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Good question, as the strange crank\cam\IP timing procedure seems to cause much confusion - we get the strange version because the DB2 was designed for an all-gear timing train, where the IP shaft rotates CW - our timing chain results in CCW shaft rotation - yep, that's right: while there is one...

So, let's talk a little bit about Limp Mode - and just fyi, kiddies: Sildenafil citrate won't even help here........... To wit: the much-dreaded oft-feared Limp Mode, or, more formally, Limp Home Mode, is resulted when PCM senses over-limit, under-limit, intermittent or erratic response from...

Bring it on, y'all...................

FYI: feel free to ask questions in the Q&A thread down in the main forum - I'd like to not dilute this thread any more than necessary - significant topics will be appended, here, with reference (credit or blame) to the topic starter or query-meister - we can take this down to sub-atomic particle...

In the "tranny", of course - Cylinder imbalance codes occur only at idle - PCM manages idle on a per-cylinder basis, measuring angular velocity of the OS timing tracks in the IP to determine if crank is speeding up or slowing down, metering less or more fuel to compensate - this is how idle...

Ok, no baling wire or such - trace your wg vacuum hose back to the source............. And, that's not a good idea, pulling the IAT sensor outta the intake plenum - now it senses ambient engine bay temps, should be directly in intake plenum to sense compressor outlet temps, very important for...

Here is the rest of the parry and riposte, in hopelessy inverted and possibly non-sensical format, all for your reading enjoyment: Ahhh, this explains why my 4WD doesn't work. I connected the reservoir line to the vacuum line and now the turbo actuator bar doesn't move, as it shouldn't, when...

FSD can cause DTC35, but is more apt to cause DTC36, as is poor connection and low battery voltage Try increasing fuel viscosity with some good ole dino 30, a quart per full tank - 'course, if it is an air leak between tank and lift pump, denser fuel will result in even greater air intake...

And, just to really piss everybody off, gasoline is also a fuel...............

Try cleaning the ground (and signal) connections, as mentioned And remember: a Diesel-engined vehicle requires Diesel fuel, not gas - it has a fuel tank, not a gas tank - you look at the fuel guage, not the gas guage - you stop at the fuel station, not the gas station - you fill up at the fuel...

Anybody see this thread as "closed"?

The firewall-mounted piece is likely the EGR sensor, or the Baro sensor with "F" engines (they look alike) - the vac resevoir plumbed into the circuit would seem to indicate you have the "S" EGR engine, the other ends going to the pump and the EGR vent solenoid - you should have three solenoids...

Unfortunately, oil is the fuel of choice for this engine - adding oil for the compression test can result in that cylinder, and any others having been squirted, firing as normal - primary reason for the cautionary do not add oil during compression checking blurb on line 7 For the cover in...

Cruise won't work with most DTC's - I notice new injectors ~21kmi ago - what about the IP???

Matt, no stock GM 6.5 will Boost any more than 7-8psi max - he's still not giving the information needed to diagnose his symptoms - what has been done to exceed factory limits? There is either turbomasters, vacuum bypasses, bailing wire, or lawnmower springs on those turbos - whatever - most...

Vacuum at full load indicates insufficient supply volume, which could be the off-the-wall lp, or leaky fuel lines between the sock and the lp, or both - that lp is rated at 10-15psi @ 20gph, so seems like it should handle the load - oem is 4.5psi @ 15gph - 15gph @ 60mph is 4mpg

That is a vacuum reservoir off a gasser (patooie!), back when they had vacuum-operated hvac systems - no possible connection to the 3-wire electrical OPS - possibly someone was trying to compensate for a failing vacuum pump, which operates EGR and Boost systems BTW - welcome to the...

Ok - you need to go out, pop the hoods and take a look at your turbos, describe what you see on both trucks - better yet, a pic is worth a thou...........well, you know............ For starters, the EGR valve on 1500's is calibrated for that oem 7-8psi Boost limit - Boost in excess of 10psi...

No use tossing out hopefully-lucrative ideas vis a vis electric fans being better than the oem stock fan A - loaded Diesel engines put out three times the BTU of an unloaded engine - equiv displacement gasser engines (patooie!) cannot even come close to that - this Diesel engine has specific...

What have you done to the factory Boost system to get more than factory Boost? Your sig indicates nothing..................