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Thanks for that. So far I have only managed to get through a 1/10 of a tank and oddly enough the fuel gauge is now accurate again that damn thing has not been right for years it was always way past F when full. I mean by about a 1/2 inch too far right. And now…it’s dead nuts on:thumbsup...

Jim, How long did it take when you preformed the above to have any affect? Thanks -Dog

I have GMTDScan basic will this work or will I need to upgrade to GMTDScan tech version? Thanks Again -Dog

Hey thanks it can' urt to try... Beats the cost of a new OS or IP. Thanks -Dog

OS or the whole IP? I did a fair amount of searching to day and managed to get an email off to SSDiesel Supply I had asked where in California I could get a OS for a good price. The following was his responce. Hi, The optical sensor is NOT something you can replace in the field. It...

Thanks Jim as a matter of fact I saw where you posted it in a previous thread. he did a great job:thumbsup: Thanks Aaron

I geuss that I am a little dumb here but why should I mix 2 stroke oil with my fuel and will that be somthing that I will need to do all the time? Thanks -Dog

I check again to make sure there is no air or bubbles in the return from the IP. I put clear 1/4" tubing on it long enough to see it while I reved it up and no air at all. Thanks -Aaron

When these things fail, what happens do they go blind? Is there a way that I can cleen it without taking it out? Or did the pump have problem and the optical sensor was damaged as a result? At this point it starting to make better since to replace the whole pump. The best price for a OS...

No should I? I for the for the most part have always thought that that stuff is nothing but snake oil. I just keep on replacing the fuel filter often and try to buy fuel from a name brand station. Thanks -Dog

Well just for sh!ts and giggles I tried it with the optical sensor unpluged all together and now the truck fire up with the SES lamp on every time and runs like my post with the SES lamp on. Meaning the idle is high 750 and the truck runs smooth. So that must mean that I have a bad OS. Now...

Optical Sensor Part# Arrrrrrrg:rolleyes5: I can find a part number for the optical sensor anywhere. Does anyone know what the freaking part number is for these? Thanks -Dog

Can you run the truck without the optical sensor? what harm will come of it? Thanks -Dog

I am a dumb a$$. Sorry OS=optical sensor. my brain farting head was trying to think it had somthing to do with oil switch. Sorry about that. -Dog

Hi AK:thumbsup: xjbry mention that I should give this forum a try. he said that there are more Diesel Experts here. Dont know now if its ture or not but it can't hurt I figure B4 I shell out the money to buy a new IP. I think I am leaning more in the direction of the Optical Sensor. I...

Yes the fuel supply is tiptop as far as I can figure. What is the "OS" and where can I find it? The timing chain is OEM and never has been replaced. My question however would be if it was the timing chain or a broken IP shaft that would be mechanical, and in that case woud'nt the truck run...

This is what I get when the SES lamp is on. Please disregard the title of this post. This is what I get when the SES is not on. After shutting the truck down and waiting about ten or so, I started it again and this time no SES lamp and cant hold an idle. So I got these readings from GMTDScan...

I replaced all the batt cables with new ones and charged the batteries. hit the starter and crossed my fingers. after about 20 seconds nothing. One thing though when I turned off the ing switch the clock stayed on, with the key out. So, I gave it a few seconds and tried it again and after about...

Hello All, I have posted this @ TDP forum and have not had too much success. One of the members had mentioned that I should try posting it here i might get better luck. I have been racking my head on this one. The truck was running just fine and I got the normal symptoms that the PMD was...