No RPM
No RPM
I have a kent xflow which i race. The crank sensor wheel smashed and wiped out the sensor with it. Replaced the wheel and sensor and i now have no rpm when cranking on laptop. Bought another sensor just in case i had a faulty one and still no rpm. sensor wheel has 1 tooth missing. cranked with booster on battery as well incase voltage was a problem. Ran test on diagnosic to coil pack and it sparks. The loom didnt get touched when the sensor wheel broke. Anyone have any ideas? Also have moved sensor from half a mm to 1 and a half. scope test reads the teeth but not that great. green line for missing tooth isnt consistent in test.
Re: No RPM
sounds like you need to take it closer, try 1mm
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- Posts: 3578
- Joined: Tue Aug 02, 2011 12:08 pm
- ECU Model: No ECU
- Location: Norn Iron
Re: No RPM
You sure the wiring is ok ? Polarity ok ? Was the sensor the exact same one you were using ?
Re: No RPM
air gap between wheel and sensor could be too big or the replacement sensor is not the same spec as the one that was on the car originally.
Re: No RPM
The sensor is from the same manufacturer the air gap has been set to half a mm to one and a half. It's a standard sensor the polarity wouldn't have changed. The loom is undamaged. Could the ecu be the problem? Just on the sensor side of things.
Re: No RPM
1.5mm may be way too much for a small diameter tone ring to get decent signal in cranking conditions. I've usually ended up to 0.4-0.8mm with 130mm diameter rings.
Sometimes things are soooo simple. If it works, don't touch it
Sometimes things are soooo simple. If it works, don't touch it
Re: No RPM
I've tried it close to wheel. I might just push the bracket until it's skimming it. Seriously annoying me as Engine was fine before. I've had at at half a mm. I've got a spare new sensor so I'll get it touching
Re: No RPM
Is new ring similar than the one which broke ? Material.. thickness... teeth width. What sensor ?
Re: No RPM
Same wheel. Same sensor. Can't remember the name of sensor. It's off of a fiat tempra turbo. Part number Short code:
Sen8d
Long code:
064820083010
Sen8d
Long code:
064820083010
- ottotuning
- Posts: 2
- Joined: Sat Oct 01, 2011 10:19 am
- ECU Model: S80 Pro
- Firmware Version: 44
Re: No RPM
That's the same sensor used on 2wd sierra cosworth's
0.5mm to a 1mm should be fine.
Have you tried changing the wires round any way just to see what happens.
Don't forget to make sure the trigger wheel positon is the same as before.
0.5mm to a 1mm should be fine.
Have you tried changing the wires round any way just to see what happens.
Don't forget to make sure the trigger wheel positon is the same as before.