96 chevy 3500 dual wheel ext cab 2wd 4.10 she runs and good and im burnin 10-15% wvo now the problem is when shes hot the glow/lp will short cycle i have to crank it for a while to start which throws a code that kills my cc.when its cold np starts normal code dissappears after a few normal starts.when she runs without the lite its quiet and balsy with the code its louder and very fuel inefficent this has been goin on for a while before i started runnin wvo...motor/turbo was replaced before i got the truck id got like 50k on it 155 on the truck i love my 6.5 and it runs for what it is but i really am goin nuts...i can handle any repair so just let me know...thanks-Jim

What code? Optic sensor or fuel silinid problem maybe? Let us some numbers. . .

The short cycle could be a weak connection between the batteries and the terminals (typical). The funky code at startup sounds like CPS code or optical code giving you limp mode.

what code...is there a way i can read it i wont go to gm as theres a $90 fee...which is absurd for 15 seconds...i would be happy to spend the money on a cheap scanner if one exists..i will check the terminals on the batt...the batteries are 4 years old but she dosent have this problem when shes cold only on a hot start ie i go into the store for a few thanks-Jim
one more thing..over the winter sometimes i would turn the key no lp/gp truck was on lites radio ect sometimes the relay would buzz so i replaced it and cleaned and greased <electrical grease> a 3 or 4 pin plug and a round one which were right near ther driverside relay box against the fender since then,febuary, i have not had a repat of this sorry if im bein a pain i am reading thru the posts on the forum ...Jim

autozone reportedly checks for free. Other than that the option are to buy a scantool or software and scan it yourself.

where do you live? advance auto parts and autozone check codes for free.

westchester county ny i did not know that about autozone im gonna find one...is there a linkcable/software for a laptop outthere for a reasonable price if so what is it called..im goona go look for az and check my cables

Candian Rigger is using Auto enginuity and I think he really likes it. search for a thread called , I have a scanner now. As soon as I can save the coin that is what I am getting...

EDIT by Bowtie
ALSO Thread called Scan Tools by Canadian Rigger

ya i really like the laptop setup palm dosent look too shabby either i will be on my way to autozonemaybe wednesday or thurs...i was thinking is it possible theres a bad/shorted gp possibly aggravated by heat can i test them for resistance and if so what should the meter read...they were replaced prior to me getting the truck maybe im way off just thinking thogh

some of the replacement glow plugs out there don't heat up as hot as the old OEM and will start hard maybe the WVO is make it a bit harder to start and you need a longer glow cycle. I added the SS Diesel Glow Plug over ride a couple months back and now I just push the button to glow as long as I want after the CPU controller cycle ends. The kit is $70 and it took me about an hour to install the hard part was fishing the wires through the dash other wise I could have did it in about 20 minutes and I'm a clutz.