6.5 turbo
New Member
I have a 94 suburban with 6.5 turbo diesel the turbo cuts out wile driving and stays off for a bought a mile or two then comes back on some time it keeps doing it do not know what is causing it doesn't all ways do it .
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6.5 turbo diesel the turbo cuts out wile driving
- Thread starter 6.5 turbo
- Start date
ak diesel driver
6.5 driver
Hook up a vacuum guage right at the actuator and ut it where you can see it while driving. If your vacuum goes away when you lose boost things to check are vacuum pump, vacuum solenoid, plastic lines
Big T
Well-Known Member
Just went through this on a '94 Suburban:
http://www.thetruckstop.us/forum/showthread.php?40592-94-Burb
Checked the plastic lines from solenoid (drew a vacuum by mouth and watched actuator work), they were not leaking. Replaced solenoid, nothing. Had no way to test vacuum pump, but could have easily swapped in a known working one from a wrecked '95. So had always planned on installing an ATT, thereby deleting the vacuum pump, so that is the route he went. Virtually all problems described in his post disappeared, the exception being a now occasional whackiness in the speedo.
http://www.thetruckstop.us/forum/showthread.php?40592-94-Burb
Checked the plastic lines from solenoid (drew a vacuum by mouth and watched actuator work), they were not leaking. Replaced solenoid, nothing. Had no way to test vacuum pump, but could have easily swapped in a known working one from a wrecked '95. So had always planned on installing an ATT, thereby deleting the vacuum pump, so that is the route he went. Virtually all problems described in his post disappeared, the exception being a now occasional whackiness in the speedo.
:welcome2:
Im thinking it sounds like fuel delivery. Got any codes?
BTW I think War Wagon is your neighbor (good one to have).
Im thinking it sounds like fuel delivery. Got any codes?
BTW I think War Wagon is your neighbor (good one to have).
6.5 turbo
New Member
I have been getting code 48 Intake Air Temperature (IAT) Circuit High (Low Temp) off and on
Big T
Well-Known Member
If you're getting an IAT code, then the ECM is defueling (cutting back throttle) because your IATs are too high, or the sensor is going out. Sensor is a cheap and easy fix and probably your
answer based on the intermittent problem. High IATs is more of an issue towing a heavy load up a grade in the heat with a GM Turbo.
answer based on the intermittent problem. High IATs is more of an issue towing a heavy load up a grade in the heat with a GM Turbo.
6.5 turbo
New Member
today I replaced the Intake Air Temperature Sensor hope that will fix my problem
Big T
Well-Known Member
Good luck and let us know the outcome.
6.5 turbo
New Member
well it been a good week and it look like replacing Intake Air Temperature Sensor fixed it for now.
Big T
Well-Known Member
Guess I win the chicken dinner.:thumbsup::hihi:
JayTheCPA
Well-Known Member
Very true, just don't loan him your keys :rofl: