Wastegate Question??? Help!!
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Elder User
Joined: Aug 2002
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From: South of you
Wastegate Question??? Help!!
Pulled the boat over the weekend. It weighs around 5000 lbs. loaded. I went further than normal and yanked it around 65-70 mph. When accelerating pretty steady, I heard what I believe the wastegate blowing off some pressure. It sounded like if was right at the firewall and made a stuttering/hissing type sound......sort of like a rattle snake. I was pulling with my tuner in the lower setting (SCMT 60hp mode.) Just for info, I run a 4" turbo back exhaust and the AIS intake. I assume I am getting plenty of air flow. I never noticed this before when I go to the local ramp, but when I get it out on the highway I get this. The last time it happened, I got a code....can't remember which one, but it was the one that said fuel over/under specified range. I cleared the code and never saw it again. What's the dang deal here. I am really losing faith in my "tuned up" diesel. I am considering throwing the SCMT to the scrap pile and just run stock. HELP!
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Joined: May 2001
Posts: 13,653
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From: Cabot, Arkansas
It's nearly impossible to actually hear the wastegate open, when operating properly it is almost always open. A malfunctioning wastegate might set a P1690 code.
Your description sounds more like surge/stall than an actual malfunction. Read up on some of the compressor surge threads and see if anything rings a bell.
Don't lose hope...once you get your "tune-up" dialed in it really is worth the effort. Some PSD's just seem to suffer more growing pains than others.
Your description sounds more like surge/stall than an actual malfunction. Read up on some of the compressor surge threads and see if anything rings a bell.
Don't lose hope...once you get your "tune-up" dialed in it really is worth the effort. Some PSD's just seem to suffer more growing pains than others.
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Elder User
Joined: Aug 2002
Posts: 656
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From: South of you
Originally posted by cookie88
It's nearly impossible to actually hear the wastegate open, when operating properly it is almost always open. A malfunctioning wastegate might set a P1690 code.
Your description sounds more like surge/stall than an actual malfunction. Read up on some of the compressor surge threads and see if anything rings a bell.
Don't lose hope...once you get your "tune-up" dialed in it really is worth the effort. Some PSD's just seem to suffer more growing pains than others.
It's nearly impossible to actually hear the wastegate open, when operating properly it is almost always open. A malfunctioning wastegate might set a P1690 code.
Your description sounds more like surge/stall than an actual malfunction. Read up on some of the compressor surge threads and see if anything rings a bell.
Don't lose hope...once you get your "tune-up" dialed in it really is worth the effort. Some PSD's just seem to suffer more growing pains than others.
