johnpbransfield Posted January 30, 2020 Share Posted January 30, 2020 looks like I need to check the TPS settings on my Sigma 140 SS. Does anyone know what settings I should be looking at , are they same as the 150 on TB's?Thanks in advance! Link to comment Share on other sites More sharing options...
Tom_Arundel Posted January 30, 2020 Share Posted January 30, 2020 why do you need to check it? Link to comment Share on other sites More sharing options...
johnpbransfield Posted January 31, 2020 Author Share Posted January 31, 2020 Developed tick over / running problems, sorted with altering the throttle stop but need to check why it has happened. Link to comment Share on other sites More sharing options...
ChrisC Posted January 31, 2020 Share Posted January 31, 2020 The 140 uses MAP (manifold absolute pressure) to control the ignition and fueling, and the TPS is a guide to inform the decision. This didn't work on the 150, although it was tried, hence the switch to TPS lead strategy. I suspect the TPS position won't be the same as the 150. Obviously the best thing to do is get it on Easymap and see whats going on, but short of that a few things you might like to try.If you don't have a battery isolator try disconnecting the battery for 10 seconds and reconnecting it, the ECU is always powered so this is just resetting any learned behavior, you need to do that each time an adjustment (like the throttle stop) is made. Manifold pressure leak, have you got a split in the small rubber air hose to the MAP sensor, or any of the bungs on the plastic plenum. Finally lambda sensor problem, but the symptoms of this are well documented. Link to comment Share on other sites More sharing options...
johnpbransfield Posted January 31, 2020 Author Share Posted January 31, 2020 Thanks for the input Chris.Mine was a 150 0n TB's but i had it changed to a 140SS. It does not use a MAP! I took it to Track and Road to get it sorted and Steve G said it was not connected anyway and to leave it off if i was not intending driving up the Alps! So there is no rubber hose. When Steve G remapped the locked ECU he took out the need to disconnect the battery. Car has new plugs and new Lambda sensor. The car was fine until I took it on the trailer to have the cambelt done. But getting it off the trailer it would not hold tickover or able to blip the throttle so something must have moved. It works now due to altering the idle screw but that is a remedy and not a cure. hence looking at the TPS. Do you know where i can getting what the TPS parameters are for the 140SS.....i was hoping they were the same as the 150 which arte well documented.Thanks in advance Link to comment Share on other sites More sharing options...
ChrisC Posted January 31, 2020 Share Posted January 31, 2020 Ok, so important information there. Even the 150 had a MAP sensor that's open to the air, it still affects the map, just no to the same extent, and you are right it's for driving to the Alps :-), but unplug it and the car will run like a pig (on a stock 150). All bets are off if Steve G has worked his magic on your car, my information is based on stock setups. Given the above information, you need to restore your TPS to the value it was when Steve worked on it. That's the problem, and reason CC don't use TPS based maps, the map becomes dependent on the TPS value, and these are not all consistent. The ECU isn't capable to learning, so setting up becomes the important part.The resetting of the ECU is just something you should do every time any change is made, be that mechanical or electrical, so the ECU when starting has the base values, this can only be done by pulling to power (easy with a battery isolator).BUT There is one thing that springs to mind, was it raining on the way to the cambelt change? I have heard from the specialist that did my 150 conversion that the open to the air MAP sensor can suffer from direct water strikes. He recommended a small hose to make a U bend to prevent this, still open to the air, just not upwards. Since it's such a small expense I have done this to all the 150 club members that have come to me for a tune up. Never seen it myself so I only have that on hear say. Link to comment Share on other sites More sharing options...
Tom_Arundel Posted January 31, 2020 Share Posted January 31, 2020 where do you live John?Have you got the Easymap gear? Link to comment Share on other sites More sharing options...
johnpbransfield Posted January 31, 2020 Author Share Posted January 31, 2020 Hi Chris,Many thanks for the information.No it wasnt raining when i took took it for ths cambelt change but i did hose all the salt off it when i got there! From what Steve G said the MAP has no power to it, it was the first thing he mentioned when it was remapped two years ago and has been excellent since with the Premier Power ultralight flywheel..I shall get in touch with Steve and see if he has the TPS settings on my file for the ECU, I shall put a tube over the MAP opening too and also disconnect the battery...just in case! Link to comment Share on other sites More sharing options...
johnpbransfield Posted January 31, 2020 Author Share Posted January 31, 2020 Hi Tom, Based in Haworth, West Yorkshire.I have downloaded "Easimap" but will have to buy the cable from SBD......then i shall have to enroll at University on a computer course to try and understand it! Link to comment Share on other sites More sharing options...
ChrisC Posted January 31, 2020 Share Posted January 31, 2020 My guess is Steve wont have the voltage but the "throttle site" and how he sets it. Easymap shows a lot of information, the secret is to concentrate on whats relevant and add more readouts as you go. So in this example, throttle pot voltage and throttle site may be a good starting. Good luck Link to comment Share on other sites More sharing options...
Domus Posted February 1, 2020 Share Posted February 1, 2020 John you can borrow mine if you like, LADS on Wednesday.Dr John can talk you through it. He knows more than I do, his was also a 140 fettled by Steve G. Link to comment Share on other sites More sharing options...
johnpbransfield Posted February 1, 2020 Author Share Posted February 1, 2020 Thanks Peter PM sent Link to comment Share on other sites More sharing options...
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