help 1999 7.3 hissing under low acceleration
#1
help 1999 7.3 hissing under low acceleration
my 1999 is hissing under low acceleration,hot or cold,
i changed the EBV and tube
turbo pedastel / base new o rings,
muffler and pipes ,stock
its intermitent at low rpms,feels as though it looses power till hissing goes away
the turbo was inspected and is in good condition as far as the impelar and bearings.
changed oil,fuel filters,all intercooler hoses and turbo hoses seem to be tight no carbon,no carbon on down pipes donuts,new glow plugs,starts and runs great except for the hissing and power loss
HELP PLEASE
---AutoMerged DoublePost---
OH and there are no codes !!
on snap on scanner,comes up clean!
i changed the EBV and tube
turbo pedastel / base new o rings,
muffler and pipes ,stock
its intermitent at low rpms,feels as though it looses power till hissing goes away
the turbo was inspected and is in good condition as far as the impelar and bearings.
changed oil,fuel filters,all intercooler hoses and turbo hoses seem to be tight no carbon,no carbon on down pipes donuts,new glow plugs,starts and runs great except for the hissing and power loss
HELP PLEASE
---AutoMerged DoublePost---
OH and there are no codes !!
on snap on scanner,comes up clean!
Last edited by kingd91; 12-13-2010 at 07:11 PM. Reason: Automerged Doublepost
#2
There should be no codes... Your truck is doing what it should under light accel and when idleing.
Your Exhaust Back Pressure Valve is closing, causing the noise and also putting your motor under more load to help it warm up. I'm betting you live somewhere that it does not get cold very often and now it is???
Completely normal.
Your Exhaust Back Pressure Valve is closing, causing the noise and also putting your motor under more load to help it warm up. I'm betting you live somewhere that it does not get cold very often and now it is???
Completely normal.
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