missfire detection by crank sensor

Ask any questions relating to the PicoScope hardware or kit contents here.
If you have any questions prior to purchasing the kit post them here.
Post Reply
autosparky

missfire detection by crank sensor

Post by autosparky »

think this might work? has anyone detected missfires by the time diferences between firing events? or on a crank angle sensor? in theory a dead cylinder should rotate the flywheel slightly slower due to lack of power stroke and slower again on the next compression.

User avatar
ricardo
OneWave
OneWave
Posts: 25
Joined: Wed May 07, 2003 9:43 am

Post by ricardo »

Yes in theory this is possible, this is how the PCM or ECU's OBD system detects misfire. The trick is how to process/analyse the signal captured by the scope.

Here is an interesting article you might find useful,

http://www.findarticles.com/p/articles/ ... i_n8891565

Another method used to detect misfire is analysis of the oxygen or lambda sensor. A company that specialises in this is Thomson Automotive Labs in the US. This is their website,

www.acemisfire.com

Best regards,

Ric
Ricardo Paloschi
Sales Engineer
Forum Moderator

anttdogg73

crank angle sensor

Post by anttdogg73 »

what is a crank angle sensor on a1.8l dohc acura integra engine its on a 96-01.

User avatar
ricardo
OneWave
OneWave
Posts: 25
Joined: Wed May 07, 2003 9:43 am

Post by ricardo »

Hi,

The crank angle sensor tells the ECU the position of the crankshaft so it can work out when to fire the plugs and injectors. Its usually either an inductive or hall effect sensor located on the flywheel or on a pulley at the other end of the crankshaft.

Best regards,

Ric
Ricardo Paloschi
Sales Engineer
Forum Moderator

Post Reply