w2racing Posted August 1, 2012 Report Share Posted August 1, 2012 Okay Guys.............My neighbors truck was going down the road when all of a sudden, the truck lost power (fuel pressure). Similar to running out of gas. I double checked and both fuel tanks are full. Truck acts like it wants to start, but does not start. She had replaced the fuel pump a few months back. Also, the fuel gauges are showing that the tanks are empty, but they are not. Any ideas on what the issue is? She is on a fixed income and could really use an angel to lead her down the right path. Link to comment Share on other sites More sharing options...
4cylfordz Posted August 1, 2012 Report Share Posted August 1, 2012 is it a mechanical or electric fuel pump? ? look down in the valley between the heads for the mechanical pump. also the most common no start is a bad crank sensor ( front of the block next to the balencer). and then the Ipc ( looks like a oil pressure switch on the driver side head front top) look at those two closely Link to comment Share on other sites More sharing options...
KISS_Racing Posted August 1, 2012 Report Share Posted August 1, 2012 Okay Guys.............My neighbors truck was going down the road when all of a sudden, the truck lost power (fuel pressure). Similar to running out of gas. I double checked and both fuel tanks are full. Truck acts like it wants to start, but does not start. She had replaced the fuel pump a few months back. Also, the fuel gauges are showing that the tanks are empty, but they are not. Any ideas on what the issue is? She is on a fixed income and could really use an angel to lead her down the right path. Is this truck a 7.3l Diesel? If yes, then CPS or ICP. If no then have fuel pressure checked. Link to comment Share on other sites More sharing options...
4cylfordz Posted August 1, 2012 Report Share Posted August 1, 2012 hmm I burned too much midnight oil last night. after spending the day working on a 7.3 then reading "similar to running out of gas" I may have jumped to a conclusion... my bad Link to comment Share on other sites More sharing options...
w2racing Posted August 1, 2012 Author Report Share Posted August 1, 2012 Okay Guys.............My neighbors truck was going down the road when all of a sudden, the truck lost power (fuel pressure). Similar to running out of gas. I double checked and both fuel tanks are full. Truck acts like it wants to start, but does not start. She had replaced the fuel pump a few months back. Also, the fuel gauges are showing that the tanks are empty, but they are not. Any ideas on what the issue is? She is on a fixed income and could really use an angel to lead her down the right path. Is this truck a 7.3l Diesel? If yes, then CPS or ICP. If no then have fuel pressure checked. Yes, it is 7.3l Diesel. Link to comment Share on other sites More sharing options...
Ford27 Posted August 1, 2012 Report Share Posted August 1, 2012 Cps...they did have a recall on them so if that's it ford will replace it. It should also show up on a code reader Link to comment Share on other sites More sharing options...
KISS_Racing Posted August 1, 2012 Report Share Posted August 1, 2012 Cps...they did have a recall on them so if that's it ford will replace it. It should also show up on a code reader Yep and Yep... CPS first, then ICP sensor if that doesn't work. CPS - Crank Position Sensor ICP - Injection Control Pressure (sensor) Also, make sure the three prong plug is pushed all the way in. ICP is on top of the motor at around 4 o'clock to the fuel filter bowl when viewed from overhead from the front of truck. The plug is a weatherpack type plug. I have seen in one instance and it was a fluke that a injector harness went bad but truck still ran just ROUGH... CPS is a 10mm bolt that can be accessed from the bottom of the truck. As Ford27 said, dealer should replace for free but may be iffy based on age? Mark Link to comment Share on other sites More sharing options...
Bigdogracing777 Posted August 2, 2012 Report Share Posted August 2, 2012 Cps...they did have a recall on them so if that's it ford will replace it. It should also show up on a code reader Yep and Yep... CPS first, then ICP sensor if that doesn't work. CPS - Crank Position Sensor ICP - Injection Control Pressure (sensor) Also, make sure the three prong plug is pushed all the way in. ICP is on top of the motor at around 4 o'clock to the fuel filter bowl when viewed from overhead from the front of truck. The plug is a weatherpack type plug. I have seen in one instance and it was a fluke that a injector harness went bad but truck still ran just ROUGH... CPS is a 10mm bolt that can be accessed from the bottom of the truck. As Ford27 said, dealer should replace for free but may be iffy based on age? Mark My 96 F250 7.3 had 375,000 and they replaced it for free also ask about air filter fuel filter when it was replaced last air filter has whatumacallit/chingadera on side to let you know its stopped up Link to comment Share on other sites More sharing options...
