98RedBird

iTrader: (77)

Trying to look for a possible vacuum leak... Just did pacesetter LT's and TSP duals. Checked Vacuum at rear of manifold and had a steady 18". Car has a stock cam in it, I don't know if that's a tad low for these cars or not. Most cars the range falls within 18-22...??

Not sure if these cars run on the lower end of that?

Thanks

BaddBird

iTrader: (6)

Did you have the car tuned?

gearhead1186

iTrader: (8)

ur right that 18-22 is about the average. 18 is kinda low for a factory cam/tune but I wouldn't drive yourself crazy.

98RedBird

iTrader: (77)

No, no tune. Stock tune. Does it matter where you check it? I just grabbed one of those real tiny vacuum lines that run to the HVAC controls...? Also, this was taken on a engine that was not fully warmed up, just started it and hooked the gauge up. I think you're suppose to test on a fully warm engine?

I also heard that your vacuum will vary depending on DA? Not sure if that's true.

gearhead1186

iTrader: (8)

get the car to operating temp and then try and pull vac off the intake manifold.

98RedBird

iTrader: (77)

Well it was off of the intake manifold. It was just one of the small lines that "Tee" off of the rear of the manifold by the MAP sensor and control the HVAC on the interior. Can you use those small lines to test Vacuum? Or is there a better place to do it? The only other place I see is the Brake booster and that line is huge and would take some work to get it to work with the line off of my vacuum gauge.

HotSilverBird

18 is fine, best way to find a vacuum leak is to use a unlit propane torch. Just open the torch and run it all over everything, if you have a leak the propane will get sucked in and the engine rpm will rise up.