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Old 10-06-2013, 02:56 PM
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wastegate sticking open?

1st post/question. been reading up on here for quite a few weeks but ive ran across a question and im not sure if its normal or not.

i have a 2000 2wd limited im using for towing a 27 foot toyhauler that is roughly 7k pounds. when shifting, the wastegate sounds like it stays open long after it should. i have to get off the gas to get it to close. as soon as it quietens down everything is back to normal. with the whistle of the turbo, etc.

i owned a 99 f350 dually years ago and it never sounded like this. is this normal or do i need to check/replace the wastegate? if its not normal, how would you test it to see if its sticking open?

under normal everyday driving the truck sounds fine, but im not mashing it to the floor allowing it to really spool up like i do when towing.
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Old 10-19-2013, 05:50 PM
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the wastegate opens at 7-8 psi and you will never hear it open.

you are either hearing an exhaust/boost leak, turbo surge
or possibly air coming back out of the intake if you have an aftermarket intake.
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Old 10-21-2013, 04:49 AM
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thanks. stock intake on the truck so ill double check all my connections on the outlet side of the turbo. not turbo surge. have heard that many times before and this isnt the same.
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Old 10-21-2013, 04:25 PM
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You will never hear a wastegate open on a 7.3...

Do you have gauges?

What your explaining is turbo surge, without a doubt.
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Old 10-24-2013, 03:38 PM
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here is a short vid that i took this morning towing the toyhauler. i stay in the throttle after it shifts into od. you can hear it woooosh until i get out of the throttle. as soon as i get out of the throttle, the whine of the turbo comes back.

i dont have gauges installed yet so im not sure if im actually losing boost while i stay in the throttle or not. all of my hoses look good. dont think im getting any leaks.

VID 20131024 100342 on Vimeo
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