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How would I locate a vacuum leak? My cars been running kinda crappy and I ran the codes and got 33 for the egr. I yanked the vacuum line off the back/top of the valve while the car was running and there was like to vacuum. I did this same thing on my brothers gt and got lots of vacuum...?? I checked the routing of the lines and both cars seem the same, but wtf??
 

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Spray carb cleaner near the lines, and also near the gasket surfaces on the intake manifold and listen for the idle to change.
 

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Use STARTING FLUID.

BTW: Do NOT use propane.
 
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