unplug icp see if she will fire and run.... if she does thats probably the culprit

 

I did that and it died

 

Ok, hooked up to AE, and got....
injector control pressure-482.50 psi
Injector Control Pressure volts-.87
Injector control duty cycle-12.11

 

Throttle Position Sensor-0

 

According to these numbers shld I get a new ICP? Als no one has answered about when I unplugged it, the truck died

 

So it starts and idles fine but sputters and surges under power?


Normal readings if you have gutted EPBV Pedestal or you have it unplugged...

Did these codes come back after you cleared them? We would prefer to know if you have to drive around to get the codes to re-appear or just starting the truck brings the codes back.

Again, all normal readings..

Normal. Duty cycle may be a percent or two low. But not alarming readings here...

Normal also...

You should get a new ICP sensor because there is oil in the plug. The numbers look fine but your Voltage Reference Signal could be affected and that will affect your PCM's ability to control the various systems.

If your P1280 and P1211 codes come back while driving then I suspect something might be up with your IPR valve. Perhaps the tin nut on the back is coming loose. Have you checked that yet?

If your only problem was a bad ICP sensor, then your engine should start and run with it unplugged because the PCM assigns a default value based on a table of values pre-programmed at the factory. However, that table only works if all the other sensors and regulators are functioning properly. Since your engine dies when you unplug the ICP, then something else isn't working as expected. In my mind, the leading candidate to check is the IPR valve. Guzzle has rebuild kits if you find that you need one.

Here is a link to a procedure that talks about checking the high pressure oil system. If you decide to try this, then keep an eye on your Duty Cycle and ICP pressure and see if your numbers are normal.

 

Ok, I think Im half way there. When I got the truck (2 yrs ago) it had an Edge under the hood, but the wires to PCM had been cut, so while checking ICP sensor, I saw it had wires going to the Edge, I disconnected them (they had oil in them also) and the truck ran with it un plugged, did a test drive and didn't get any issue til I was pulling back in my driveway. Replacing ICP and hopefully will not have anymore issues. If it weren't for you guys I would have never found this, I wld have had to resort to going to the stealership and pay thousands, thanks guys, and I will keep you posted after I replace the ICP