Been working on this for a while. Appreciate any ides or advice. Read through all the similiar posts but still unsure of what all the tests results mean. Am hoping the more experienced and knowledgable can shed some light.
Engine stopped midway through a few hundred mi trip. Towed home and now no start and no smoke. Am a weekend mechanic. More of a electronics guy and have the tools and experience to repair circuit boards.
Single owner. 2002 7.3 Powerstroke. 36K miles. No problems before this one.
Strong Engine cranking.
HPOP has oil within 1" of top. No HPOP leaks.
No oil on ICP connector and engine still does not start with ICP unplugged.
Fuel pump runs and fills fuel filter bowl.
Fuel filter is new. Changed filter when checking to see bowl fill by pump.
Batteries are charged and less than 1 yr old
GPR test good
Tach does not move when cranking. WTS DOES light every time.
CPS was replaced by Ford on recall 6 months ago. I replaced with a new Ford part CPS anyway.
No smoke but fuel filter bowl fills and fuel pump whirls.
Fuel gage will not go above empty even though the fuel tank is completely full.
Ran ForScan and CarGuage Pro buzz test. Buzz tests results in only a single audible click. Engine is cold since it will not start. At the end of tests get codes:
Always get code P0460. This is most likely due to the fuel sense circuit but would this cause a NO START?
Clear codes and rerun buzz rest then get P0460, P1283, and P1667. Have run apx 20-30 buzz tests. P0460 is after every test. P0460, P1283, and P1667 is registered after about 80% of the tests and once the result was P0460 and P0231. Nevewr hear more that the one very short click under the hood on all tests. Same results either running buzz test with ForScan or CarGuage. Never hear any of the clicking seen from the numerous Youtube buzz tests videos.
Ran GB Remanufacturing - Tech Bulletin #103 test on IDM connector. All tests results well within specs. Ohmed tested valve cover connectors (glow plug test). Test results all good with no shorts. IDM connectors are clean and shinny. No corrosion on IDM or 9 pin injector connectors. Have not opened yet since I am unsure weather the issue is IPR or other. If it is the IDM I can repair but did not want to break the IDM water seal unless all of the tests point to the IDM.
When cranking both Cargauge and ForScan provide these measurements:
EOT=59F
IAT=56F
IMAT=106F
EBP=14PSI
TFT=57F
ICP=2000-2600PSI while cranking and 222PSI with key in ignition after cranking stops.
GPR=98.83 (not sure what this number represents but the GP side of the GPR terminal reads ~.75 volts less than the hot side of the GPR.
MAP=99 kPa
IPR Duty = 30.8% KOEO, Cranking 51%
IPR Pressure = .21V KOEO, Cranking 2.62V
RPM = 178
Electronic Pressure = 34.3 KpA KOEO
Fuel Pump Duty Cycle Cranking = 101.6%
Glow Plug Left and Right (cranking) = 0Amps
All fuses test OK. Swapped out IDM relay and still no start.
So all the wiring is verified from IDM to injectors. Injector resistance at valve cover 9 pin connector is good. Do these results mean that the IPR is bad or IDM? If the IPR is bad would it stop the buzz test from stepping through all 8 injectors or ???????.
Do I need to run other tests or is there something here that those with experience and knowledge would suggest?
Appreciate any suggestions on where to look next.
Thank you so much.
Engine stopped midway through a few hundred mi trip. Towed home and now no start and no smoke. Am a weekend mechanic. More of a electronics guy and have the tools and experience to repair circuit boards.
Single owner. 2002 7.3 Powerstroke. 36K miles. No problems before this one.
Strong Engine cranking.
HPOP has oil within 1" of top. No HPOP leaks.
No oil on ICP connector and engine still does not start with ICP unplugged.
Fuel pump runs and fills fuel filter bowl.
Fuel filter is new. Changed filter when checking to see bowl fill by pump.
Batteries are charged and less than 1 yr old
GPR test good
Tach does not move when cranking. WTS DOES light every time.
CPS was replaced by Ford on recall 6 months ago. I replaced with a new Ford part CPS anyway.
No smoke but fuel filter bowl fills and fuel pump whirls.
Fuel gage will not go above empty even though the fuel tank is completely full.
Ran ForScan and CarGuage Pro buzz test. Buzz tests results in only a single audible click. Engine is cold since it will not start. At the end of tests get codes:
Always get code P0460. This is most likely due to the fuel sense circuit but would this cause a NO START?
Clear codes and rerun buzz rest then get P0460, P1283, and P1667. Have run apx 20-30 buzz tests. P0460 is after every test. P0460, P1283, and P1667 is registered after about 80% of the tests and once the result was P0460 and P0231. Nevewr hear more that the one very short click under the hood on all tests. Same results either running buzz test with ForScan or CarGuage. Never hear any of the clicking seen from the numerous Youtube buzz tests videos.
Ran GB Remanufacturing - Tech Bulletin #103 test on IDM connector. All tests results well within specs. Ohmed tested valve cover connectors (glow plug test). Test results all good with no shorts. IDM connectors are clean and shinny. No corrosion on IDM or 9 pin injector connectors. Have not opened yet since I am unsure weather the issue is IPR or other. If it is the IDM I can repair but did not want to break the IDM water seal unless all of the tests point to the IDM.
When cranking both Cargauge and ForScan provide these measurements:
EOT=59F
IAT=56F
IMAT=106F
EBP=14PSI
TFT=57F
ICP=2000-2600PSI while cranking and 222PSI with key in ignition after cranking stops.
GPR=98.83 (not sure what this number represents but the GP side of the GPR terminal reads ~.75 volts less than the hot side of the GPR.
MAP=99 kPa
IPR Duty = 30.8% KOEO, Cranking 51%
IPR Pressure = .21V KOEO, Cranking 2.62V
RPM = 178
Electronic Pressure = 34.3 KpA KOEO
Fuel Pump Duty Cycle Cranking = 101.6%
Glow Plug Left and Right (cranking) = 0Amps
All fuses test OK. Swapped out IDM relay and still no start.
So all the wiring is verified from IDM to injectors. Injector resistance at valve cover 9 pin connector is good. Do these results mean that the IPR is bad or IDM? If the IPR is bad would it stop the buzz test from stepping through all 8 injectors or ???????.
Do I need to run other tests or is there something here that those with experience and knowledge would suggest?
Appreciate any suggestions on where to look next.
Thank you so much.