jimwrench Posted April 22, 2011 Share Posted April 22, 2011 2005 6.0 173 k hard start no start parameters are all there 1200 icp cranking 65 fuel pressure no codes ficm voltages 11.5 and 48 tried know good ficm has sync and ficm sync 4 new injectors 3 months ago 3 new ones on other side 8 months ago with studs and egr delete air tested high pressure oil system held great to 500 psi truck drove to dealer for accessories and now wont start Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted April 22, 2011 Share Posted April 22, 2011 truck drove to dealer for accessories and now wont start What accessories were installed? Was it still in the shop when this condition began? What is your ICP VOLTAGE? Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted April 22, 2011 Share Posted April 22, 2011 Originally Posted By: jimwrench truck drove to dealer for accessories and now wont start What accessories were installed? Was it still in the shop when this condition began? What is your ICP VOLTAGE? And IPR... enquiring minds want to know... Quote Link to comment Share on other sites More sharing options...
jimwrench Posted April 22, 2011 Author Share Posted April 22, 2011 was in for driving lights and running boards.... my icp voltage is at .8 and my ipr % is 87% then drops down to 23% while cranking as pressure builds and the accessories never did get installed couldnt get truck into shop...... tried the disconnect icp sensor as well.... Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted April 22, 2011 Share Posted April 22, 2011 Man!!! This is like pulling teeth. When is the ICP 0.8? KOEO? Cranking? For IPR to show 87% and then drop to 23% - something don't smell right (KOEO IPR is usually 14% - caution, memory thing). FWIW... IPR is the PCMs response to the ICP reading... Just so we know, what are SYNC, FICM_SYNC and FUEL_PW showing? While cranking.... Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 22, 2011 Share Posted April 22, 2011 Ditto on all above, unplug the ICP and see if it starts. ICPV should be .17-.24V KOEO, IPR is 15% KOEO (I think actually 14.85%, Jim), but if the IPR is going to 85% there's something the PCM doesn't like in the HPOP system. The injectors are enable about .8 but it should build 1.5V ICP cranking. DON'T DEPEND ON ICP PRESSURE, ONLY VOLTAGE during a no start! Quote Link to comment Share on other sites More sharing options...
jimwrench Posted April 22, 2011 Author Share Posted April 22, 2011 Sorry for making things not clear... KOEO ICP .23 IPR 15% cranking icp 1.9-2.2 ipr 85% then as pressure builds drops to 32% injector trim is 8.7 i contribute the spike in the ipr due to the fact i pressure tested the high pressure oil system with nitrogen to 500 psi to test for a leak so there is still some air in the oil rails no hight pressure oil leak detected with the valve covers off and ipr electronically closed Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 23, 2011 Share Posted April 23, 2011 If your ICPV starts at .23v and climbs to 2v cranking, your problem is not likely in the HP oil system. Plug the homemade "dual light bulb tool" into an injector harness and see if the injectors are getting a pulse command from the FICM during cranking. If you have all of the above things that you state, your problem is in the injectors, compression, or fuel. Good Luck! Quote Link to comment Share on other sites More sharing options...
mchan68 Posted April 23, 2011 Share Posted April 23, 2011 I'll put in my two cents worth. I think it is injectors based on the fact that there are no codes set. I would run an Injector Buzz test with the home made tool in the above post, plugged into each of the eight injector connectors to compare the brightnesses. Since the vehicle in question is a 2005, there is no EGR throttle plate to worry about, unless it has one of those aftermarket positive air block-offs stuck closed. But if either were the case, the engine would likely sound like a gasser being cranked over with the spark plugs removed. Will this truck fire up with a hit of Brake Parts Cleaner? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.