Ford 7.3L Power Stroke (1999-2003) :: Speedometer Stalling Then Moving / Stops At 38 MPH
Sep 17, 2015
My speedometer was intermittent for a while, stalling, then moving, but never above the actual speed. Now I turn it on, but as soon as I move, it travels up to 38mph then stays there until I turn off the engine, then it hangs for 4/5 seconds, then drops to zero.
I replaced the VSS in the rear diff, and the one on the tranny. I checked all fuses. There are no other dummy lights or indications. Bad ground? I'm hoping I don't need a new gauge cluster.
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I'm running 37s and need to calibrate it. But I don't want to buy a performance chip with the calibration tool?
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A few weeks ago i lost the speedometer and the abs light came on. 6 hours later when i got home I tried diagnosing it, but everything worked. Yesterday, the same thing. No speedo or odometer, abs light is on, and the OD off light is flashing. But the trans still works fine, going through all 5 gears and torque converter lockup. plus, pushing tho OD button turn OD off, hit it again and OD engages again. (the truck has a 5 speed allison trans in it) i put the scanner on it and got No response from module for the ABS module, the GEM/central timer, and Hybrid electronic cluster. There are no trouble codes, but it did show P0500 vehicle speed sensor A this afternoon on the way home, the speedometer and odometer came on and worked for .4 miles, then went out again. Where I should start?
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I drove the truck to work. It was fine. I start it up at quitting time and let it idle for a minute. When I pulled out of the parking lot and the od light started blinking. After about 8 miles I stopped at a red light. When the light turn green and I drove off the speedometer is working again. The od light flashed for another mile or 2 then stopped.
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This truck has done it since I got (6 months ago). When I take off from a stop that is a clunk. It a bit like towing a trailer with surge brakes. Do they all do it? 2000 Extend cab 4X4 auto 235K miles.
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This morning my 02 decided to turn the ABS light on, and start bouncing the speedometer. plus, the OD light is flashing when stopped with foot on the brakes, but the trans is shifting fine. Nothing changed on the truck except almost 3 inches of rain fell last night. Will AE tell me if the VSS is going bad?
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Speedometer not working and O/D light blinks, I have a 450 and a 250, 99 and 2000. On 450 this is an intermiting problem. Stop truck turn ignition off, restart and it all works now. Just started on my 250 and stopping and turning ignition off cures the problems for a few seconds, after i get moving the speedometer doesnt work and then light starts blinking again O/D light. Where do I need to start?
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So the truck has been stalling out and dropping power randomly, symptoms pointed to needing the 50 cent mod, changed the cps for cheap insurance and peace of mind just in case it wasn't the uvch, no dice. So last night I yanked valve covers for the first time here's what I did while I was under there, check my work.
1st I ohmed out injectors thru the 42pin harness according to tuglys sig link. My meter would only go down to a 0.4 when testing the test leads just to each other
DS injector ohms
#2 3.5
#4 3.4
#6 3.6
#8 3.6
PS injector ohms
#1 3.6
#3 3.6
#5 3.5
#7 3.6
DS glow plug ohms
#2 prong to ground 2" away 0.9 ; white connecting wire back to gp relay 0.3
#4 0.9 wire to relay 0.5
#6 infinity ohms up thru highest meter setting, checked multiple times and different ground spots,(replacing tonight) wire to relay 0.5
#8 0.5 wire to relay 0.5
PS glow plug ohms
#1 1.0 ; white wire back to relay 0.6
#3 infinity multiple tests as well (replacing tonight) wire to relay 0.5
#5 0.9 wire to relay 0.6
#7 1.0 wire to relay 0.7
Next up, ebp sensor was reading 1.9 higher than map/baro koeo, gently cleaning sensor earlier didn't work. Installed new motorcraft, will check it with Torque pro koeo once the batteries are reconnected
Next I checked the uvch connections which felt good, darn it, maybe a smidge of movement from the DS, but nothing halfway disconnected or anything. Hmm. I ground down the quarters to the top of his head and installed.
Next I torqued down the 4 bolts per cylinder of the rocker arms at 20 ft/lbs, all were perfect and snug
Next up, injector torque. I've read on here below 50, or 80 in/lbs depending on different threads and opinions that I would need to replace o-rings.
