While I can't answer either way, how hard would it be to just try it on one vehicle? You should be able to come up with a circuit that just does this stutter-stall thing at the press of a button. Hook it up with a relay, and see if the car complains. Doing it on one car could be considered research :) The other thing to think about is that even if the car does need a trip to the service station, it most likely will anyways after being stolen. That is, unless the theives have copies of the key. Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams On Wed, 23 Jun 2004 12:16:03 +0200, Roland wrote: > The application is retrofitting an alarm system on security vehicles, > mostly toyota sprinters. The current alarm system is problematic, and needs > to be re-designed. > > Part of the design is to "gradually" stall the vehicle by shutting the > supply for a few milliseconds at a time. > > I would like to simply provide relay contacts for them to use on the > injector pump(as suggested), but my concern is if units are installed on > the latest diesel vehicles, that the engine management will shut the > vehicle down if it runs erratically, and it would have to visit the service > centre to re-set. is this a likely scenario? -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body