DTC codes 35 and 36

[Foehammer]

Hi Guys need some help my 94 chevy k1500 was having some issues today I put some Lubro Moly diesel purge in my tank yesterday and today I drove about 200 miles and about 15 miles from home i pulled off the road to get something out of the back and when i got back on the road and up to speed it started lagging and wouldnt go above about 1200 rpm and go faster that 45 mph for about a minute and did this intermittently for 5-7 mins and then drove normally. i stopped at the fuel station and refueled (I was about a 1/4 tank) and left the engine idleing while i fueled and it died and started back up when i pulled onto the street and was stopped at a light it died again when i got home i cheked the codes and now have codes 35 ( Injection Pulse Width Error (Time Short)) and code 36 ( Injection Pulse Width Error (Time Long)). Any one have any thoughts or suggestions?

 

[buddy]

Its probably your optic sensor getting messed up by that dark red stuff you put in, must be "blinding" it. You can try diluting it with more fuel. Its going into limp mode because of it.

the 6.5 electic IP is a little more sensitive to additives than most other vehicles. I have had no issue using ATF, 2-stroke oil, Power Service, Diesel Power, and others without any issues. It is very important to not have cloudy fuel, or any water. What is in that Lubro Molly Purge? Maybe there is something funky in your tank that the purge stuff cleaned off the bottom of the tank and cloudied it up. You might want to empty the tank, and drop it and check.

Also, are you running any WVO or Bio?

drain some fuel from the filter assembly using the drain valve up front and jumpering the lift pump and see what it looks like.

 

[Veg_Out]

This was the codes I had when it was time for a new IP. I think I could have salvaged my old one by replacing the optic sensor.

I wish I'd tried.

Do you have good fuel pressure? With a gauge?

 

[JiFaire]

I agree with both above...WTF is "Lubro Moly diesel purge"?????

Most people with those codes start putting in 2-stroke motor oil and powerservice white (8 oz of each) per tank and the codes go away.

I think perhaps the gunk you put in caused some OS issues, as Buddy suggested, and maybe you can run some fuel through it to clean things up.

I would start by changing the fuel filter; pour 1/2 cup of Seafoam in the filter manager, put it back together, bleed the air and start truck.

But I'd want to get some clean fuel in your tank, too. If the problem foes away and then comes back, you know what to do.

 

[JiFaire]

Never mind; I found the stuff.

http://www.worldimpex.com/parts/lubromoly-diesel-purge-16oz_60869.html

My advice stands, When you clean gunk out, it has to go somewhere. In an electronic 6.5, the only additives I recommend are stuff that is SUPPOSED to burn.

 

[Mudbath]

Were there any codes before the additive? Might be cleaning crap out of your fuel system and it is plugging up your fuel filter. Or it is cleaning the pump to clean (squeeky clean) and there isn't enough lubricant, Might want to try a liter of SAE 30 non detergent motor oil in the fuel tank to get the lubrication back up.

 

[buddy]

I looked at the Molly Purge and it has "solid lubricant" similar to graphite, which might be clinging to the hoses and IP and Optic Sensor, so you might have to run another cleaner through it, or actually remove and clean the Optic sensor or replace it.

There must be someone else that has put it in a 6.5TD before, but I cant find any other references. The applications that Ive seen listed are all smaller diesels from Europe, which probably do not have an optical sensor. You have to buy it from specialty European automotive shops.

 

[Foehammer]

The lubro moly i got was from my local napa auto parts and was recommended by one of the guys behind the counter. I didnt think about it cleaning the crud from my tank and pushing it into the IP and engine. i will try the seafoam in the filter bowl and see if that helps as well as possibly a new filter. Hopefully i didnt permanentlly f-up my OS or IP. When i put fuel in last night i put 8 oz of powerservice grey w/ cetane boost plus 12 oz of lucas upper cyclinder lubricant in ( i didnt have any 2 cycle at the time). I have also heard of putting 1/2 cup of ATF into the filter bowl and to clean the OS followed by 2 cycle engine oil in the fuel tank for lube but I didnt think ATF would be good for the IP any thoughts?

 

[Foehammer]

I looked at the Molly Purge and it has "solid lubricant" similar to graphite, which might be clinging to the hoses and IP and Optic Sensor, so you might have to run another cleaner through it, or actually remove and clean the Optic sensor or replace it.

There must be someone else that has put it in a 6.5TD before, but I cant find any other references. The applications that Ive seen listed are all smaller diesels from Europe, which probably do not have an optical sensor. You have to buy it from specialty European automotive shops.

That'll teach me to listen to the parts guy:Flush:

 

[buddy]

Well it was only a theory, but I wouldnt listen the parts guy either way unless he owns a 6.5. Not even GM diesel mechanics know anything about the 6.5.

 

[Foehammer]

Yeah but your theory makes alot of sense

 

[Mudbath]

If it is something clouding the fuel and causing optic sensor problems I would refrain from adding more dyed additives until it really clears up. The SAE 30 lubricates but doesn't have the dye. I use to use 2 stroke oil but heard the dye can cause optic sensor problems so I switched to the SAE 30 non detergent oil, and it is cheaper too.

 

[buddy]

The reason I use 2 storke is that it is meant for combustion, but I dont know how SAE30 does with that. I would think SAE30 would leave deposits when burned

 

[Bullseye240]

That'll teach me to listen to the parts guy:Flush:

Sounds like he got a "counter guy" not a real "parts guy". Now they just hire someone and teach them to run the computer and thats about it. I go in sometimes around here and try to talk to them about what I want to do and they have no clue what I'm getting at. I have found that if I go to an actual truck shop counter they understand what I'm trying to do. Had to do that when I installed my Walbro and prefilter to get the right parts. It's a real pleasure when you find an actual parts guy.:thumbsup:

 

[JMJNet]

DONOT put ATF. It is red and it will mess up your Optical Sensor.

Listen to Jifaire.

 

[buddy]

Are there any threads about ATF killing an optical sensor?

It never killed mine or caused a hiccup, Ive used it a few times. Doesnt mean it cant, Im just wondering if there are some specific cases of it happening.

 

[Goldsburg]

The reason I use 2 storke is that it is meant for combustion, but I dont know how SAE30 does with that. I would think SAE30 would leave deposits when burned

And to that end, I ALWAYS use a TC-W3 rated oil. This is a "cleaner burning" 2 stroke oil and its ashless...

Regards,

 

[JMJNet]

Are there any threads about ATF killing an optical sensor?

It never killed mine or caused a hiccup, Ive used it a few times. Doesnt mean it cant, Im just wondering if there are some specific cases of it happening.

New ATF have a lot of additive for modern transmission and it does not burn as cleanly as 2-stroke. The good news is the transmission is now more reliable because the ATF last longer and better.

 

[Slim Shady]

And to that end, I ALWAYS use a TC-W3 rated oil. This is a "cleaner burning" 2 stroke oil and its ashless...

Regards,

X2 on that and I see a .5 mpg improvement in mileage using 2cycle oil. TRUE story.

 

[Foehammer]

Ok guys here is an update- I put powersevice diesel kleen and 2 cycle oil in on monday it stalled on me twice on monday so for sh*ts and giggles I took my FSD and retorqued the mounting bolts- no stalls since then (fingers crossed). Today (weds) I got a code 36 but no noticible change in performance I think my next step is to get some Seafoam and put a 1/2 cup of it in the fuel manager as Jifaire suggested (I have not done that yet as my local parts store was sold out) If that doesnt work I will attempt to rremo0ve and clean the optical sensor, but I may need some of you guys advice on how to go about that as I am a :dr: