Question about 1994 Buick Roadmaster

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Crankshaft sensor need to know where the three wires caming from the sensor need to go to or where do they conect to what part of the ignition system

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  • pitacoche Sep 05, 2008

    v8 lt1 engine on a 94 buick roadmaser and the colors of the wires are orange red and pink and like i said i nee to know where do they conect from the cranckshaft sensor to what part of the ingnition system



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Where are these wires located? and what colors are they? is this a 3.1 or a 3.8?

Posted on Sep 05, 2008


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Where Is The Crankshaft Position Sensor For A 05 Chevy Impala With A 3.4 Engine?

You have two crank sensors. Was there an applicable trouble code? One should be down by crankshaft pulley. The other, on back side of engine, down low. One is two wire connector input to ignition module. The other is three wire connector, input to pcm.
I don't know exactly what kind of problem your having?

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97 oldsmobile achieva wont fire changed coil pack spark plugs cam sensor still wont start

Make sure battery has a full charge and battery connections all good.
If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
If you having a problem with more than one system, I want to check for rpm signal, that usually comes from the crank sensor. Not sure why you replaced cam sensor? I always want to check sensor wiring circuits before replacing anything. Don't replace anything unless your testing points in that direction.

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How do replace ignition control module in 1998 K-1500 5.0 liter vortec

This system does not use the ignition module used on the DI systems in the past. The VCM controller now controls the ignition control (IC) and bypass functions.
The crankshaft sensor, located in the front engine cover, is perpendicular to a target wheel attached to the crankshaft. The target wheel is equipped with slots situated 60 degrees apart. As the crankshaft rotates, the target wheel rotates past the crankshaft position sensor. The rising and falling edges created by the slots cause a signal to be sent back to the VCM. This signal occurs three times per crankshaft revolution and is referred to as the 3x signal for V6 applications. The signal occurs four times per crankshaft revolution and is referred to as the 4x signal for V8 applications.
The VCM then utilizes this 3x (V6) or 4x (V8) signal in order to provide the correct spark to the engine by way of the single coil driver module. The single coil driver module is basically an electronic switch that when commanded by the VCM, causes the primary coil voltage to breakdown, energizing the secondary coil and providing a spark via the coil wire to the distributor cap. The distributor consists of the following components:
The system consists of the following components:
Vehicle control module (VCM)


Ignition coil driver module

Ignition coil

Crankshaft position (CKP) sensor

Now which part do you want to replace ?

Cap and rotor

Camshaft position sensor

Gear drive and shaft

The camshaft drives the distributor shaft which rotates providing a spark to the correct cylinder by way of the cap and rotor. The camshaft position (CMP) sensor functions much like the crankshaft sensor previously described but provides only a 1x signal to the VCM. That is, for every 2 rotations of the crankshaft, there is 1 rotation of the camshaft. Note that the camshaft position sensor will not affect driveability. The sole purpose of the camshaft position sensor is to provide the VCM with the necessary information for the misfire diagnostic trouble codes (DTCs).

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Where is the distributor on a 2001 Cadillac deville?

Has no distributor - electronic ignition !
The electronic ignition system does not use the conventional distributor and coil. The ignition system consists of the following components/circuits:
Eight ignition coils

Eight ignition control (IC) circuits

Two ignition control modules (one per cylinder bank)

Camshaft position (CMP) sensor

Crankshaft position (CKP) sensor A

Crankshaft position (CKP) sensor B

Related connecting wires

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I've replaced everything to do with ignition spark on ky 1998 gmc pickup it has a 350 vortech engine why am I jot getting spark at the spark plugs ?

There is a spark control modal in the distributor most books do not tell you about it . if you have replaced everything else try that

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1 Answer

Rplaced crank sensor and sensors with kit from nissan. crank sensor has white dot. and light came back on and codep0335.

