To John, I've fixed your ecu and I?ll post it to you today. I tried it first and it started OK (1500rpm slowly dropping to 700rpm) then the idle speed jumped around a bit a few times randomly. To make sure it wasn't my engine being temperamental I plugged my ecu in and it was OK. I suspect it is the voltage comparator being dicky (LM2901N) but as I had to break into the box I replaced all of the chips anyway (but added sockets so you can changethem if required using a screwdriver). Double check your idle speed control valve by removing it from the car. You should have 200 ohms between the centre pin and the outer pins. Briefly (less than a second) connect +12v to the centre pin and 0v to one of the outer pins. This should either completely open the valve or completely close it. Do you have a copy of the Delorean Workshop manual? Let me know how you get on. Regards, Nick. jchapelhow <chapelhow@xxxx> wrote:Nick. Thanks for letting me know, I had not expected such a fast turnaround but if you do manage it this quickly so much the better! John. --- In doc-uk@xxxxxxxxxxxxxxx, Nick Tomlinson <nickandkathryntomlinson@xxxx> wrote: > > To John, just to let you know I have received your ECU and the new chips from Farnell (I've bought enough to repair 4 ECU's). I'll try and get it repaired tonight or tomorrow and send it to you for saturdays post. > Nick. > jchapelhow <chapelhow@xxxx> wrote:To Nick > > I have sent you the ECU today, it is guaranteed to arrive on Friday. > I am happy with your terms, it will be worth it just to prove if the > ECU is at fault! > > I will wait until the car is 'whole' again and then start on the > battery probs. > > > Many thanks > > John Chapelhow > > > --- In doc-uk@xxxxxxxxxxxxxxx, Nick Tomlinson > <nickandkathryntomlinson@xxxx> wrote: > > > > To John, no problem. Check everything that I said in an earlier > post eg checking cabling voltages resistance at the ECU plugs first > as my repair will not result in a working car otherwise. > > Send the ECU to my works address (someone is always here to collect > post). I'll send you an e-mail once I have received the parcel: > > FAO Nick Tomlinson; > > Aston Dane Plc > > Park Mill Way > > Clayton West > > Huddersfield > > HD8 9XJ > > My no. is 07736610787. > > Cost of components is approx £5 and time to repair is about 2-3 > hours (inc testing). I'd test your ECU on my car first, if it works > then there is something else wrong. > > Just send me a cheque for cost of parts plus return postage and > send me 2 tins of the clubs Stainless steel cleaner (or its money > equivalent). Its top stuff. > > If I am not going on site this week then you may get it back for > the end of this week. > > Best way to test drain from battery is to disconnect the earth > cable from the battery and connect an ammeter between the Earth cable > and the battery post and note the current drain. Disconnect each fuse > from the fusebox in turn to isolate which circuit causes the drain. > If you find the drain then check the components on that circuit. If > it turns out to be the charging circuit then disconnect the leads > from the alternator as you may have a 'leaky' diode in the rectifier > that causes drain down. The safety lights on the doors may still be > on when the doors are closed. You can disable these by disconnecting > them from the switches near the doors on the main car body just > underneath the dash. > > Hope this helps. > > Nick. > > jchapelhow <chapelhow@xxxx> wrote:Nick > > > > My garage have tried most of the 'quick fixes' for my idle > problems, > > it looks like the ECU is to blame. > > > > I would like to take you up on your offer of repair services, if > you > > could e-mail me off-list with your address and a price for the > > component/delivery I will send you a cheque for the bits. If you > > could also advise on your charge for the repair and timescales that > > would be great. > > > > As an aside could it be that this circuit is also responsible for > the > > car's battery drain? > > > > > > John Chapelhow > > > > DOC 19 : 'Boeing' #0737 > > > > > > Yahoo! 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