Once again Block the flow in a vacuum hose that goes to a manifold, not pull off. If you block it then You surely have no leaks through a vacuum hoses, right? If that helps it means You had a leak into the hoses, if it does not - it means vacuum lines are ok.

 

Plus, if the air leak is significant, the idle RPMs are going to increase or even surge on starting.

 

Shrtft1 1.6 shrtft2 2.3. LONGFT1- 9.4 LONGFT2 9.4 at idle (940) at 2500rpm shrtft1 -0.8 . shrt2 0.0. LONGFT1- 7.0 LONGFT2 7.0 thank you for your time and in put I hope this is what you askef

 

Do you have the short term fuel trims that go with the numbers in your first post?

George

 

Shrtft1 0.0 shrtft2 2.3 thank God I took pictures of all that

 

MAF(lb/s). 0.02. Does that mean anything bad?

 

Our MAFs are measured in grams per second. There's probably a conversion you can use. I never have. What is the IAC counts (or %) and the TPS angle at idle?

 

MAF readings are usually stated in grams per second. At idle, that number should be around the displacement of the engine or 4.6 g/s ish. The stated amount in pounds per second is too coarse for a useable conversion. This is only a general rule of thumb and more diagnosis is required to properly assess the MAF sensor function.

Your fuel trims (LTFT+STFT on a given bank) have changed dramatically. Have you changed anything on the truck to account for this? Also please restate all 4 fuel trims from both measurements with plus and minus signs on every number. I cant tell if the "-" marks are punctuation or negative numbers and if the lack of a sign means positive numbers.

George

 

As far as drastic change in the fuel trim numbers I cleaned TB changed all vacuum lines as far as new # shrtft1 -0.8 LONGFT1 +11.7. shrtft1 +1.6. LONGFT2. +13.2 I changed to metric on scanner and got MAF 8.6 g/s rite at 890rpm

 

I'm using a cen-tec 60794 obd11- +abs and I can't find anything on there about AIC but the TPS is 0 % at idle