luggy 13 Posted February 17, 2007 (edited) Ive recently purchased a 405 mi16 3 row ecu, which was in storage for the last two years. It was running fine until last week and now it wont start, Spark plugs, leads, dizzy and rotor cap replaced known good coil and and ignition amp used, checked earthing points for corrosion. Theres fuel getting through but no spark, the old plugs were quite sooted up. It did fire up briefly for about 4 seconds then died then nothing after. What else could it be? could it be the crank sensor? AFM?. How do you reset the ECU? Im starting to run out of ideas any suggestions would be greatly appreciated. Edited February 17, 2007 by luggy Share this post Link to post Share on other sites
welshpug 1,626 Posted February 17, 2007 i'd think crank sensor. to reset the ecu disconnect the battery and leave it for 20-30 minutes. Share this post Link to post Share on other sites
Guest badboyracer3500 Posted February 18, 2007 Ive recently purchased a 405 mi16 3 row ecu, which was in storage for the last two years. It was running fine until last week and now it wont start, Spark plugs, leads, dizzy and rotor cap replaced known good coil and and ignition amp used, checked earthing points for corrosion. Theres fuel getting through but no spark, the old plugs were quite sooted up. It did fire up briefly for about 4 seconds then died then nothing after. What else could it be? could it be the crank sensor? AFM?. How do you reset the ECU? Im starting to run out of ideas any suggestions would be greatly appreciated. I had this prob, yes i had new crank sensor. Not only that timing was out as i also kept burnin out rotors and dizzy caps due to belt tentioner givin up. Gavin. Share this post Link to post Share on other sites
luggy 13 Posted February 24, 2007 Cheers for the responses. Ive reset ECU, changed the CAS for a new one, still no spark. Going to see if the if the fuel pump is working tomorrow and changed the fuel filter and double check the earths as well as the timing. Might it be a dead ECU? how common are ECU failures on 405 MI16? Share this post Link to post Share on other sites
nick 3 Posted February 25, 2007 Check the relays on the loom. I had intermitent starting problems with mine and it was one of the relays. Nick Share this post Link to post Share on other sites
luggy 13 Posted February 25, 2007 Timing checked and OK. Changed the injector relay and fuel pump relay, no fuel being pumped through the system. My main concern is the lack of spark and fuel considering Ive swapped out everything from the ignition side indicates like Im going to need an ECU. Share this post Link to post Share on other sites
luggy 13 Posted March 7, 2007 Bought a fault code reader and I was getting error 21 which is the throttle poteniometer. Anyway Ecu swapped fired up straight away and she runs as sweet as a nut. If the ECU was faulty then why was I getting the error codes. Had a look at the old one which is still sealed with yellow sealant on the screws, no rust or water ingress on the inside which is weird. Is it worth getting it fixed? Thanks for the replies Cheers Baz for the ECU Share this post Link to post Share on other sites
jim21070 2 Posted March 7, 2007 It has got to be worth breaking it open and having a look inside. I seem to recall from another thread you're an electronics engineer Luggy? Chances are it's just a dry joint or one of the power devices has failed. It can't be too serious if you can still drag error codes out of it. I guess these are rare and valuable enough to let one of the specialists out there repair it. Share this post Link to post Share on other sites
luggy 13 Posted March 7, 2007 It has got to be worth breaking it open and having a look inside. I seem to recall from another thread you're an electronics engineer Luggy? Chances are it's just a dry joint or one of the power devices has failed. It can't be too serious if you can still drag error codes out of it. I guess these are rare and valuable enough to let one of the specialists out there repair it. Im a new school IT engineer Jim not old school Could you or anybody else recommend anyone on here to fix it please? Share this post Link to post Share on other sites
Baz 421 Posted March 7, 2007 Cheers Baz for the ECU No problem Hywel, glad it helped!! Share this post Link to post Share on other sites
KRISKARRERA 2 1 Cars Posted March 7, 2007 Do a search on google - there's a few places that will repair ecus, probably charge the earth though. Share this post Link to post Share on other sites
luggy 13 Posted March 19, 2007 Well turned out that there was a "dry joint" got a mate to show me how to sort the problem out and do some soldering. Did a compression test after the engine was warmed up and with the throttle open and no oil, I got 210-190-210-190, which isnt bad considering the cars done a 192k. The engines' now been taken out and put in storage until I can get decent workshop space to recon the engine. One thing I did notice when taking the loom out that there was no connection to the oil pressure gauge only to the oil switch, but it make sense as theres no oil pressure gauge in the 405, just got to remember to transfer it from old loom to new. Share this post Link to post Share on other sites
