ok so its pulling about 8" of vacuum all the time at idle. no fluctuations, no spiking and no idle or drivability problems. plugs look great, not using any oil, not blowing anything out of the dipstick either and no intake leaks. the vacuum has been verified with logs but doesnt seem to affect anything that i know of (not sure about power). what gives?

 

Wow that is strange.. Has it affected anything at all with the truck??

 

not one single thing! lol i dont know what to think. it has been this way now for about a year or more

 

Roll with it lol.. I'm guessing its one of them ''if it isn't broke don't fix it'' things.. I mean wth can you do if it is running the way it should

 

Thats with a stock cam? Ever do a leak down test?

 

yeah thats what ive been doing but its got me wondering wtf, and I hate when I cant figure something out lol

yep stock cam, correct me if im wrong but is there any reason to do a leak down if i am not having any vacuum fluctuations, no loss power, plugs look perfect, no change in idle and operating quality? I would think that if I had that big of a problem it would show up in one of those things?

 

I agree to one extent however something is not right for your vac to be that low. How are your breaks? What MAP is it idling at?

 

thats around 77kpa, right?

does it go up a couple when you put it in drive while ideling?

 

Could there be something wrong with the gauge? Maybe test that...try another known good gauge in it's place. You should have at least 17 mmhg with the factory cam at idle btw...

 

Breaks are great, the MAP is around 6-8"
yep it gains like 1-2" vacuum

I wish lol, that would make this much easier. It has been verified with the MAP sensor reading on HPTuners