Ford 7.3L Power Stroke (1999-2003) :: Engine Choppy - CEL On - Maintenance?
Jun 24, 2016
My truck is for the most part fine, but it's doing some strange things and I'm wanting to get some opinions before I go and tow a trailer 300 miles next weekend.
Last weekend when I started my truck I had the CEL on for about a minute, then it went away. Not sure if it was an influencing factor, but it was sitting outside in the sun in 100 degree weather before I started it. Truck ran fine for the 300 mile trip home that day. Two days ago, I drove to my parents house. It ran fine the whole way there and as I pulled up into the driveway, the engine randomly got really choppy like it went down a couple cylinders or something. Not sure how to explain it. I pulled forward the last 50 feet or so I needed to drive with the engine chopping up, parked, unloaded the stuff I brought, and fired the truck back up to go home. It was running perfectly fine again and drove back home without an issue like nothing ever happened.
Is there any components I should be checking out on the truck before I make my next trip 4th of July weekend or just brush it off as being a fluke? Truck has 230k miles on it.
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Last November I forgot to plug my truck in and it got down to 0, my girlfriend tried unsuccessfully to jump start it. When I got home I jumped it and got it running. I took it down to a heated shop to troubleshoot the glow plug circuit. I discovered it was not getting 12v to the glow plug relay. Also I started it and tried to back it up in the shop, when put in reverse it killed the engine, not lugged it down it was like you shut the switch off.
Also I discovered if you turn the lights on it kills the engine immediately. It will not crank with the lights on either. So far I have replaced the computer,ignition switch,batteries, and cam positioning sensor. Now comes the weird part!! I decided to get it running and pull the bulbs out of the back up lights I pulled the drivers bulb first then the passengers side bulb. When I pulled the passengers side bulb it killed the engine.
It is not my daily driver so it still sits in my shop. I have a hunch it's a ground issue but I've checked and cleaned up all the grounds I can find and it still has the problem.
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So on my way home today I lost all power, the engine shut of and i coasted to side of the road. Went to try and start, nothing. When key is in the crank position the gauges were jumping all over the place, also accompanied by a lot of clicking from behind the dash. Nothing happened when tried to crank. No power to windows or even emergency flashers.
So i get it towed home, and of course it turns over. But this only lasts about ten seconds, then dies. I could do that a few times and then back to no power at all. Even at times with the keys out of ignition it will still click and make a lot of noise.
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While pulling onto the highway and pulling pretty hard lost engine power all boost then engine truned off. Top of engine is covered in oil..... What happened?
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So after hitting a pothole, it would seem like half the engine lost power, after some searching around, i found that i would most likely be the harness inside the valve cover that has lost connection.
Its the right side, so i would need to take of the turbo pipe, and probably something else to get to it.
Since i'm doing this job, what to check out along the way? I want my 7.3 to be as reliable as possible.
I will probably ask some questions along the way, it can be a challenge sometimes to own a car that not many mechanics are familiar with, but as i have read online, this should be a very straight forward fix.
Can the harness be upgraded so it doesn't happen again? Its an 02
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Truck started losing power then service engine light came on, drove about another mile then it just stalled ( almost home lees than a 1/4 mile). Got out open hood oil everywhere on top of motor. Looked under truck and oil all over the road. Looked back where I was driving a line of oil as far an I could see. Checked oil barely any on stick. Where should I start hpop or plug?
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What I know the truck was running normal except if I stomped the gas pedal and let off it would not respond again until I shut off keys and restarted this was a month ago now the truck sounds like it has a lope tune.
When I hit the gas pedal it blows white smoke and if I press the gas while idling or driving it floods out I did the spray bottle test on manifolds the drivers side was plenty hot the passenger side is cold you literally can touch while it's running.
The truck sounds like it's only running on 4 cylinders it has gotten so bad I parked the truck. Also this truck always had poor mpg 8 to be exact city hwy and towing nothing changed the mpg at all it used to blow out wet soot that would fall down on the truck and anyone standing near it.
Mods unknown pcu program 4in straight pipe with 12in stack harpoon mod in tank
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Cooler weather has arrived and my 2000 f250 won't start. Wait to start light is coming on, no power passing through the two relays on top of the engine. Are both of these for glowplugs? My 97 only had one. How do I diagnose relays on this truck? If you cross out the two relays truck fires right off so I know the glowplugs themselves are good.
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Moving my worldly goods from California to Oklahoma in a rented 26' box truck with my wife following in our '02 F350 loaded to the gills with my lathe, mill, air compressor, weld and assorted machinery. Just west of Deming NM it started to blow lots of white smoke and down on power. Some rattling noises from the engine when throttled up & won't reach 3000RPM.
Had it towed to an impound yard for storage. Plan on sending a flat bed to pick it up when we get to Tulsa.
Any experience with a tilt back trailer capable of loading & transporting this truck that weighs around 17,000 pounds? My plan is to continue on to Tulsa & make arrangements from there.
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Had coolant in oil, so pulled motor. Got used motor to replace it with, thinking about doing some work on it before reinstall.
Got bellowed up pipes, injector o-rings, front and rear main seal, and will use best parts from both motors to make one. I'll also shim injector armatures back to spec.
Should I do injector cups too? What else is recommended to do at this time? Both motors are 350k or so, I was on a budget at a moment and have to make it work with what I got.
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I put a 150 w converter into one of my 12-watt power female and all of a sudden when i turned the engine on my check engine light came on with 4 glow plugs bad and now won't pass smog. any way i can turn off the check engine light so it won't comes up on the smog test?
