LeeT Posted December 14, 2006 Share Posted December 14, 2006 The mapecu will not give any o2 reading without connecting up the AEM wideband. Not even the stock o2 sensor output is displayed. Where did you get the basemap? and what injectors are you running? Quote Link to comment Share on other sites More sharing options...
Marty Posted December 14, 2006 Author Share Posted December 14, 2006 Ok but like Ricky says, you'll kill a wideband sensor if it's left in the exhaust whilst not connected to power. The mapecu will not give any o2 reading without connecting up the AEM wideband. Not even the stock o2 sensor output is displayed. Where did you get the basemap? and what injectors are you running? Ive not run it for long, just to check its working i'll connect the wideband up then, silly of me not realising it was needed Hopefully that should do the trick. Lee--- im just using a basemap that came with the software for the 550 single supra engine, running the standard 550's until after xmas Quote Link to comment Share on other sites More sharing options...
Marty Posted December 14, 2006 Author Share Posted December 14, 2006 Ahh its all coming to light;) first off don't believe the read out for the std lambda as its no very accurate, second it is only meant to tell the ECU if the AFR is varying from stoic 14.7 AFR also its signal should not really have any adverse affect on the ECU as its in effect just a switch, is the ECU stand alone of piggyback? you need to get your AEM wired up and running, also you may risk killing the wide band sensor if you have not got it powered up with its heater on:blink: The ecu is a piggyback, gets rid of the maf senosor on the uk spec and also controls the fueling etc. Hopefully the senosr isnt dead then, ive only had it running for a total of about 5-10mins so far. I think the best bet is to connect up my wideband and go from there Quote Link to comment Share on other sites More sharing options...
supra matt Posted December 14, 2006 Share Posted December 14, 2006 mate your wide band looks to close it should be about 2 ft from the turbo as they dont like to get that hot .! Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 14, 2006 Share Posted December 14, 2006 The ecu is a piggyback, gets rid of the maf senosor on the uk spec and also controls the fueling etc. Hopefully the senosr isnt dead then, ive only had it running for a total of about 5-10mins so far. I think the best bet is to connect up my wideband and go from there Does it have its own dedicated lambda input? the std ECU will normally deal with the lambda feedback, i suspect there is something off in the Mapecu base map, as said i would be inclined to weld another boss in the 1st decat pipe for the wide band. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 14, 2006 Share Posted December 14, 2006 If it's running so rich as to create a misfire it will read lean... YOU MUSTN'T RUN it so rich as to smoke, it will bore wash in no time and you'll be needing a rebore and new pistons and rings. Have it trailered to the mapper and get it sorted before you knacker it. IMHO. Quote Link to comment Share on other sites More sharing options...
Alex Posted December 14, 2006 Share Posted December 14, 2006 If I was to guess I'd say the MAP ECU isn't doing anything and the 550cc injectors are being treated as 440's by the stock ECU and so you're overfueling... It's might not be doing anything because of a wiring fault or a problem with it's map. Quote Link to comment Share on other sites More sharing options...
foodfreak Posted December 14, 2006 Share Posted December 14, 2006 it's a uk car with 550's, so the stock ecu should handle the idle as it's closed loop. BUT also at cold start the stock ecu puts in a hell of a lot more fuel but the map ecu 'could' be trying to add more.( depends on the map) until the wideband is correctly wired in, Martin won't be able to find out what is going on. The Map ecu doesn't adjust by af/r's like the emanage, only by what you tell it to do in the map. so you need to log runs & adjust where necessary.The Wideband needs to be linked to the Map ecu so you can read what's going on with the software and for logging purposes. I've run mine for the last 2 years.....it's not bad once you get your head around it:) Quote Link to comment Share on other sites More sharing options...
Marty Posted December 20, 2006 Author Share Posted December 20, 2006 an update. had an email of Marty, he pointed out something simple, that id missed Thanks Marty My map ecu wasnt seeing a vaccum when the car was ticking over, it was sitting at 0, so i had either a tangle in my vaccum hose going to the map ecu, or it had come off in the engine bay. Sure enough, it had come off . Put it back on and its ticking over 100% better afr's are still a bit high though it was sitting at 15, until i clicked a screen shot going to plumb the wideband in this afternoon and see if that brings it down to perfect Quote Link to comment Share on other sites More sharing options...
Marty Posted December 20, 2006 Author Share Posted December 20, 2006 now its warming up... Quote Link to comment Share on other sites More sharing options...
SupraHuman Posted December 20, 2006 Share Posted December 20, 2006 That looks better,you can reset the TPS with the map-ecu as I did with mine.That sorted the idle problem out.once you have your own wideband sorted out it is a lot less hassle to adjust.Good luck. Quote Link to comment Share on other sites More sharing options...
bondango Posted December 20, 2006 Share Posted December 20, 2006 an update. had an email of Marty, he pointed out something simple, that id missed Thanks Marty My map ecu wasnt seeing a vaccum when the car was ticking over, it was sitting at 0, so i had either a tangle in my vaccum hose going to the map ecu, or it had come off in the engine bay. Sure enough, it had come off . Put it back on and its ticking over 100% better afr's are still a bit high though it was sitting at 15, until i clicked a screen shot going to plumb the wideband in this afternoon and see if that brings it down to perfect No probs Martin, sometimes its the simple things :-) Marty Quote Link to comment Share on other sites More sharing options...
Marty Posted December 21, 2006 Author Share Posted December 21, 2006 i know, i never even thought of looking at that, was thinking the worst.... Thanks again mate ive just got to get the map right now, need to get myself a laptop and get the bugger on the road for some mapping wideband is going in 1st though, wheres the best way to run the cable in to the engine bay? it has a fairly chunky plug on the end so i cant squeeze it through any small gaps.. Quote Link to comment Share on other sites More sharing options...
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