Ford 7.3L Power Stroke (1999-2003) :: Intermittent Crank No Start - No PCM Connection
This has happened only 4 times in the last 4 years till about a month ago. (happened twice in 2 days). With key on i get the glow plug light and CEL on but no power to the pump (FASS) and obviously no fuel pressure. it will crank, but nothing on the tach. I've tried plugging in a scanner and it doesn't make a connection with the pcm. all lights work and gauges work (tach and speedo are at zero obviously)...
Before I couldn't pin down when it happened due to being so intermittent. But the last two times it has happened it was when I started it and drove somewhere close before it was at full operating temp. (and in retrospect the previous times was a similar situation). She'll start fine cold, and when at operating temp.
When it happens I pull the battery cables let it set. Reconnect and within a few tries works fine. PCM going bad? Is there a sensor I need to check? New motor has about 25k on it.
Ford 7.3L Power Stroke (1999-2003) :: Check Fuel Sending Unit Connection
So I did the hutch mod several months ago and all was fine.. Couple days ago I went to fill up, cheap diesel, for upcoming trip.
Fuel gauge was working and showing just less than 1/2 tank. Went to Walmart with gift card and started pumping. Got to talking with duramax owner and noticed fuel was finished. did not pop off like the level was high in fill tube just can to end of money..
SO I get in, turn on key to get mileage to mark down miles, gallon, amount etc and noticed the fuel gauge look like it wanted to go up and then it drops to "E" and the fuel light comes on..
Yesterday I drop spare and check sending unit connection which was OK so must be issue with sending unit. ?? So I might need to take camper shell off, fiberglass, and lift bed.. too much fuel in tank and not going to be driving it enough to get down. What size are the bolts holding bed to frame and how do I need do this??
Ford 7.3L Power Stroke (1999-2003) :: 2002 - Hard Start On Cold - Temperature Sensor / PCM?
I have a 2002 f350 that has had cold starting issues since I bought it. I have replaced the glow plugs twice, the glow plug solenoid four times. When I put a new solenoid on it it works fine for a short time. I know the solenoids are bad because I get battery voltage on one side and nothing on the other. If I jump the solenoid with a jumper wire I can get the truck to start. I thought I was getting bad solenoids but I have recently tested the activation circuit and am getting constant power there. I.e. It never shuts off. I think this is what is causing the solenoids to burn up. From the tracing of wiring diagrams I have done, the only thing before the solenoid is the Pcm. So now to the question,
1) What controls the activation of the Glow plugs? Is there a temperature sensor or something before the Pcm.
2) Is this a case of my Pcm going out on me? I am a mechanic in the army so I have a decent understanding of mechanics.
However I am at a loss for these systems.
Ford 7.3L Power Stroke (1999-2003) :: Fuel Return / Supply Hard Line Connection
I am rebuilding the oil cooler and noticed since its removed I have great access to this fuel line pair from fuel bowl to soft lines below. How these disconnect at the soft lines? I happen to have a new set waiting to be installed. Is there a tool required ?
View 3 RepliesFord 7.3L Power Stroke (1999-2003) :: Cam Sensor Won't Working?
i have a 99 f250 7.3 powerstroke. the cam sensor was acting up. that what the scan tool said. i replaced the cam position sensor yesterday, and the truck is still acting up. the motor hitches and will shut off randomly. it tripped the check engine light, and the code is the "cam position sensor" once the truck is warmed up and shut down for like 10 minutes the sensor will not act up anymore. if i just start the truck and run it, even once it is up to tempature it will act up. but if i shut the truck down for about 10 minutes, it goes away. is there something else that could be causing this?
View 14 RepliesFord 7.3L Power Stroke (1999-2003) :: No ABS Sensor Wire On The Front?
I have an new to me 1999 4x4 F350 that I was giving a good once over today on the front end since it wanders a little bit. but anyways I didnt see a abs sensor wire on the front. the plugs are there behind the inner fender well and it looks like there is a plug when the sensor should go in the wheel bearing. was 2 wheel abs an option on these trucks? is there anything else this changes front end wise?
View 14 RepliesFord 7.3L Power Stroke (1999-2003) :: Replacing EBP Tube And Sensor?
I am doing some maintenance and trying to replace my EBP tube and sensor. I luckily have the dual alternator package, so getting the tube in and out has been a pain to say the least. I can't for the life of me get the tube back into place. As always, a 20 minute job is taking me 2 days.
View 14 RepliesFord 7.3L Power Stroke (1999-2003) :: How Critical Is The Intake Air Temp Sensor
Noticed a while back that the plug for what I assume is the air intake temp sensor is looped. I assume because I can't find the sensor anywhere. how critical is the sensor? The new S&B has a hole for it so it's either gonna need a new sensor or a plug. The local autozone has one for 16.99.
View 12 RepliesFord 7.3L Power Stroke (1999-2003) :: Where To Install Oil Pressure Sensor For Gauge
I need to install an oil pressure sensor sending unit. I've already occupied the 1/8"NPT test port on the rear of the oil cooler, where else might I be able to tap into oil pressure? (LPOP)
View 4 RepliesFord 7.3L Power Stroke (1999-2003) :: Outside Temp Sensor For Overhead Display
For some reason my OH display decided to show 140 deg F when its 40 deg F outside. Continues to show 140 all the time now regardless of out side temp. In case its the related outside temp sensor sending unit, where it is exactly on an 02. Unless someone has solution may try changing that out to see if that is the problem?
