Got these today, any guesses on where to start ?

P0101 - Mass air flow circut out of range.

P0236 - Turbo Boost senser #1 out of range.

Thanks

MAF sounds like EGR related. Turbo/WG sounds like the two are related with vacuum problems.

you done any tweaking or bypassing, or just mods listed in sig, does sound like a vac problem, MAF could be coding due to incorrect airflow across it for a given rpm, from low boost, actually for the MAF it would be low suction flow across the sensor, do you have heavy black smoke and poor acceleration?

you done any tweaking or bypassing, or just mods listed in sig, does sound like a vac problem, MAF could be coding due to incorrect airflow across it for a given rpm, from low boost, actually for the MAF it would be low suction flow across the sensor, do you have heavy black smoke and poor acceleration?

Only changes so far are K&N in the stock AB and the 3" straight pipe, looseing that plugged up converter helped alot :)

And as for the black smoke and poor acceleration ?, well yes that WAS me you were following :eek: :D , after approx 1/3 peddle I get some smoke, going WOT from low RPM really backs off the tailgaters :cool: but of corse I do know thats too little air or too much fuel and needs to be corrected, only had her a week, first tank yeilded 20.3 mpg (no towing and only a few burnouts) and starts fast, so I don't think I've got leaky injectors I believe the wastegate is staying open too much / long.

I've been reading/learning from the posts and trying to decide if I'll replace the S ECM with a F or an aftermarket box, manual wastegate controller or vacume, the EGR will get blocked, boost will be limited to 12, PMD will get moved/cooled, and the gauges are a must, not have ever seen "normal operation" of a 6.5 TD makes trouble shooting / modding a longer than usual process, but with the help of this forum I'm catching on.

Only changes so far are K&N in the stock AB and the 3" straight pipe, looseing that plugged up converter helped alot :)

And as for the black smoke and poor acceleration ?, well yes that WAS me you were following :eek: :D , after approx 1/3 peddle I get some smoke, going WOT from low RPM really backs off the tailgaters :cool: but of corse I do know thats too little air or too much fuel and needs to be corrected, only had her a week, first tank yeilded 20.3 mpg (no towing and only a few burnouts) and starts fast, so I don't think I've got leaky injectors I believe the wastegate is staying open too much / long.

I've been reading/learning from the posts and trying to decide if I'll replace the S ECM with a F or an aftermarket box, manual wastegate controller or vacume, the EGR will get blocked, boost will be limited to 12, PMD will get moved/cooled, and the gauges are a must, not have ever seen "normal operation" of a 6.5 TD makes trouble shooting / modding a longer than usual process, but with the help of this forum I'm catching on.

Okay you have splained why you are getting codes, no WG function, do a total vac system check, 1st look for base vac from the pump, should be about 15-20 at idle, check at main line feeding solenoid bank, then tee in to the outlet of the wg sol to line going into WG actuator while driving (make sure remote line to test vac gauge isn't pinched deadheadding the vac reading) that should fluxuate 15-20 as WG gets commanded to close WG for more boost, if not I suspect a bad WG sol, a common fail item, somtimes a little WD-40 into the sol vac ports will free it up. Check those things & report back. A S vac system is a little more involved than the F.

Go to FAQS tips for more power most of what I wrote there is what is on my S/F truck which is WAY more capable than what it came with. For temporary more power you can upgrade to a stock F PCM from junkyard (Max fuel rate goes to 63mm from 56), until you can afford a PCM reflash, will give a power bump, while still being protected from agressive fuel/boost the engine in stock form isn't ready for. Plus the junkyard F PCM becomes the core PCM so you can still have your stock one for emissions checks & troubleshooting later if need be.

Bill does not like to flash a S to F, he tends to flash to existing VIN as there sometimes are vehicle year specific updates to PCM, that may cause problems if trying to reflash using the donor F PCM's VIN. The S PCM reflash isn't a shabby mod, I'd do airflow & longevity improvements 1st, and flash later, unless you need max power now, just remember IC or some other form of post turbo cooling is necessary to get max benefit from additional fuel/boost.

That black smoke is unburned fuel=high EGT=death to the engine, if you don't have them yet gauges IMO are one of the high priority things to add before doing anything that adds fuel or boost.

Thanks for all the info, I'll start checking the vacume maze, I hooked up a hand vac pump to the turbo yesterday and the wastegate closed smoothly with the first squeese so I guess the mec part is OK

The sticker schematic if you still have it in engine bay is accurate, work your way back testing as you go but WG sols are common fail items, sometimes revived as splained above.

Well, finally got my vac gauge / tester back.....................

Vac @ 500 rpm idle..........17in, smoothly rose to 23in @ 2000 rpm, this was checked at the main plastic (brown) line going to the front most solenoid (which has a line teeing to the other ones and to the WG).

Removed that little Delco Remy solenoid and WD-40ed it, replaced and found no vac signal at the WG at idle - 2500 rpm, this was while in park.

Anyone know the volt / mil volt that activates this solenoid (I'd guess the only way to test)

Replaced the WG solenoid and now have vac to the WG, man these things do run better with the turbo working :D

Still was black stacking @ wot, pulled / plugged egr vac line and that stopped the smoke, it set the ses egr vac code but thats liveable for now. :cool:

Now for the PMD, ECM mods I'm trying to pick between Kenndy, Heath or SS :confused: and input on pros, cons, support or other will be appreciated. :help:

Got a Heath one myself, Love it. Kennedys/Westers reports look good also

Thanks TD, anyone else ?, why one is better than the other ?, dyno or seat of pants feeling ?, or ?, chime in here.

Price mainly, to date no quantitative comparison done one vs other, Heath advertises theirs as a towing enhancement, others say more for performance I don't know any apples to apples comparison done yet same truck different vendor PCMs

Well SS claims 80hp 160tq with their combo, Heath claims 65hp 150tq gain (wo injectors) I wondered if anyone has tried/dynoed and backed these gains up.

In FAQ the gains listed were MUCH less. soooooooo ?

What I believe they are talking about is at flywheel gains, I'm doubtful though of 80 Hp claim, dyno runs are rwhp, MANY variables go into a dyno run, my last one with all bells and whistles in my sig I was just shy of 200Hp rwhp, figure 40-60 Hp loss across trans & gears I'm guessing about 250 hp more or less at flywheel on mine.

I still have my stock S PCM, a stock F PCM and my reflash and have intened to test against each other, dyno days usually don't lend themselves to playing with different configurations, they usually try to fit in 30 trucks or so in a day with 3 runs each plus set up time to strap & unstrap down the truck and set up the tach trigger not much time to play.

For a non dyno day charge is $85-150/hr depending on the shop to play, that is a lot of coin I can better put to use adding upgrades and doing seat of pant and measured distance runs for improvement gauge. Not wholly scientific, but time & max speed from a known point A to B with same load setup on your own truck you will be able to self gauge gains or non gains.