Re: Crank sensor questions
[Re: poorboy]
#2996677
12/19/21 11:10 AM
12/19/21 11:10 AM
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Joined: Jan 2004
Posts: 8,240 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,240
fredericksburg,va
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Crank sensor... this part had me chasing my tail for two years. After replacing every other sensor, at least 3 times (used parts from pic-a-part) then buying those parts new, still the Van (2001) would buck-jump all the time. Like turning the key off and on but never a code. Never replaced the crank sensor because it was new when I bought the van (looked new anyway). Last time at the P-A-P getting another throttle body and fuel rail I got the crank sensor (dirty but looked ok) too. Was going to change out all that stuff in their parking lot but being too hot just did the CS. That piece worked great, the problem all along. Found out they make 3 versions, one to just get to auction, 2- marginal and 3 the best. I had number one!! Cheap owner before. I’ve gotten rid of a few vehicles because I never could trace down their electrical problems, now I think this might have been the problem on those. Now the instrument cluster will die driving down the road (doesn’t affect engine running l) then pop back on when I blow the horn, go figure. Dodge has bad wiring big time.
Last edited by cudaman1969; 12/19/21 11:15 AM.
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Re: Crank sensor questions
[Re: Moparite]
#2996739
12/19/21 02:16 PM
12/19/21 02:16 PM
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Joined: Jan 2004
Posts: 8,240 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,240
fredericksburg,va
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With that amount of miles it would be good insurance to replace it. Keep in mind aftermarket sensors don't always work well so go with Mopar or Delphi. I would definitely go through the wiring if wiggling wires made a difference! Agree ^^^^
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Re: Crank sensor questions
[Re: SALEM1912]
#2996969
12/20/21 09:57 AM
12/20/21 09:57 AM
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Joined: Jan 2008
Posts: 2,226 ILLINOIS
volaredon
OP
top fuel
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OP
top fuel
Joined: Jan 2008
Posts: 2,226
ILLINOIS
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Just a quick note, if you truck has a tach and it is moving while cranking your crank sensor is not your problem. It maybe hard to see 4 or 500 rpm but it's a quick way to see. I have had sensors that by the time I went to the shop and back to the parking lot with a scanner if would fire up. Didn't pay attention to the tach, yeah the truck has one. The last truck that I had, where the crank sensor went out was a 97 1500 4wd again with the 318, shut that one off at the gas pump, and wouldn't restart but with that one I did get a code 11 out of the key dance. I pushed it up out of the way, called for a ride home for tools and my scanner, went by car quest and bought a sensor, then back to the truck and it fired right up, so I had my ride follow me home with it, to be sure I would make it, (it did) and dealt with it there. Better place to maybe be stranded than at a gas station parking lot. I went ahead and put the new crank sensor in anyway and that truck never gave me another no start the rest of the time I had it. When I replaced the engine in my wife's Durango at 260k (360/5.9) I put a new crank sensor in it at the same time just because I had it out and apart.
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Re: Crank sensor questions
[Re: volaredon]
#2997112
12/20/21 07:02 PM
12/20/21 07:02 PM
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Joined: Dec 2009
Posts: 20,631 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,631
in a cattle trailer down by th...
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The fuel pump should run for a few seconds when you turn the key on. If it does that and doesn't start then possibly a crank sensor. If the pump doesn't run then it's not a crank sensor.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Crank sensor questions
[Re: Moparite]
#2997117
12/20/21 07:10 PM
12/20/21 07:10 PM
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Joined: Dec 2009
Posts: 20,631 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,631
in a cattle trailer down by th...
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The cam sensor is used to tell the pcm where the motor is on start up. If that has an issue it will not start either. Pcm uses both sensors to start the engine after start it runs off the crank sensor.. And stay away from aftermarket junk sensors unless you like replacing them. I agree, the crank sensor tells the pcm when #1 & 6 are at tdc. The cam sensor tells it whether it is #1 or 6 firing.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Crank sensor questions
[Re: volaredon]
#2998137
12/24/21 09:49 AM
12/24/21 09:49 AM
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Joined: Dec 2009
Posts: 20,631 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,631
in a cattle trailer down by th...
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Well when it acted up I had no sound from fuel pump. When it runs I hear the pump run while cranking. Pump runs truck starts. Every time. Don't hear pump won't start. Hear pump also see Check engine light while cranking. Every time. Don't hear pump run check engine light is dead while cranking. That doesn't address the issue, if the pump runs when you turn the key to the run position but doesn't run while cranking you can eliminate the ASD, pump, and probably the ignition switch as a problem. Something is not telling the PCM the engine is turning over.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Crank sensor questions
[Re: Guitar Jones]
#2998158
12/24/21 10:57 AM
12/24/21 10:57 AM
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Joined: Jan 2008
Posts: 2,226 ILLINOIS
volaredon
OP
top fuel
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OP
top fuel
Joined: Jan 2008
Posts: 2,226
ILLINOIS
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I didn't really notice whether the pump did anything when I first keyed up before cranking, I didn't leave the key in "run" long enough to pay attention, I was going straight from "off" to "start". I hate such issues as since I originally posted about this it has started and ran every time. I was hoping to have some kind of code even if it was a history code and not current. Though I know that the computer "forgets" some codes as soon as everything is good again, while others it takes something like 40 starts without a problem for the computer to forget other codes. So at this point I'm at a point of waiting for it to act up again. I did see a couple of wires down by the trans that had Nick's in the insulation but none went to anything that would keep it from starting, That is next to do is to fix those cuz they need fixed anyway. MY just lather those with some "liquid electric tape" since the defects are no more than simple Nick's in the insulation, nothing more. As I remember there were 2, and one went to the "4wd" indicator light down by the shifter. I don't drive it all the time any more like I used to even though I actually like driving this one better than driving my 99 2wd one, the suspension, road feel of real gearbox steering vs a rack and more. Given its age mileage and the fact I live in the worst of the salt belt (south Chicago suburbs) as much as I still like this truck I'd like to keep it around a while longer, and the best way being as how it isn't my only ride is to give it a rest when I can. I do wish I could find a nicer bed for it.
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Re: Crank sensor questions
[Re: volaredon]
#2998398
12/25/21 03:05 PM
12/25/21 03:05 PM
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Joined: Jan 2021
Posts: 975 rust belt
Moparite
super stock
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super stock
Joined: Jan 2021
Posts: 975
rust belt
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I did see a couple of wires down by the trans that had Nick's in the insulation but none went to anything that would keep it from starting, I had one of the wires for the 02 rub on the transmission and ground itself out. This caused the engine and dash to die(while driving). It was a task tracking it down!
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Re: Crank sensor questions
[Re: volaredon]
#2998399
12/25/21 03:07 PM
12/25/21 03:07 PM
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Joined: Dec 2009
Posts: 20,631 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,631
in a cattle trailer down by th...
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Just get in the habit of turning the key to run and listening for the pump before you crank it.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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