View 14 RepliesFord 7.3L Power Stroke (1999-2003) :: Stalling Out - Water In Fuel Sensor
My 2000 F350 7.3 has been stalling out with the water in fuel sensor for the last to tanks of fuel. I thought I needed to buy a new Titan fuel tank, I pulled the tank and was surprised to see that my tank was not a metal tank, It's polyethylene, I bought the truck in California with 60,000 miles it has 180,000 miles now. It was sold new in Canada, I expected the tank to be metal with the the liner coming off.
The two fuel filters in the tank are just about plugged solid I'll be removing them and repiping the return line. When I repipe the return line do I put the duck bill on the end or just leave it open? Also I searched the web for hours looking for a stock size polyethylene tank with no luck. On the bottom of the tank I found The ford part #s. I'm going to siphon the fuel out of the tank today. and reinstall....
Ford 7.3L Power Stroke (1999-2003) :: Engine Coolant Temp Sensor?
I drove my 99.5 7.3 F-350 1 mile to a friends and hooked it to the OBDII to get a code for my abs light.it had not been drove all day. we hooked into the pcm and he noticed the temp at 375* it was idling. is this right he didnt think it should have been that high???Will the engine coolant temp sensor, if it were bad,show a high temp of 375*? On the OBDII it showed a temp of 375* .....
View 14 RepliesFord 7.3L Power Stroke (1999-2003) :: Code P0197 - Engine Oil Sensor Low
Ok I have a p0197 engine oil sensor low.. Temperature is cold right now and truck was not plugged in.. Truck surges when started unless I give some steady throttle and oil warms up. Also service engine soon light comes on.. Oil change soon but been a while.
View 9 RepliesFord 7.3L Power Stroke (1999-2003) :: Sensor Behind Bumper Area Of Truck?
What the sensor is for? In the course of removing the rough country bumper from my truck and installing the 2005-2007 factory front end I found this guy hanging out with wires cut. I haven't attempted to wire it back up because I want to know what it is first. It would appear that the sensor is suppose to be screwed in to something.
View 5 RepliesFord 7.3L Power Stroke (1999-2003) :: Exhaust Back Pressure Sensor
So I have a non ebpv pedestal I was going to clean my sensor on the front because my mileage has went down a bit. My question is is this even worth doing since the valve is not there anymore I have got mixed answers trying to look it up some say it still affects the mileage some say it won't. I cleaned it once about 10 years ago. I have an AE also how do I test it and what should it read if I do need to clean it or replace it?
View 3 RepliesFord 7.3L Power Stroke (1999-2003) :: Replacement Of Throttle Position Sensor?
Ford catalog does not list the TPS for a 1999 7.3 Super Duty as a separate replaceable part which leads to replacing the whole throttle pedal assembly. I found this to be incorrect. If you have a throttle pedal assembly with separate TPS (separate 3 wire connector) and IVS (Idle Validation Switch 2 wire connector) just the TPS can be replaced.
This is a pic of my 99 with new TPS installed : [URL] .....
Without removing the whole assembly you only need to remove the 2 T25 screws and the connector to replace.
Since this part is listed for more then 20 Ford trucks I figured it would work in my 99 7.3. I bought a brand new TPS from Pete (F250_) that he could not use. He has a 2002 with one 5 wire connector. It works perfectly in my 99. Not sure if it will work in a 2000 or 2001 but if the TPS and IVS each have their own connector it should. Make a visual inspection to be sure.
Part DY-967 or F4SZ-9B989-AA - Potentiometer
I was going to go with a Dorman TPS but like PartsGuyED likes to say "OEM Baby". The OEM TPS through Ed is actually cheaper then the Dorman.
Side-by-side pic of the old and new TPS. Only the center rotating part is different but it fits and works just fine. It also has a better fit so there is less slop and almost immediate response.
NewOldTPS.jpg?t=1269362105
By the way, the original TPS was working fine so I have no idea what the symptoms of a bad TPS are. Since it was available I replaced it to have a spare and to see if this one would work. Both Pete and I thought it would and we were right.
Ford 7.3L Power Stroke (1999-2003) :: Reinstalled Sensor Now ABS Light Stays On?
Trying to be proactive seems to have backfired on me. What to do? Pull sensors and clean? Checked codes points to both left and right sides.
View 14 RepliesFord 7.3L Power Stroke (1999-2003) :: Faulty Coolant Temp Sensor Effects?
Plugged in my ScanGaugeII on a whim, it's usually on my 6.5 Suburban daily drivers, but was curious to monitor a few things on the 7.3
Noticed this right away, coolant temp reading a solid -40*F and never budging.
Ford 7.3L Power Stroke (1999-2003) :: 2000 - Overdrive Light Flashes - RPM Sensor?
Auto trans. The Overdrive light flashes on the Selector lever. Never stops.I put tape over it because it is annoying. Especially at night. It goes into overdrive no problem.
A Couple of times it did not flash and was stuck in first till I manually shifted. Then the light started flashing again and works normal. What now......RPM Sensor?