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6.5l td drivability issue's

Messages
19
Likes
16
Location
Texas
Thread starter #1
OK so this my first experience with the 6.5l Chevrolet engine.
1999 C3500 2wd 5spd
1ton.
Initially got these codes
P0216
Injection stepper motor fault.
P0236
Waste gate solenoid fault.
P0238
turbo boost sensor to high.
P0251
Pump cam reference pulse error.
P0370
High resolution circuit fault.
P0606
PCM internal communication interupt.
P1216
Fuel solenoid response to short.
P1217
Fuel solenoid response to long
Changed all major sensors.
Lift pumps, fuel filter.
Cleared codes.
Tonight I got codes P0251 P0606
Please tell me what to fix.
Starts right up,idles no miss,1,2,3,4 gear no issues.
5th gear stutters then dies wait a few seconds starts right back up.
 
Messages
19
Likes
16
Location
Texas
Thread starter #5
You said "changed all major sensors", which one specifically did you change?
Are you putting ACDelco sensors?

The word all does not mean a thing in trying to help you.
Turbo boost sensor ,vacuum sensor, crank position sensor, baro sensor.
Yes ACDelco.

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Messages
19
Likes
16
Location
Texas
Thread starter #7
The sensors are likely doing their job and sensing a problem that's not due to the sensor.
Kind of figured that one out the hard way.
Everything I research keeps me thinking ECM.
I keep hoping I'm wrong.
But guess that's why I ask for help.
First 6.5l td.
Don't know enough about the automotive computer systems.
Real learning curve there.

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MrMarty51

Well-Known Member
Messages
1,322
Likes
1,241
Location
Miles City, Montana
#12
Kind of figured that one out the hard way.
Everything I research keeps me thinking ECM.
I keep hoping I'm wrong.
But guess that's why I ask for help.
First 6.5l td.
Don't know enough about the automotive computer systems.
Real learning curve there.

Sent from my SM-N910V using Tapatalk
Get a vacuum gauge and check the vacuum pump.
Not enough vacuum will throw all kinds of codes for the turbo system.
welcome to the forum Budd.
 
Messages
19
Likes
16
Location
Texas
Thread starter #17
I am not sure where you are in TX since TX is bigger than some countries.

If you have Harbor Freight stores nearby, you can get a vacuum gauge for cheap.
May not be used for pro but it will be doable for what you want to do.
If I have faulty OPS how would I check that???

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Messages
19
Likes
16
Location
Texas
Thread starter #20
OK so here's what I've done.
PMD relocated to drivers side fender well.
Replaced baro censor.
Replaced turbo boost sensor.
Replaced vacuum censor.
Replaced crank censor.
Replaced lift pump
Checked grounds.
Included photo of bosch code read out.
see attached photo please.
I have fuel at filter housing.
Fuel at IP no air.
1,2,3,gears no issues.
4,5,gears stuttering and then dies wait 5 minutes or so it restarts.
Codes in attached photo keep coming back up after clearing them.
Please somebody tell me what I'm doing wrong?
Next step is maybe ECM.


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