BLittle500 Posted June 29, 2009 Share Posted June 29, 2009 Brought truck in for no power, clogged/stuck EGR valve, no big deal. Road tested the truck, ran good, brought it back and shut it down. I went to re start it just to check and it would just crank but no start. I hooked up the fuel pressure tester and that checked out. Then after a few attempts it would try to kick off while cranking, and it would do like a "rolling start". So I drove it back into the shop, hooked up the battery chargers and started checking things. My FICM voltages are showing good on the IDS. I tried to run the KOEO Inj Elec Self Test, and just came up "Fail-PCM". Any thoughts guys, Thanks, Brandon Quote Link to comment Share on other sites More sharing options...
BLittle500 Posted June 29, 2009 Author Share Posted June 29, 2009 While cranking I have FICM Sync, but no Sync sound right? Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted June 29, 2009 Share Posted June 29, 2009 Several things come to mind- Is the PCM getting good power and ground? Does RPM show in datalogger while cranking? Does it run the KOEO test successfully, and are things clicking during the test? What DTC's show up? If there are no codes, can you force a code? What's your cranking RPM- it should be 215 warm, 175 minimum. Weak batteries will cause all kinds of freaky problems. FICM Sync usually comes before Sync, for some reason. No SYNC and no RPM signal is usually a CKP problem. No SYNC with an RPM signal may be the CMP. Rust under the CMP could cause your problem. Change SYNC and FICM sync into a bar graph and check it for being erratic. Good Luck! Quote Link to comment Share on other sites More sharing options...
BLittle500 Posted June 29, 2009 Author Share Posted June 29, 2009 Bruce, the RPM was fine while cranking, right around 200 RPM, and I had the chargers on it just to be sure. Dropped a line to the hotline after posting on here, they said to throw an ICP at it, low and behold it starts every time. Who'd a thunk it? Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted June 29, 2009 Share Posted June 29, 2009 Did you happen to check the ICPV KOEO before hanging one? (Is should be .18-.24v) Seeing high ICPV/ICP KOEO in a no-start with no DTC's is not unusual. If you're screwing around, you could plug it back into the harness and check ICPV.... Quote Link to comment Share on other sites More sharing options...
mchan68 Posted June 29, 2009 Share Posted June 29, 2009 Does it restart after reaching operating temperature? Quote Link to comment Share on other sites More sharing options...
mchan68 Posted June 29, 2009 Share Posted June 29, 2009 Does it restart after reaching operating temperature? Quote Link to comment Share on other sites More sharing options...
BLittle500 Posted June 29, 2009 Author Share Posted June 29, 2009 After putting the ICP on it does re-start hot, no problem. Quote Link to comment Share on other sites More sharing options...
slim Posted June 30, 2009 Share Posted June 30, 2009 I remembered a post from a while back that had something similar about the ICP doing strange things that were unexplainable. HERE Quote Link to comment Share on other sites More sharing options...
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