[rbr1317]

I need some help or point me in the right direction on what could be the problem. I have been having a problem in that we can not get the truck timed because the inability to clear a Code 88. This has been this way for at least 6 months. Well now the IP failed (irratic throttle, run away a couple of times at full throttle) and I figured that this has been the problem all along. So I ordered a brand new pump, installed it and I now get codes 34 and 88. When cold it starts like a flooded gasser.. chug, chug, chug, lots of white smoke but eventually clears up. It runs "ok" but not great.
Few things to mention:

• It has been starting hard for a few months. It has been getting progressively worse since last spring. It used to be now and then starting hard but lately it is every day.
• The SES light comes on at about 2000 rpm and stays on until you shut it off.
• After clearing the codes the Code 88 immediately comes back without the truck even running. (cleared with paper clip - simultaneously depressing the brake and accelerator pedals )

I do not have a scanner to set the timing or even know where it is set at. I would imagine the timing is out and causing the 34 (maybe). I will be going to Heath and have him set it. My concern is that I can not clear the code 88 prior to even trying to have the timing set.

What would cause a code 88 without even having the engine running?

Thanks for any help.

 

[kena]

When you set the timing, the code 88 will go away.
.

 

[gmctd]

Let Bill look at it - he'll know what to do, in any event.

 

[THEFERMANATOR]

Code 88 is because your timing is not set.

code 88= TDCO error(no TDC offset is in ECM memory or it is grossly wrong)

 

[DavidPhillips]

To clarify this, get the timing set and your good to go.

 

[rbr1317]

Well Bill could not time my truck because he couldn't get rid of the code 88. He said my pump was turned too much towards the drivers side - more than normal - for it to run half way decent. He thought it must be that my CAM key was haf sheared. So this weekend I tore into it and this is what I found. Half sheared cam key like he said... I thought I would share incase someone else has timing issues like mine.

 

[gmctd]

Informative post, Rob - demonstrates importance of visual input in diagnosis

Thanks for the update.