01 7.3L PSD Airflow Noise Inquiry
#1
01 7.3L PSD Airflow Noise Inquiry
So after having my 4R100 completely rebuilt to complete billet specs I have been able to put down alot more of the power within Jody's 120HP setting on his F5 chip. Last night the woman and I were out to dinner and we took my rig for once and after leaving the food joint I kinda got into it around a turn and into a straight away. Well I've noticed more and more lately that I've began to hear more "turbo bark" sounds but last night I started to hear what sounds like a distorted airflow/almost hissing between 45 and 65mph (highway speeds) when I gradually put my foot back into the throttle.
I have no DTC codes, no loss of boost, EGT's are well within their normal operating parameters and no real noticable loss of power. Everything seems normal except for that damned sound.
My thoughts when I got home were to check my turbo piping/innercooler lines & airfilter (which needed cleaning). I tightened all of the couplers that I could manage to reach and they seemed to tighten a little bit but not a whole lot.
My thought diagnosis wise would more than likely be either......
1) Waste gate took a dump
2) Torn coupler that I cannot see
or
3) Blown head gasket (though HIGHLY doubtful with the amount of miles on my rig and I'm very gentle normally).
Truck basics:
2001 F250 7.3L PSD, 4R100, 117K miles, complete AMSOIL synthetic fluids since 108K, Airaid intake, Silverline 4" turboback exhaust system, DP F5 chip & lifted 6.5" on 37"s.
Thoughts? Suggestions?
Thanks in advance
Bill
I have no DTC codes, no loss of boost, EGT's are well within their normal operating parameters and no real noticable loss of power. Everything seems normal except for that damned sound.
My thoughts when I got home were to check my turbo piping/innercooler lines & airfilter (which needed cleaning). I tightened all of the couplers that I could manage to reach and they seemed to tighten a little bit but not a whole lot.
My thought diagnosis wise would more than likely be either......
1) Waste gate took a dump
2) Torn coupler that I cannot see
or
3) Blown head gasket (though HIGHLY doubtful with the amount of miles on my rig and I'm very gentle normally).
Truck basics:
2001 F250 7.3L PSD, 4R100, 117K miles, complete AMSOIL synthetic fluids since 108K, Airaid intake, Silverline 4" turboback exhaust system, DP F5 chip & lifted 6.5" on 37"s.
Thoughts? Suggestions?
Thanks in advance
Bill
#3
---AutoMerged DoublePost---
Well since I'm a somewhat noob to the turbo world I didn't know what surging sounded like. I also left out a little piece of intel that was somewhat important as well......
After having my tranny built to stage III billet specs my builder (Jim@ATO/Rancho Cordova, CA) suggested that I grab a Banks Trans-Command module just to up my line operating pressure a tad bit more to get optimum performance from my new tranny. The surging really only started shortly after I installed the Trans-Command module.
So next up is an ATS housing and a Wicked Wheel. Then a "Technicooler" and then I'm DONE with this bitch!
Last edited by wrs8574; 04-22-2008 at 03:50 AM. Reason: Automerged Doublepost
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