VW Golf 1.4 S 16v Camshaft Sensor Problem

[Kevon29]

VW Golf 1.4S 16v Camshaft Sensor Problem
Hi

My 98 Mark 4 Golf 1.4 S 16v is showing a diganostics problem Camshaft Position Sensor Earth to Ground, also there is lack of power at low revs and a dip in power at 2000 - 2300 rpm, above 2500 rpm it goes like the clappers, can anyone help me to resolve this problem.

I have changed the ignition coil and the camshaft sensor.

[kenney]

Hi Since you have replaced the sensor and with the reading you are getting i would imagine there is something wrong with the wiring.To check the sensor properly it needs to be scoped

[Kevon29]

Hi

What do you mean Scoped?

[kenney]

electronic equipment that provides visual images of varying electrical quantities

[Kevon29]

How do you do this and can I get the wiring checked?. There are 3 wires going to the Sensor and then they join into the loom.

[kenney]

Hi You have to ohm the wires give me your engine code and i will tell you were and how to check them. Most modern workshops have equipment to scope components,however i think you should consentrate on the wires.

[Kevon29]

Is there any simple test I can do, when I disconect the Sensor and test driver the car there is no difference at all in fact I think its better.

[pipvwcars]

If the fault is electrical, the two common places to look are the earth connections, one under the battery (there should be several connections) the other is under the scuttle panel in front of the engine e.c.u

however the camshaft sensor could be detecting that the camshaft and crankshaft aren't in perfect timing with each other. i.e the cambelt is a bit slack.

how long ago was it changed? or has it (i say "it" but it actually has two)

i know im swearing when i say vauxhall, but they suffer with camshaft sensor faults, normally being down to the cambelt.

[Kevon29]

That's very interesting I bought the car in June last year and I was told the Timing belt was replaced. I have been told that if you don't replace the complete Timing belt kit (belt & tensioners) this could throw up this problem.

[kenney]

No signal
- Fault in power supply or earth connection for -G40
- Engine no longer runs up to cut-off speed (engine speed governed to approx. 5100 rpm)
-
Implausible signal
- Faulty signal input in engine control unit (control unit defective)
- Engine starts reluctantly or not at all when cold (cold start problems)

- Open circuit or short to positive or earth in signal wire between -G40 and engine control unit
- Engine starts reluctantly or not at all when warm (hot start problems)
- Rectify open circuit or short using current flow diagram
Possible causes of fault
Possible effects
Fault remedy

Hall sender -G40
(cont.)

- -G40 defective
- Loss of power
- Toothed belt has jumped tooth (signal does not occur at point expected)
- - Check engine valve timing:
-
- Rotor trim defective (bent, cracked)