Someone help .... Please :(

[John]

need to know where the crank angle sensor is located .. For some reason i am not getting any Spark from plugs which have already been changed and celenoid and computer has been changed so this crank angle sensor is next...also If you have any other ideas on what to do to fix this let me know.and another thing is it does spark sometimes, but then after ran for a while it stops getting spark. Thank You for you Help ..

John
91SHO

 

[sdpatt]

The crank angle sensor or crankshaft position sensor (CPS) is located at about the 2 o'clock position on the block behind the crankshaft damper at the front (passenger side) of the engine.

To access it, you must remove the roll damper, accessory belts, timing belt covers and the crankshaft damper. There are two stainless steel, Phillips headed screws that secure it to the block.

The routing of the connector up to the top of the intake is somewhat challenging, but there is more room for its passage to the forward side of the fuel rails. I thread a speaker wire down through the tangle of wires and parts and tie the end to the upper CPS connector. Then I just pull it up through the tight spots.

The best part for this application is the Wells SU242 from AutoZone or AutoZone.com for $42.99.

 

[John]

This sounds like a lot of work , is there anyway to test it before i do this ?Could there be any other thing that could cause this problem? ,and if i end up changing the crank postion sensor it sounds like it would be a good time to change the timing belt and the crank seal....

Thanks,
John
91 SHO

 

[Shoman94]

John:
This sounds like a lot of work , is there anyway to test it before i do this ?Could there be any other thing that could cause this problem? ,and if i end up changing the crank postion sensor it sounds like it would be a good time to change the timing belt and the crank seal....

Thanks,
John
91 SHO

When you turn the motor over(trying to start it) does the tach bounce to 200-300 rpm?

jason

 

[John]

does nothing starter motor turn but know sparks...

 

[Shoman94]

John:
does nothing starter motor turn but know sparks...

I understand that you have no spark. What I'm asking is if the tach moves at all while you are cranking the engine.

Jason

 

[John]

No rpms Not at all ..
John
91SHO

 

[naval-avi8or]

John:
No rpms Not at all ..
John
91SHO

You've just narrowed it down to your CPS. Double check the connector to make sure its not faulty or corroded. But you will still need to change it to totally fix the problem.

 

[Shoman94]

John:
No rpms Not at all ..
John
91SHO

While your in there, do other maintanance items that haven't been done for a while. When was the last 60/120K done?

Jason

 

[John]

im not sure i have only owned the car for about 8 months . Yeah i think i will do check ups on everything else while i have every thing apart .. but isnt there a way to test that crank position sensor before i take everything apart ?

Thanks,
John
91SHO

 

[Shoman94]

John:
im not sure i have only owned the car for about 8 months . Yeah i think i will do check ups on everything else while i have every thing apart .. but isnt there a way to test that crank position sensor before i take everything apart ?

Thanks,
John
91SHO

Well, you can run the KOEO(Key On Engine Off test)
That should give you the code for the CPS.
http://www.dalidesign.com/hbook/eectest.html

 

[naval-avi8or]

Ya but you got to know what signal parameters it is supposed to put out.

 

[Slo-Sho]

By turning the motor over, the tach should read 200-300 rpm's. You stated that the tach does nothing. You just checked it.

 

[naval-avi8or]

Think about this he buys a 60 dollar part and it doesn't fix it so he trouble shoots some more and he's got a broken/cut wire down stream in the harness. Tach still wouldn't work.

 

[Shoman94]

slosho:
By turning the motor over, the tach should read 200-300 rpm's. You stated that the tach does nothing. You just checked it.

Not so if its a bad connection.

John: This is the only manual test I now. At the connector from the CPS the cranking voltage is: 0.3-1.2 volts AC so this measurement would be while the engine is cranking.

Jason

 

[naval-avi8or]

Thanks Shoman94 I was hoping someone would help out on that comment.

Also what pub are you getting the output for sensors from I got to get me one.

 

[RStalveyARFF]

according to autozone's site, procedure SU19 in the wells manual tells you how to check the CPS. I'm guessing autozone would have one of these manuals, since the sensor they sell is wells.

 

[sdpatt]

Here is a link to a Wells Manufacturing site desribing the operation and testing of Hall effect sensors.

http://www.wellsmfgcorp.com/counterpoints/Counterpoint3_1.pdf

If you have no spark and no tachometer indication, you have described a failure in the spark event triggering circuit: CPS, DIS. Even if the CID sensor had failed, there would still be spark, just not sequenced correctly all the time.

 

[fredhurderjr]

You can also trigger the CPS manually with a metal ruler (or similar magnetic metal piece - don't use non-magnetic stainless steel, for example); disconnect the CPS from the harness. Plug in your new one. With the car in neutral, p-brake on, someone in the car with the clutch in, turn the key to "on", but not start.

slide a metal ruler through the CPS. You'll hear a click - you just got spark on a cylinder.

This will "rule" out (pun intended!) the broken wiring harness, if anyone has any doubts that it's actually the CPS.

 

[Shoman94]

fredhurderjr:
You can also trigger the CPS manually with a metal ruler (or similar magnetic metal piece - don't use non-magnetic stainless steel, for example); disconnect the CPS from the harness. Plug in your new one. With the car in neutral, p-brake on, someone in the car with the clutch in, turn the key to "on", but not start.

slide a metal ruler through the CPS. You'll hear a click - you just got spark on a cylinder.

This will "rule" out (pun intended!) the broken wiring harness, if anyone has any doubts that it's actually the CPS.

Thats fine and dandy if you have a new CPS hanging around. I doubt its a bad wiring harness but you never know. What my main concern was the connecter itself that was corroded.

Jason