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DTC codes 35 and 36

coincidental codes, gotta love em. Is the black wire of the FSD harness grounded to the side of the heatsink? If it is, you should run it back to the top of the IP.
 
Sorry I havent update recentlly as I have been working my tail off the last week- I put some seafoam in the fuel manager and put filter back in and havent had any codes pop up yet (Yay):thumbsup:
BUT TODAY! I was at home depot and went to get into my truck and start it and the worst noise i have ever heard followed by the tinkling sound of starter mount bolts hitting the ground told me starter broke loose.Now I have to figure out how to get those Mutha F'ing bolts out of the block so i can replace them and I have to get the Starter bracket as well:mad2:
 
Ah, the old 'I didn't think I NEEDED a $7 starter bracket' problem rears its ugly head again...

Easy-out is your friend. Use NEW bolts, make sure you get the bracket.
 
Ah, great point. I thought that was implied, but yes, it's better to be sure. Thanks!
 
DTC 35 short and 36 long are resulted from several sources:

35 short results from frothy air bubbles in fuel, or air, as when IP totally evacuates itself resulting in low housing pressure - or leaking or cracked poppet valve = replacement IP

35 long results from dirty fuel, contaminated fuel, water in fuel, faulty electrical connection, such as the black ground wire supposedly attached to the top of the DS4, and Fuel Solenoid wear - also, poor positive voltage supply, intermittent harness connections from loose, oxdized\corroded, frayed wiring, etc - and failing FSD\PMD - or worn, binding shuttle\poppet = replacement IP

The DS4 does not have a fuel shut-off solenoid - the DB2 does have a Fuel Shut Off solenoid

The DS4 does have a Fuel Solenoid, driven by the FSD\PMD - the DB2 does not have a fuel solenoid, not driven by the NoSD\NoneMD

The DS4 does have an Engine Shut Off solenoid, similar to the DB2 Fuel Shut Off solenoid, but not

The Fuel Solenoid, driven by the FSD\PMD, is that large round device in the middle of the distributor, the large size full of enuff wire to move the shuttle valve in it's 0.005" travel, allowing internal IP housing pressure to fill the fuel charge chamber within the tiny injection event window at up to 2400rpm IP shaft or 4800rpm crankshaft, which would be (2400/60=40x4) = 160 injection events per second which must occur within 1/160 = 0.00625 seconds for each event - the large transistor drivers on the FSD\PMD and the large size of the Fuel Solenoid are indicative of the electrical power required to move the FS shuttle poppet that miniscule distance in that miniscule time - thus, the ~1.2-2.25ms allowable window for the FS valve to function to allow the pumping plungers to build up enuff pressure to overcome injector pop pressure, and we have injection - then on to the event for the next cylinder occurring in the next 1/4 revolution, and soasf, ad infinitum (hopefully!)

PCM sends the firing pulse thru the FSD\PMD - a 'nuther circuit in the FSD\PMD monitors the current applied to the FS coil, which varies according to the position of the FS shuttle - initial current is hi to get the shuttle moving from rest, tapering off as shuttle moves, then a 'nuther spike as the shuttle comes to a fully closed stop - PCM measures the time from the application to the stop, returns the value in milliseconds - if not within the spec'ed window, short or long, a DTC is set indicating poor performance - if short, not enuff fuel - if long, timing will be late

PCM measures closure time, compares to spec, cannot\does not reset if short or long, as it is a measured event, indicating demand injection quality vs actual injection quality - PCM does not set or reset Closure Time - that is a resulted timing event of the Fuel Solenoid - CT is variable within limits according to rpm and loading - other variation results from applied power and connectivity

Injection pressure in distributor and pipes is not allowed to drop to 0psi between injection events, as that would result in increased lead time, reducing max available rpm - IP housing pressure runs from ~35-125psi upwards, depending on rpm and load
 
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i would go to Heath and get a PMD cooler kit( 7 year warranty) ....it's going to die on you and then a tow bill....

