Join Date: Mar 2012
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I notice that when towing our fifth wheel (11K lbs)up extended steep grades and the EGT's begin to climb ~1000-1100* with the boost somewhere between 10-12psi I sometimes hear what I can best describe as a chirping sound which seems to be coming from the turbo area or the intake. The truck runs fine, doesn't seem to lack power and all gauges hold steady, nothing fluctuates. If I let up a bit on the throttle it'll go away or if the EGT's drop down to say 900* I don't seem to hear it. Towing on smaller grades, 4-5% where my EGT's stay lower I just never hear it. All my turbo boots and connections seem tight, no leaks that I could find. I had a DP-Tuner previously and I heard it with those tunes too. Haven't done much pulling with it in stock mode but I guess that will be next. Never happens when not towing or towing on anything but the steepest grades.
Any ideas? Anyone heard this before?
Thanks and regards,
2000 F350 7.3 4X4 SRW, SC, LB, VDO Gauges, JWVB, PHP Hydra, Tru-Cool Max, KYB Monomax, BTM, BD Brakeloc, S&B CAI, zoodad, WW, Firestone Airbags
Last edited by cpfullback; 06-12-2013 at 04:05 PM.