P0335 Crankshaft Position Sensor -Circuit Malfunction
Sorry but i think this fault is caused by a build up of residual magnatism in the crankshaft if a later model where the sensor is picking up from the crankshaft through the cylinder block type fitting ,what i do in cases like this is to try reversing the wires on the sensor it might just work although not always depending on make and type of ignition system .On some opel models i refit with parts from a scrapyard the earlier type of sensor which was on the front pulley as this clears the fault .Failing which ask at the dealers for help and what they recomend as a dealer mechanic will only work on their models and know them inside out unlike this aging old fleet truck mechanic .Who know very little about the modern advanced electronics used on modern vehicles with encyrption chips built into the cars computers to stop people like me from playing with them

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How to fix a coail pack on a 1987 Pontiac 6000?

Coil packs are replaced not repaired if found to be defective. ---prev.gif next.gif DISTRIBUTORLESS IGNITION SYSTEMS Starting in 1987, some models came with engines equipped with a Computer Controlled Coil Ignition (C3I) or Distributorless Ignition System (DIS). Fig. 1: Triggering system used on the C3I fast start system 86812034.gif
Fig. 2: Electrical schematic on C3I ignition system 86812031.gif Both DIS and C3I system consists of the coil pack, ignition module, crankshaft sensor, interrupter rings and ignition control module (ICM). All components are serviced as complete assemblies, although individual coils are available for Type 2 coil packs. Since the ICM controls the ignition timing, no timing adjustments are necessary or possible. Fig. 3: Wiring schematic used on the C3I ignition system 86812032.gif Fig. 4: Notch effect on the output signal used on the crankshaft sensor 86812033.gif
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Oct 09, 2010 | 1987 Pontiac 6000

1 Answer

No fire to the plugs

Well let me give you a brief understanding of the electrical ignition system.

The PCM controls the ground circuit for the ignition coil ground circuit. So basically the PCM determines when to open and close the ground circuit for each individual ignition coil, therefore making it give power to the spark plug or not.

The ignition coils get there power from a power distribution center which as an ASD (Automatic Shut Down) Relay located inside of it. So your problem may lay within this.

Also, like you said, you may need to check the crankshaft and camshaft sensors because they give information to the PCM which then calculates the best timing for the system.

To check the crankshaft sensor first check the harness and test to see if the sensor is getting 5.0 volts. To do this you need to connect the positive end of a voltmeter to the orange wire terminal and the negative lead the the black/lt blue wire terminal at the harness connector. Then turn on the ignition and check the voltage. If voltage isn't right check the wiring between the PCM and the sensor.

If you are getting the correct voltage next check the sensor itself. You need to reconnect the harness to the sensor and you need an analog voltmeter. Then you need to backprobe the harness, which is sliding the probes from the meter into the wire side of the harness, if you meter has clips then get a sharp pin and slide into the harness and clip the meter to the pin.

Checking the Crankshaft Position Sensor

With the sensor connected, backprobe the gray/black wire terminal of the sensor connector to the positive lead on the analog meter and the negative lead connects to an engine ground. Turn the ignition key On and with a breaker bar and sockey manually turn the crankshaft clockwise. Do one full revolution and keep an eye on the meter, if you get readings of 5.0 volts then the sensor is good if not replace the sensor.

Checking the Camshaft Position Sensor

Again check the harness for the sensor first. The positive lead of an analog voltmeter connects to the orange wire terminal and the negative lead to the black/lt blue wire terminal. Turn ignition on and you should get approx. 5.0 volts. If voltage is incorrect check the wiring.

If wiring the harness is giving adequate power now check the sensor. Its the same idea used to check the crankshaft sensor but this time connect the power lead of the meter to the backprobe connected to the tan/yellow wire terminal and the ground lead to a good ground. Turn ignition On position and manual turn the crankshaft clockwise a full revolution while also checking for the meter to fluctuate between 0.0 and 5.0 volts. If you don't get the proper reading then the sensor is bad.

This should help solve your problem.

Apr 16, 2009 | 2004 Dodge Intrepid

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