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I bought a 2002 body with a late 99 engine with lower miles a couple years ago. I knew it had an oil leak when I bought it. My other truck had a turbo pedestal leak. This truck has a small pedestal leak but it's not that much of an issue as there is little oil in the valley and next to nothing running down the back of the engine.
The other leak is getting worse. It has been leaking somewhere up front and coats the main steering arm off the steering box, the lower rad hose and the rest of the steering linkage. Last night after driving around 100 Kms I have oil running out from under the engine across the floor.
I changed the LPOP after thinking the front leak was from there. Unfortunately i don't think it was.
I am hoping it's the oil cooler and not the HPOP. One other thing is before yesterday's trip, I installed my homemade ccv mod off my other truck. I don't think the leak is coming from that either.
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So I posted a while back about fixing all the leaks I had and what I was going to do. I finally completed all the repairs and reinstalled the engine and it won't start. Cranked a bunch and checked oil level in hpop its good so I pulled plugs in oil rails there is oil present there, cracked the yellow valve on fuel bowel there is fuel there. unplugged the icp sensor and cranked more still no indication of wanting to start.
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I need a film crew to document this stuff, but here's what I've got. This engine had a cracked piston. It is currently torn down and ready to go to the machine shop. I ordered a powder coating set up, so everything that fits in the oven will get powder!
This engine will get cut/coated pistons, cryoed forged rods, 250/100's, waste gated T4/S369, head studs, 910 valve springs, smith bros pushrods, etc. We'll also be using a Southbend dual disc clutch in front of the freshly rebuilt ZF6.
Here's some of the shiny stuff.
I think I'll give up a little top end to spool faster. Especially since this is a 6spd build.
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I have been battling and issue with my 02 7.3 just shutting down on my at random times.
1st Time
Outside Temp: 100
Drove 5miles sitting at in idle in bimart parking lot truck shut down
Let sit overnight, went back started right up
2nd Time
Outside Temp: 100
Driving home sitting in traffic slow moving 5mph, truck shut down
Able to start up about 5mins later
3rd Time
Replaced CPS, Air filter, Fuel Filter
Outside Temp: 80
Hauling travel trailer up peak 35-45mph shut down
Allowed truck to sit 35-45mins started back up
Started hauling made it about half mile shut down
Got towed to flat land to unload trailer and haul the rest of the way
Returned to truck
Started right up 45mins later, drove it 30miles home without a problem
I am at a loss i keep reading and seeing HPOP, tin nut, IPR, EBR..
The last post I read was about the IPR : [URL] .....
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2002 7.3 rebuild and installed in the truck but won't start ... Everything is new other than hpop and injectors they came out of a perfectly running engine.
The truck is making enough oil pressure to fire the injectors the first couple cylinders then it quits kinda like a cold start with bad glow plugs. Fuel pump was working perfectly when the engine was taken out of the truck and is still building pressure enough to get some black smoke from the exhaust after cranking for about 15 seconds ...
The hpop reservoir full every time I check it and after cranking for about 15 seconds the oil gauge in the dash for the lpop jumps up to its normal place.
Injectors got new o-rings when they were taken out of the running engine. I'm not sure what else could be keeping the truck from starting.
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I've recently picked up a new noise. At idle the engine buzzes. It sounds like the vacuum pump running but coming from the engine (the vacuum pump is not running while this noise is happening). This noise could also be happening while I'm driving too but the RPMs bring up the engine noise so I can't tell. Nothing looks out of the ordinary and I haven't done anything different that would give me any direction (no off-roading). It was just there one day.
The truck doesn't seem to be running any differently (right now), just the buzzing. I just want to catch it if it's going to become something serious. An ounce of prevention is worth a pound of cure (not to mention the towing bill!).
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I have a 99 7.3 with 40,000 on a rebuild,injectors I don't know they do pass a buzz test. What happens is when driving say at 30 mph and I am not needing to give it throttle but i don't back all the way off the peddle sort of at a neutral point my engine will sound rough and seems like its not hitting on all cylinders.it runs great when i give it fuel and idles fine its just the point in between it runs erratic.last year when chasing a no power problem. I did rebuild the ipr, new fuel filter, icp and harness,cps and what fixed it was new fuel pressure regulator (brass was gaulded and causing fuel pressure to crash). No mods other than a bullydog tuner that never goes past #2 setting. I do have a auto ingenuity scanner, what to look for or already know what my issue is.
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The other day I had been driving about 3 hours and truck went dead then back on, it happened two more times in about 30 minutes.
(2001 F 350 Dually 7.3 A/T 2 wd.)
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What kind of engine oil temps are too high? I know pulling the other day it got as high as 220 but I honestly only have the gauge cause I got it for free. Whats happening at the different temps? I know for trans fluid but not for engine oil..
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I have been having a problem for a while now where my truck will miss/buck at WOT. This only happens at higher RPM's. From a standing start 0-60 it is fine. However when I downshift full throttle from about 50 MPH it initially goes, but then it will miss/buck consistently until I back off the throttle.
I have so far replaced the CPS, re torqued injectors, checked valve cover harnesses and fuel pressure stays in between 64-58 full throttle. No codes show up.
My truck runs great except as I described above. I would think an injector or two are bad, but the truck runs and idles great. My initial guess was that it was a fuel pressure issue, but fuel pressure holds strong. Could it be air in the fuel?
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