97 6.5 changed ip now its blowing white smoke?

[97GMC6.5Z71]

I have a 97 1500 6.5 turbo and i've changed the injection pump because it stopped running with the old one. Now it runs with the newer pump but its blowing white smoke and has code P0216 -- Injection Timing Control Circuit

What is Injection Timing Control Circuit? And what can i do about it?

I think the timing is off. I marked the old one and install the new one the same way!

[mkhagemann]

you will need a Tech II to perform a timing set and tdc offset learn. P0216 is set when a difference of 5 deg or more between actual inj timing and desired inj timing. after running timing set if white smoke doesn't clear, check injectors.

[97GMC6.5Z71]

does anybody have a tech 2 scaner near wilmington NC?

[moondoggie]

Good Day!

What he (mkhagemann) said. White smoke usually means really retarded timing.

Merry Christmas!

[Robyn]

Sounds about right.
You can move the Ip some to advance the timing until the ECM stops complaining and you will be close.

The code will set as soon as the temp at the CTS reaches 170 IIRC
Once you get the timing within the 5 degree tollerance the ECM will quite bitching.

If you do use a scan tool and do a tdc learn you can mark the IP and the housing with a scribe and you will be able to remove and replace the IP from that point and replace it without issue. ;)

Good luck

Robyn

[97GMC6.5Z71]

I got a snap-on 2500 and set the timing close to 3.5. It was changing from 3.0-4.0 i guess the stepper motor does that.
I set the TDC offset to -5.4 I read that the snap-on scanner reads different and that -5.4 is really -1.94
It runs ok now but its hard to start cold and still got the code 0216 every time i check it and delete it:confused:
I going to check it with a gm Tech II to see if its set right.

[97GMC6.5Z71]

actual inj timing was about 11.0 and desired inj timing about 3.5

[97GMC6.5Z71]

I checked the timing with a Tech II and the TDC offset was -2.44 so i moved the pump some and got the actual timing to average 3.5 going from 2.8-4.1 and a desired timing of 11.1 and i got the TDC offset the land on -1.94 it had a range from -1.67/-2.20
The Inj. pump sol. closure is from 1.82-1.94ms
And i'm still getting the DTC P0216 WTF??

[Robyn]

I would clear the codes and redo the TDC learn procedure.

When you got the timing right does it run and start OK.

Maybe the TDC learn did not set.??????

Let us know

Robyn

[Kennedy]

If the actual cannot match desired timing you will have trouble. You should go into Time Set mode and actual should be around 3.5 or so when desired is 0. When you exit Time set the actual should track with desired as you vary the engine speed.

One common mistake people make is bumping the engine with the starter when the pump drive gear bolts are loose. This can partly shear the key and make a mess...

[97GMC6.5Z71]

If the actual cannot match desired timing you will have trouble. You should go into Time Set mode and actual should be around 3.5 or so when desired is 0. When you exit Time set the actual should track with desired as you vary the engine speed.

One common mistake people make is bumping the engine with the starter when the pump drive gear bolts are loose. This can partly shear the key and make a mess...

Well the actual timing has always been on about 3.5 and has not been over 4.5
when i command time set the desired will go too 0.00 and the act stays about 3.5 when i exit time set mode the desired run up to 11.00 and the actual stay at 3.5

I turned the engine over by hand!

[97GMC6.5Z71]

I would clear the codes and redo the TDC learn procedure.

When you got the timing right does it run and start OK.

Maybe the TDC learn did not set.??????

Let us know

Robyn

Its hard to start cold blows a cloud of white smoke and has a miss for a sec then it runs good but will miss when i first start off in first gear

The TDC offset is on -1.94 every time i check it

[97GMC6.5Z71]

Well the actual timing has always been on about 3.5 and has not been over 4.5
when i command time set the desired will go too 0.00 and the act stays about 3.5 when i exit time set mode the desired run up to 11.00 and the actual stay at 3.5

I turned the engine over by hand!

I think that
>maybe the problem the actual timing not going up

The engine sound does not change when doing the time set?

[97GMC6.5Z71]

OK I checked the volts at the 4pin connector that plugs in to the
stepper motor with the key on 12v, 4v, 12v, 4v, then with
the engine running all four have about 7volts but both the
stepper motors i have do not move with the key on or
running. The advance linkage will move about 3/8"

[97GMC6.5Z71]

Ok i found the problem the valve in the advance piston stuck due to
varnished fuel or contamination from moisture sitting in the
bottom of the pump.
I had to take the injection pump back off to get to it and the
advance linkage was moving but the valve in the advance piston was
stuck and the spring that keeps the valve pushed out was stuck too!