BTW does your cruise control cut out when you get code 36?
 
gmctd- great explanation of IP operaton

ghitch75- no my powersteering still worked when the code 36 happened

I am pretty surte what happened was put a STRONG cleaner in with my fuel and it cleaned crud from my tank and that was causing the codes, I have since put Seafoam in the fuel manager and powerservice Diesel Kleen and 2-cycle oil in with my fuel and have not had any re-occurences

Thanks for all the help you guys this site rocks, it beats the heck out of DP for help
 
Foehammer said:
gmctd- great explanation of IP operaton

ghitch75- no my powersteering still worked when the code 36 happened

I am pretty surte what happened was put a STRONG cleaner in with my fuel and it cleaned crud from my tank and that was causing the codes, I have since put Seafoam in the fuel manager and powerservice Diesel Kleen and 2-cycle oil in with my fuel and have not had any re-occurences

Thanks for all the help you guys this site rocks, it beats the heck out of DP for help
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powersteering has nothing to do with it????????:wtf:......reread my post....CRUISE CONTROL!!!!
 
Cruise control, not even to be confused with power steering (say wha??????), will usually give first symptom of IP or FSD\PMD problems by either refusing to cruise, or dropping out of cruise with little or no provocation from the captain's helm - when cruise gets flaky, prepare to disseminate some dough...............
 
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Sorry was reading as post about pmd failure prior to this and last thing i read was powersteering so i guess i had it on my mind when i answered and no i havent been using cruise control when i got the code 36 so i couldnt tell you and last time i got a code 36 my fuel gauge said 1/4 tank but i know it was lower so i believe its from crud in the fuel I put clean fuel in and 2cycle oil no code 36 no limp mode
 
No prob, dude - being also somewhat of a frustrated stand-up comic, I seldom pass up a chance to play to a captive audience, whereupon most of my retorts........er.....responses are composed in some jest - worked well when teaching seminars, keeping the bored segment awake and semi-alert, particularly when an occasional occasion demanded a little gentle (yeah, right!) chiding - so, hang in there, grasshopper, and cruise in peace.......................
 
gmctd said:
No prob, dude - being also somewhat of a frustrated stand-up comic, I seldom pass up a chance to play to a captive audience, whereupon most of my retorts........er.....responses are composed in some jest - worked well when teaching seminars, keeping the bored segment awake and semi-alert, particularly when an occasional occasion demanded a little gentle (yeah, right!) chiding - so, hang in there, grasshopper, and cruise in peace.......................
Click to expand...

c'mon, JD, how many of the uninitiated young-'uns on here even remember that show? :D

"When you can take the pebble from my hand, Grasshopper, it will be time for you to leave." ):h

LOL... seriously, Master Po (our blind shaolin expert, here) is all over the correct explanation, as per usual. When your PCM registers a certain number of failure events within a certain time frame, (ie: in this case, 'failure event' = ct too short/long notices), then it sets a code (in this case, 35 or 36).

Noticing that something is wrong (PCM is a little dumb in this respect), it takes away autopilot and returns the vee-hickle to manual control, so the driver can take appropriate action. In other words, your cruise quits.

Shut the engine off, re-start it and the code disappears, your cruise returns like the Jedi and everything is fine again. Until next event.

When your cruise quits like right out of the blue and then mysteriously fixes itself next start-up, there is an expensive repair in your future, usually an FSD/PMD or an IP, 'cause there aren't too many other intermittent-failure items on these trucks.

To eliminate the others: make sure your fuel is lubed-up, make sure your fuel delivery is clean (filter, sock, no air bubbles, adequate pressure to IP), make sure your grounds are all good. Everybody should do those anyway, just to eliminate little gremlins.

Happy trails, Master Po.
 
Read thru the entire thread, this time.....or, interpolate - remember: it wasn't my truck that sat up for an entire year because I didn't know how to get it running...............:prrr::prrr::prrr::prrr::prrr::prrr::prrr::prrr::prrr:
 
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I have been in the thread since the start and it was not the OP that asked about cruise control. So its nice to have the extra info...but I was just saying. Is that some kind of insult?
 
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