KISS_Racing Posted August 2, 2012 Report Share Posted August 2, 2012 Cps...they did have a recall on them so if that's it ford will replace it. It should also show up on a code reader Yep and Yep... CPS first, then ICP sensor if that doesn't work. CPS - Crank Position Sensor ICP - Injection Control Pressure (sensor) Also, make sure the three prong plug is pushed all the way in. ICP is on top of the motor at around 4 o'clock to the fuel filter bowl when viewed from overhead from the front of truck. The plug is a weatherpack type plug. I have seen in one instance and it was a fluke that a injector harness went bad but truck still ran just ROUGH... CPS is a 10mm bolt that can be accessed from the bottom of the truck. As Ford27 said, dealer should replace for free but may be iffy based on age? Mark My 96 F250 7.3 had 375,000 and they replaced it for free also ask about air filter fuel filter when it was replaced last air filter has whatumacallit/chingadera on side to let you know its stopped up The filterminder most likely wont keep it from running or keep it from starting... Awesome on dealer replacing yours. I didn't want to get any hopes up as I don't represent a dealer, but it never hurts to try it. I'm going with a 75% on CPS. Link to comment Share on other sites More sharing options...
race45 Posted August 2, 2012 Report Share Posted August 2, 2012 dealer replaced my cps on my 97 f-350 7.3 liter and i was at 175,000 clare Link to comment Share on other sites More sharing options...
railer Posted August 3, 2012 Report Share Posted August 3, 2012 I replaced cps 3 times it still shuts off ,with no chck engine light 1999 7.3 351000 I dont know next is the IPC . this thread is helping me too .keep it going. Link to comment Share on other sites More sharing options...
4cylfordz Posted August 3, 2012 Report Share Posted August 3, 2012 I replaced cps 3 times it still shuts off ,with no chck engine light 1999 7.3 351000 I dont know next is the IPC . this thread is helping me too .keep it going. I would look toward batteries, grounds and terminations i know it will make them flip out if there isn't 100% perfect connection for the batteries. the Ipc sensor will mainly cause them to just run bad though they can stall do to a bad one. it measures oil pressure from the high pressure rails and the computer tunes the fuel to match for cold oil or hot oil since the viscosity and pressure will change due to engine temperature as well as rpm. Link to comment Share on other sites More sharing options...
KISS_Racing Posted August 3, 2012 Report Share Posted August 3, 2012 I replaced cps 3 times it still shuts off ,with no chck engine light 1999 7.3 351000 I dont know next is the IPC . this thread is helping me too .keep it going. I would look toward batteries, grounds and terminations i know it will make them flip out if there isn't 100% perfect connection for the batteries. the Ipc sensor will mainly cause them to just run bad though they can stall do to a bad one. it measures oil pressure from the high pressure rails and the computer tunes the fuel to match for cold oil or hot oil since the viscosity and pressure will change due to engine temperature as well as rpm. Just realized and remember to ask. If a truck has a chip on it, be sure to make sure the chip is still plug in... And yes the ICP does validate the oil pressure as well as tell the computer whether to add more or less fuel. I have even seen truck with 7.3 rough extremely rough and or die with low oil level. As mentioned since this is on the hpop side if the oil level is low the hpop pressure is low. (Also wrong oil will cause issues) I still say CPS. Link to comment Share on other sites More sharing options...
LavenderRacing3 Posted August 3, 2012 Report Share Posted August 3, 2012 It's a Ford... I think thats enough said.... Link to comment Share on other sites More sharing options...
norman Posted August 4, 2012 Report Share Posted August 4, 2012 lavenderracing3 the man came to this form for help this is what this part of this forum is about maybe you should not reply if you cant help Link to comment Share on other sites More sharing options...
w2racing Posted August 4, 2012 Author Report Share Posted August 4, 2012 Thank you to all the persons that have gotten on and given her a place to start. She is still dealing with the issue and I don't know whether or not she has had anyone look at it. She had her truck towed to her Moms house and I have not seen her. So thanks agian to the folks that have given advise. Link to comment Share on other sites More sharing options...
