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Vacuum Leak Problem?

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I started my truck up as normal yesterday morning. When I drove off I noticed a brief hesitation and loudness in my exhaust. Just for a brief second or two!I tighten down all of bolts to my new intercooler boots and a couple of them needed to get snugged up.I scanned for codes but found none. I have a little leak coming from my canister but that was there before this happened.Where else can I look?Any help would be appreciated.Thanks,Steve2000 6spd. stock 270k

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  • Owner

Hmmm... How's the fuel pressure? How's the fuel filter? You might consider building a boost leak cap for the turbo and pressize the system to 20 PSI and soap the system down looking for bubbles.

  • Author

Michael,The fuel pressure is great!I need to finish building this vacuum tester to check her out for any leaks.I can duplicate the noise if I stay at a low speed with a higher gear and accelerate a bit. The is exhaust noise only there for a second or two.Steve

Have you checked the exhaust manifold and gaskets for cracks or blown out gaskets also check the turbo and make sure the wastegate isn't stuck open.

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    • Author

    I think that would be a good idea. I have not done that yet.I guess for the cracks I would be looking for any discoloration from the manifold right? Could I check the wastegate by putting a little air to the turbo hose inlet?Thanks for your feed back.Steve

    • Owner

    I think that would be a good idea. I have not done that yet.

    I guess for the cracks I would be looking for any discoloration from the manifold right?

    No there wouldn't be discoloration... It just air that passes through there...

    Could I check the wastegate by putting a little air to the turbo hose inlet?

    Yes... Build a cap and put a air chuck fitting in the the cap and hook to a air compressor with a regulator set no higher than about 20 PSI. Then soap the whole system down look for bubbles... MAP & IAT sensors, manifold cover, intake elbow, boots, intercooler, etc.

    Thanks for your feed back.

    Steve

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