[hoytshooters1]

is it possible to delete or bypass the crank position sensor on a 99' ?
thanks

 

[Mopar1973Man]

No. Sorry.

 

[me78569]

real question is why? Another case of the wrong motor bought?

 

[Mopar1973Man]

real question is why? Another case of the wrong motor bought?

:confused013:

All 98.5 to 02 engines all have a crank sensor just depends in what year where it was placed. Early was on the crank above the starter and the later was on the gear case for the cam. It was the cam sensor that was no longer use in the later series. But crank sensor is mandatory equipment.

 

[me78569]

interesting I knew 98-00 had both a cam and crank sensor, but I thought the late trucks only had a cam sensor. Guess the late truck only have a crank. Which would honestly be the same thing, reads crank position regardless of on the cam or crank.


Doesn't really matter which is on the engine I suppose.

 

[Junkman]

I'll have to check FSM. My understanding is 01 used cam sensor in lieu of crank sensor.. Crank sensor is not behind starter beginning in 01. I don't think it was moved.

 

[TFaoro]

Might want to check that guys... I think mine only has a cam sensor right by the VP.

 

[me78569]

that's what I recall also, but my memory is full of stuff that doesn't matter and might not be true.

 

[Mopar1973Man]

Might want to check that guys... I think mine only has a cam sensor right by the VP.

Same here my 2002 only have the cam sensor. This is the exact same wire that the crank wire use though... Look and see for yourself.

Mopar1973Man's Dodge Cummins Articles - Dodge Ram Turbo Cummins 24 Valve Engine Wiring

 

[TFaoro]

:confused013:

All 98.5 to 02 engines all have a crank sensor just depends in what year where it was placed. Early was on the crank above the starter and the later was on the gear case for the cam. It was the cam sensor that was no longer use in the later series. But crank sensor is mandatory equipment.

This post said otherwise... Just a little confusing! :thumbsup:

 

[thumper 549]

What i do not understand -the pump can be "hot wired " (no sensor input and our trks will start and idle.)
No input from any sensor.
I find that not logical, but i have done it looking for the bad VP44 as per (blue chip)

 

[Mopar1973Man]

This post said otherwise... Just a little confusing! :thumbsup:

Yea its a bit confusing in text...

Well its true... Crank sensor is on all 24V truck. The early version had the multi tooth tone wheel on the actual crank. Then later on they move the tone wheel to the cam. The funny part is its still a crank sensor even though its call a cam sensor. If you check with the wiring diagrams you'll see the exact same pins are still use from early to late. It just the old school cam (single tooth) was gotten rid of. So regardless of what its called its still a tach signal just getting from two different locations on the same wires going to the same pins in the ECM.

As for the early cam sensor with a single tooth tone wheel I think that was only a TDC reference pulse that was it. :confused013:

Here you go... 1999

http://articles.mopar1973man.com/images/2ndgen24v/wiring/1999-Dodge-Wiring-Pg3.jpg

http://articles.mopar1973man.com/images/2ndgen24v/wiring/1999-Dodge-Wiring-Pg2.jpg

then 2002

http://articles.mopar1973man.com/images/2ndgen24v/wiring/2002-Dodge-Wiring-pg3.jpg

http://articles.mopar1973man.com/images/2ndgen24v/wiring/2002-Dodge-Wiring-Pg2.jpg

 

[Mopar1973Man]

What i do not understand -the pump can be "hot wired " (no sensor input and our trks will start and idle.)
No input from any sensor.
I find that not logical, but i have done it looking for the bad VP44 as per (blue chip)

Because the PSG is programmed with basic information to fire up and idle (or high idle). But that's it all other functions come from the ECM.

 

[thumper 549]

Yes , it does fire up, but with out knowing where anything is. I find it oxymoronic.
It would seem someone somewhere would be smart enough to come up with a bypass to get these to run in the stupid mode at road speed. (in case we had to make it at least to home)

 

[Yankneck696]

The ECM compares the cam/crank sensor to the tone wheel in the VP44. If not correct, it will be in limp mode.

Ed

 

[Mopar1973Man]

The ECM compares the cam/crank sensor to the tone wheel in the VP44. If not correct, it will be in limp mode.

Ed

Hence the P1690 code...

 

[thumper 549]

OK, perhaps a dumb question, if the VP 44 knows where the cam or crank is , it seems redundant to have an other sensor .
My 98.5 has both. Can i get rid of one?

 

[Mopar1973Man]

I advise not to go down that nasty road. You'll find all kinds of issues attempting to alter ECM's and using different ECM's to alter sensors and what's used. This why people doing engine replacements go hung up with early vs. late engine because of this issue. Best to leave it as designed.

 

[thumper 549]

OK , Not going to reinvent the wheel here as computer stuff is my weakest link in auto stuff.
I was just wondering if it had been done.

 

[Mopar1973Man]

I'm pretty sure it has been done but typically someone with a DRBIII tool and some programming knowledge did some tweaking to get the software just right.