So I set the in/lb click torque wrench at 50 in/# and tested the wrench's click on the higher torqued rocker bolts, then checked all the injectors, all were good
Reset for 80in/lbs, tested, then hit all injectors, #6 almost budged but clicked immediately before the handle moved
Reset for 100 in/lb, tested on larger bolt, 2 injectors took a 1/8 turn;
Reset for official spec of 120 in/lb , tested wrench, all injectors took 1/3 to 1 full turn
Reset for 130 in/lb (above official spec, but highly recommended on here by those way more knowledgeable than me on our engines) tested on a larger bolt, slowly and carefully gave all injectors almost an extra 1/2 turn to click; whew, finally a relaxed sphincter.
At this point I knew I needed to buy 2 glow plugs today, replace, then I'll check all glow plug torque at 14 ft/lb in one go, so I got everything ready for a hot torque after I do glow plugs tonight ("unloaded" the torque wrenches) and finally installed the RiffRaff AIH delete plug. My cell phone's alarm went off to get the kids ready for school, so hit the snooze and got everything put up. Now for a nap, then buy 2 Motorcraft GP and check back on here before going back at it tonight.
I also checked the turbo for play in all directions, was nicely solid and spun smooth, no wheel damage. Up pipes and well basically everything exhaust under hood had zero signs of soot/leaks with inspection mirror.
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My "01 6 speed has started stalling after spooling down. Example, coming down a grade in a lower gear and then push the clutch in it will die. Where do I need to look? I've recently done injector o rings and normal service. No change at all. No other issues except a very touchy throttle. It's pretty disturbing to be pulling a heavy load, have to get in the brakes hard, push the clutch in and the engine dies. Not a good day.
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When I start my truck it takes 30 seconds or so for the truck to start moving... especially when in reverse. If I give it some gas it doesn't take quite as long. I am not a transmission guy. I assume it has something to do with building pressure but I don't know what would be the cause. The fluid is full and looks good.
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This just started happening last week. When I put the truck into reverse, the engine lugs down and dies. It' as if the AT is fully engaging reverse gear with no clutching action. If give the truck a bit of pedal, I can put her in reverse and back up without issue. Going forward into Drive has no issues.
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2002 e350 7.3 diesel transmission... At 7 miles the speedo began bouncing and truck drops into second. Parked it 30 minutes, stated up no problem until 8 miles and the it started again. Have checked most of the electrical, changed speed sensor and transmission position sensor. Only error code 2-3 rd gear mismatch.
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Early 99 7.3 manual 6 speed. 224,000 miles. Truck starts great and runs great at idle. Starts out in gear just fine and seems to have plenty of power. It will act just like the key is turned off about a mile down the road. Will restart after extended cranking or letting it sit for 15 minutes or so. P1249, P0340, and P1280 codes pop up. Had a professional shop work on it and they changed out the CPS and IPC with factory parts. When i picked it up it had an SES light on but was running fairly well. When I looked under the hood the IPC had been cracked on the plastic part. Replaced it with another new one and it ran fine for 3 days, even pulling loaded hay trailer. Now when driving it, it cuts out for a second or two. It does that every couple miles until it stalls out completely. Restarts after 15 minutes and runs fine. Same codes are showing up.
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I've had this 01 7.3 for a few months now. When I first purchased I dropped new battery's, couple glow plugs, and wire harness going to the Pass side valve cover. it has 150k on it and an Edge tunner.
My first problem was about 2 weeks ago, it was raining and i was making a turn at about 5mph And all power shut off. I put it into park cranked 3times started up and the tuner stayed off for about 3minutes. I ran to auto zone and picked up a cps (I've recently found that oem is the only way to go?)
I made a trip about 2hrs locked the CC in about 70mph and the boost was going well over 12psi. this seems crazy because i usually dont get it over 4psi. I drive it with a light foot. on my way home i was pulling a trailer about 8000lbs load driving about 5mph out of the lot it shut off again. Started right back up and made the trip home fine. With the exception of the erratic boost.
Yesterday it shut off at about 40mph and turned back on its own. I am not throwing out a lot smoke doesn't have problems starting, I did a once over on the wire harness's and nothings jumping out to me.
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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....
