Ok.. here's an issue I've been experiencing on and off, and now am finally motivated to track down the cause.
Back story and info:
truck is a 99 f450 with the 7.3 powerstroke diesel. ( there is an early 99 and a late 99.. some different lights show up on the dash..e tc. mine is the late 99 AFAIK ).
Started life as a cab/chassis
Had a chip installed ( the kind that physically plug into the card edge on the computer ).
Few months ago truck died.. would stall now and then.. I replaced the CPS, then like a day later died dead. had it towed to the diesel shop, nada on the obd port, like computer was dead. they popped out the chip and it came back to life immediatly. I put a flashpaq on it to make up for chip.
All was fine for a bit, then I noticed it stalling again.. and finally figured out the commonality. RAIN. If I drive the truck in the rain or right after the rain when there are puddles or road water.. she will stall like the key turns off. you can start right back up. Actually.. to clarify.. if you are at idle, or say, under 800 rpm, it will stall. if you are over that rpm, you get a huge miss. if towing a big load, that huge miss is plenty enough to feel as a shudder going down the road, and you know it tried to stall.
It's not water int he tank. I have an extra filter and transfer tank.. no water period and I treat it. no water in the cup..e tc.. etc.
I know it has to be electrical and water.
Truck runs like a charm dry. Starts as fast or faster than my wifes new 2014 E350 gasser. ( engine is not tired, it's crisp and powerfull, responsive.. no smoke except when you expect a diesel to smoke on accel etc. )
This truck is not a dialy driver anymore. it mainly stays parked unless I need to move something 10K or heavier. like haul a big peice of equipment on the flatbed, or move a few tons of hay. it's good for heavy loads. i have all the toys for it.. pyrometer, extra gauges, better tranny and power steering cooler, intake upgrade filter system transfer-tech fuel gauge to measure main and aux tank, 4.88 rear, custom upgraded rear, 19.5" rubber, add on air bag rear suspension, has had full syn fluids all around from mile 1. When dry, she screams...
Well, florida has been getting rain daily for months and the truck is virtually useless as she sets. I have not ruled out the CPS, as I changed the first one ( which was really the second one, as the one she came with was replaced with a international one when there was the issue with the grey vs black ones and coroded terminals ).. this new one i put in was a napa one.. and I put it in thinking it might be it, then found out it was the computer/chip.. so I have not ruled out the cps i JUST put in might now be the rain issue.. but have never heard of it.
Any ideas?
I didn't remove the old chip, the guy at the diesel shop had it out by the time I made it there. truck was towed and I got a ride, and the had it fixed when i got there. tow cost more than the 'repair'.
My research says that computer is metal cased with parting halves and is somewhere under the left fender?
could that be getting wet?
any p'stroke 7.3 owners have similar experiences with what seems like a water/electrical issue?
I'm doing everything with my 99 350 , also a 7.3 pstroke.. but she's been used hard and put away wet n tired her whole life, and won't pull 14000# of hay like the 450 will. she also has a 4.1 rear. etc. She gets the job done, but tranny is getting tired... but.. she drives ok inthe rain... ( when the old wiper controll decides to play nice ).
any ideas?
Back story and info:
truck is a 99 f450 with the 7.3 powerstroke diesel. ( there is an early 99 and a late 99.. some different lights show up on the dash..e tc. mine is the late 99 AFAIK ).
Started life as a cab/chassis
Had a chip installed ( the kind that physically plug into the card edge on the computer ).
Few months ago truck died.. would stall now and then.. I replaced the CPS, then like a day later died dead. had it towed to the diesel shop, nada on the obd port, like computer was dead. they popped out the chip and it came back to life immediatly. I put a flashpaq on it to make up for chip.
All was fine for a bit, then I noticed it stalling again.. and finally figured out the commonality. RAIN. If I drive the truck in the rain or right after the rain when there are puddles or road water.. she will stall like the key turns off. you can start right back up. Actually.. to clarify.. if you are at idle, or say, under 800 rpm, it will stall. if you are over that rpm, you get a huge miss. if towing a big load, that huge miss is plenty enough to feel as a shudder going down the road, and you know it tried to stall.
It's not water int he tank. I have an extra filter and transfer tank.. no water period and I treat it. no water in the cup..e tc.. etc.
I know it has to be electrical and water.
Truck runs like a charm dry. Starts as fast or faster than my wifes new 2014 E350 gasser. ( engine is not tired, it's crisp and powerfull, responsive.. no smoke except when you expect a diesel to smoke on accel etc. )
This truck is not a dialy driver anymore. it mainly stays parked unless I need to move something 10K or heavier. like haul a big peice of equipment on the flatbed, or move a few tons of hay. it's good for heavy loads. i have all the toys for it.. pyrometer, extra gauges, better tranny and power steering cooler, intake upgrade filter system transfer-tech fuel gauge to measure main and aux tank, 4.88 rear, custom upgraded rear, 19.5" rubber, add on air bag rear suspension, has had full syn fluids all around from mile 1. When dry, she screams...
Well, florida has been getting rain daily for months and the truck is virtually useless as she sets. I have not ruled out the CPS, as I changed the first one ( which was really the second one, as the one she came with was replaced with a international one when there was the issue with the grey vs black ones and coroded terminals ).. this new one i put in was a napa one.. and I put it in thinking it might be it, then found out it was the computer/chip.. so I have not ruled out the cps i JUST put in might now be the rain issue.. but have never heard of it.
Any ideas?
I didn't remove the old chip, the guy at the diesel shop had it out by the time I made it there. truck was towed and I got a ride, and the had it fixed when i got there. tow cost more than the 'repair'.
My research says that computer is metal cased with parting halves and is somewhere under the left fender?
could that be getting wet?
any p'stroke 7.3 owners have similar experiences with what seems like a water/electrical issue?
I'm doing everything with my 99 350 , also a 7.3 pstroke.. but she's been used hard and put away wet n tired her whole life, and won't pull 14000# of hay like the 450 will. she also has a 4.1 rear. etc. She gets the job done, but tranny is getting tired... but.. she drives ok inthe rain... ( when the old wiper controll decides to play nice ).
any ideas?