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Could something as dumb as a.............

Add some 2-stroke-oil to your fuel tank with every fill up.
Ratio 1:200

But the fuel cap could be the problem also. If you leave it loose, did the codes come back ?


Cu,
Sven
 
Thanks for all the replys. Yes there is a bit of vacuum when I crack the cap. I´ll run it today with the cap loose and see if they (codes)return. If so I´ll clean up the fuel solenoid connections and see if that works. Will report later. Thanks again g
 
I had a ton of problems with my suburban because the previous owner put on a locking gas cap right before I got it. It would create such a vacuum that the hose going to the tank would be sucked shut. I had problems with the truck missing, stalling, and hard start. I went to Napa to get a true "diesel" cap and got another "gas" cap. I drilled a hole in it and it eliminated the vacuum, but then I was spilling fuel through the cap (only drilled throught the check valve, not all the way through, but still leaked). I ended up taking a cap off of a ford diesel that was being scrapped and put it in. At the same time I did this I also cleaned all the grounds, so I'm 100% sure which fixed my problems, but I'm leaning towards the cap.
 
Well I drove around with a loose cap and am still getting a 35 code. I figured that would be way to easy of a fix. Mightygiving is it the fuel shuttoff solenoid that you refered to? If it is it looks like I´ll have to pull the turbo intake as I can´t get my hand down there. Chevylover is the 2 stroke oil a reccomendation to remedy the fuel shuttoff solenoid or for something else? Thanks for answering this rookies questions. g
 
The 2-stroke-oil is made for burning and lubricating an engine, so there is no problem with. It lube the IP, the injectors and the liftpump also. In a lot of situations, the adding of the 2-stroke-oil cured the code 35/36 fault. Not evry, but a lot. the newer ULSD fuel is not the best for our older engines, IP, etc. It dont lube the component as good as the older fuel. So due this lack of lubriction, it COULD the codes you have. You should give it a try and run 2-3 full tanks with an added ratios of 1:200 and see if the codes come back.

I add the 2-stroke-oil in EVERY tank here in germany, cauz of the fricking ULSD fuel.


Cu,
Sven
 
Thanks Sven. I don´t think we have ULSD down here in Mexico but it can´t hurt to try the 2 stroke oil. I still have a gallon of it in the garage leftover from my 2 stroke outboard days (upgraded to a 4 stroke). I´m terrible with ratios but I thought I read a litre to a full tank (42 gals)? Thanks again g
 
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