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My 2,000 7.3 with 150K miles have been doing good until the last four weeks. It randomly stalled and once would not start when I got back to it after a 30 minutes lunch break. The stalling happened at unpredictable rpm. Sometimes it stalled at near 2000 while I was still in low gear, other time it stalled when I was cruising on street at 30 miles/hr. Twice it stalled while I was at stop light and at idle speed.
The CPS is new. I replaced the fuel filter and it quit stalling for about 100 miles, I was so happy thinking the problem was fixed but then it stalled again.
Each time it stalled it would take about one minute resting before I could successfully start it again. If I tried to start immediately it simply would not start.
Do you think perhaps it is the two filters in the fuel tank being the culprit? I doubt the filters were ever replaced. I looked around and found a Hutch mod where these two filters were removed. An in-line filter was installed on the frame between the tank and the fuel pump. I just cannot understand why Ford engineers place filters inside the tank, which requires either dropping the tank or removing the truck bed in order to change the darn filters.
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A couple weeks ago my 01 7.3 with 265,xxx started ideling rough and stalling. I had driven in all day Sunday and the next day it started out of the blue! It would barely start idle rough and stall out no CEL. I have singed changed the icp, fuel filter and I have checked oil level. Also used fuel cleaner. Still had no luck. When I changed the icp sensor the check engine light came on and was no change I then got a ford oem camshaft sensor and my truck fired right up but still sounded like it had a little miss here and there drove it for a few weeks fine now back to the same thing it will start up and idle fine for 10 seconds then start the rough idle but won't stall out anymore just idle rough. I am stumped I can't get any codes to pull up and if oriellys uses there scan tool while the truck was running it would shut the truck off! I can't find any answers.
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The truck is a 2002 F450 7.3 diesel with about 120k Miles.
While driving from 45-70Mph the truck engine stops for about 1 second and starts back up by itself. I thought the problem was the cps so I replaced it with a ford CPS. Today the problem still persists. The truck engine turns off and comes back on, the tach drops to 0 rpm and so does the speed.
The Check Engine Light comes on and so does the water in fuel light and so does the Check Gage light. After I turn off the truck and start it back up the truck does not show the lights.
I believe I found the issue, but can't look into it today. While I was moving some of the wires on the truck I found out that if I move the red/black bunch just a little bit the truck shuts off and comes back on when i let it go.
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2001 f350. 7.3 has 350k on the engine. Last week it cut out and stalled it was about 15 degrees and though.. fuel had jeld... it warmed up.. didn't happen again. Then two night ago.. happened 4 times in a row then it was fine. yesterday a dozen times at least. It stalls but restarts itself (roll starting i guess) the water in fuel ,CEL and wait to start lights come on and then go off. We started with fuel filter, have changed the cam position sensor (yes with ford part not part stores) and now have also changed the Injection pressure sensor (also with ford part) while it needed changed as it was leaking oil the truck is Still stalling.
My dad is a technician He hooked his computer to the truck.. nothing. He was able to get the truck to recreate the problem with the scanner hooked up. When it stalls if he holds the throttle down the truck stays at an idle and the CEL, wait to start and water in fuel lights are on. It decelerates and puts along as nice as you please with the fuel peddle to the floor! let off the accelerator, lights go off and it recognizes the throttle again. No codes at all. hes thinking its the pcm telling the icp to shut off fuel. What would cause it to do that?
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I have a 1999 f450 7.3 diesel that surges and will stall but will start right back up again and drive. It does this over and over but all ways gets back to the shop. The engine starts good when cold so glow plugs are working correctly. What I have done:
Fuel filter change, check electric fuel pump but have not replaced it. I have replace camshaft sensor.
What I have found d by inspection:
Throttle pedal has 2 electrical connections one for the IVS and one for the TPS. I have experience on the 7.3 IDI diesels but very little on the newer injection system.
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Truck has been driving great for a long time and this afternoon after driving fine to work just died 3-4 times while trying to accelerate from idle. Engine restarts easily but the power is soft off idle, the injectors sound noisier and then quiet down and will accelerate decently once rolling but something is off I can tell.
Fuel pressure is read post filter and is good. Truck is well maintained with all the basics replaced in the last couple years. Could this be CPS going out even if it is only a couple years old? IPR is new in the last year, ICP sensor isn't leaking. Most recent change was a full tank of fuel yesterday afternoon and on a whim performing a boost leak check which was all good.
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