 06 and finally resolved it a cpl years ago. It was cat related but they never threw codes either, other than the occasional misfire code that would show on Fords diagnostic but not throw a CEL in the truck. Anyway, that being said, I had magnaflow cats installed at that time. the exhaust shop that did the install installed O2 bungs in a short pipe behind the flange of the LTs before going into the Cats that came with bungs in place. Id guess without going under the truck again that the O2s are roughly a foot apart front to rear. Would this be an issue w them being so close to one another? Grasping at straws here, sorry.

 

n thnx for the knowledge of the tuner. I wasn't aware of that, but makes sense. Never planned on having to go elsewhere but nothing is forever I guess. read some concerns of Mike being sick. Hope he is ok...

 

^^^ Anytime you alter the O2 location appreciably from 'stock', you risk throwing codes, and tuning correction may become necessary.

Leaks do not always need to be audible to be problematic - does not take much to cause issues.

BTW - are you using FRESH Motorcraft O2's? You should - I'd link you to VMP's forum article on this subject but that page is down at the moment. Call to get the details on why - ( basically, non-MC O2's are 'lazy' )

After 110% ensuring that ZERO leaks are present ( even if it takes a second or third opinion/inspection, as a persistent leak will never be fixed by tuning) ), I'd call up the fellers I mentioned to discuss yer next steps in detail.

Comprehensive datalogging is in yer future, reckon.

good luck
MGD

 

Hi.

The dealer-level SCT tuning software suite provides the facility for the tunin' feller (or gal), to 'secure' their work. Reckon not all tuners elect to do this - but TP does. ( Note- this is in addition to the tune file being tied to the specific device serial number ).

All the folks on here who have dealt with Mike Troyer over the years do indeed wish him well and wish fer a speedy recovery. He is a terrific feller and beyond smart.

MGD

 

I have long tubes with tunes written "for them" and my front O2s were moved much further down stream, and I've had zero issues with lean codes. If any of the additional codes are being triggered by the rear O2's, it could be related to the (hi flow I'm assuming?) cats not catalyzing enough.

If the shop welded their own bung holes for the O2s in, and the welds aren't completely sealed or very good, they could easily be leaking right there. That's what I would suspect because even folks with God awful exhaust leaks from warped manifolds tend not to get lean codes. Not that that sort of leak can't cause this, but it's not my top suspect.

Have you tried flipping the front and rear O2s? Or even getting new ones? It's common to damage O2 upon removal and/or re-installation, and the shop also may have thrown them around and damaged them.

Unless there way a problem with the tune before the headers, I doubt the tune is an issue. I think this is mechanical. Simply installing headers and moving O2 sensors around should NOT cause this. I know tons of people with headers on all sorts of makes and models and several have no sort of tuning at all with no issues.

 

Thanks for the replies.
yeah I had a nasty warped stock manifold. It was ridiculously annoying the last couple months, especially while towing and never threw a code. Im suspecting perhaps its as simple as an O2 got damaged as Kmac suggested and hopefully not a tune issue. ive been extremely happy with the truck since Mike did his magic almost 2 years ago. I just swapped the O2s. Will follow up on results. thanks again.

 

Oh, another thing actually: check the O2 extensions!! I had a lean code because my O2 extension on the driver side wasn't connected properly the first time. But that's all it was and it went right away as soon as I plugged it in again. Check the solder if they were soldered on because that has a tendency to melt.

Hopefully you figure this out soon!

 

Thanks for the replies gentleman. I did check the harness as well. Man that upper plug is a pita to get to. But, it was a faulty O2. I did not have new ones installed and guess I probably should have thought of doing that. The uptreams have never been replaced and have 103k on them. When it threw a code 10 minutes after picking it up from having the LTs installed I just assumed it was a tune issue.

Its running great now. have had it out 3 times to run errands and the CEL is gone. I reloaded the street tune last night (off the bad gas/ tow) and its perfect.

BTW as a side note, the guys at the shop said it was their first install of Dynatechs on the 3V 5.4 and was by far the best fit they had seen. They have done a few other 150s 04-06 w/ different brands and said none fit as nicely. They seemed quite impressed.

Thanks again

 

Hi.

Great news!

Thanks fer that - it's very nice when folks bring their threads to closure. Much appreciated. It's unfortunate that most do not.

Did you use Motorcraft O2's? ( or Bosch as an alternate )?

Whenever VMP fixes their forum link I'll shoot it to you - it's a good read.

Cheers
MGD

 

Agreed, that drives me nuts too. "was it fixed, yes, no, blew up? what happen?"

Of the three local parts stores in my "new" home town, no one had them and I didn't feel like driving the 50 mile round trip to Ford yesterday. So I did go with a Bosch for now. If need be Ill change it later. ive got a buddy that has an acct at Ford that I can usually get stuff at his dealer cost.

Whats the reason for not recommending the Bosch? I had been told by some friend mechanics that its what they usually use without problem. Just curious.

 

Hi.

Justin @ VMP (owner and lead tuner), did some comprehensive testing a while back, datalogging an OEM MC O2 against a Bosch replacement. The differences were vast - the Bosch unit was very slow to heat up and the switchrates lagged significantly behind the OEM MC part. Hence - MC is all he will use.

It may well be that Bosch makes the MC O2's, but to a different standard - akin to the Motorcraft versus Autolight plug scenario - both made by the same company, but the MC parts being demonstrably superior and much preferred in a modular motor.

Bear in my that VMP runs a perf shop and does a lot of highly stressed boosted applications - in those cases the response characteristics of the MC O2's are crucial to help prevent engine failures. Boost is unforgiving to A/F errors. For Everyday folks with normal trucks it's likely one would not notice much difference.

I'll send you the link when it's back up.

Cheers
MGD

 

Good to know. Thanks for the info. its nice to hear real world testing had been done to show it rather that a "well my brothers uncles nephew said theyre better"

ll get it swapped out asap since im in a boosted scenario.

thanks again for all the help and info and look forward to the VMP read.

 

Class act MGD! Always learn sumfin' from ya