KISS_Racing Posted August 6, 2012 Report Share Posted August 6, 2012 Thank you to all the persons that have gotten on and given her a place to start. She is still dealing with the issue and I don't know whether or not she has had anyone look at it. She had her truck towed to her Moms house and I have not seen her. So thanks agian to the folks that have given advise. w2 where is the truck located? Link to comment Share on other sites More sharing options...
w2racing Posted August 7, 2012 Author Report Share Posted August 7, 2012 w2 where is the truck located? Truck is located a few miles south of San Antonio going out 281. At least that is where it was last time I talked to her. Link to comment Share on other sites More sharing options...
KISS_Racing Posted August 7, 2012 Report Share Posted August 7, 2012 Thank you to all the persons that have gotten on and given her a place to start. She is still dealing with the issue and I don't know whether or not she has had anyone look at it. She had her truck towed to her Moms house and I have not seen her. So thanks agian to the folks that have given advise. w2 where is the truck located? Truck is located a few miles south of San Antonio going out 281. At least that is where it was last time I talked to her. Let's get together after Tuesday of next week. I should be settled back into the swing of things by then. Would You mind asking them to verify the oil level please. The hpop needs good oil pressure to do it's job and if the truck is low on oil or has lost it's viscosity I have known 7.3's to stop running. I have had one report of a guy who lightly tapped on the cps and got the truck to run enough to move it till it could be towed. Another thing and I think I mentioned it earlier on, but there is a sensor called an ICP which is at about three oclock to the fuel bowl. I have seen the click that holds the connector to the sensor get broken during service and just pkugged in to eventually come unplugged due to vibration. Please ask them to verify the plug is seated in the sensor. *sorry this is not my picture) You will have to read it carefully to see (ICP) as it is labeled in red over picture... Fuel Bowl and ICP Sorry Nick, I had to use another forum... Link to comment Share on other sites More sharing options...
CorcoranSuperMod Posted August 12, 2012 Report Share Posted August 12, 2012 Okay Guys.............My neighbors truck was going down the road when all of a sudden, the truck lost power (fuel pressure). Similar to running out of gas. I double checked and both fuel tanks are full. Truck acts like it wants to start, but does not start. She had replaced the fuel pump a few months back. Also, the fuel gauges are showing that the tanks are empty, but they are not. Any ideas on what the issue is? She is on a fixed income and could really use an angel to lead her down the right path. If issue has not been solved at this point, you might pull the valve covers and check the wiring harness connections --- pretty common prob. on some 7.3. If that is the prob. it will kill the four cyl. on that side. May also check the wiring harness for rubs. Link to comment Share on other sites More sharing options...
KISS_Racing Posted August 13, 2012 Report Share Posted August 13, 2012 Okay Guys.............My neighbors truck was going down the road when all of a sudden, the truck lost power (fuel pressure). Similar to running out of gas. I double checked and both fuel tanks are full. Truck acts like it wants to start, but does not start. She had replaced the fuel pump a few months back. Also, the fuel gauges are showing that the tanks are empty, but they are not. Any ideas on what the issue is? She is on a fixed income and could really use an angel to lead her down the right path. If issue has not been solved at this point, you might pull the valve covers and check the wiring harness connections --- pretty common prob. on some 7.3. If that is the prob. it will kill the four cyl. on that side. May also check the wiring harness for rubs. I would say anything is possible... As You stated it would most likely be one bank of injectors unless it were in the main harness. Have they been able to do anything with the truck? Link to comment Share on other sites More sharing options...
w2racing Posted August 13, 2012 Author Report Share Posted August 13, 2012 I would like to say thank you to all that have help. Without knowing, she got her truck fixed a couple of days ago. It was the CPS. She had her brother replace the bad unit. Thanks Speedzone for giving us a platform to ask these types of questions, and get some really good advice. Thanks again to all that help. Link to comment Share on other sites More sharing options...
KISS_Racing Posted August 14, 2012 Report Share Posted August 14, 2012 Awesome news... Now thats what I'm talking about........ Link to comment Share on other sites More sharing options...
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