_ethrty-Andy_ 2122 Report post Posted December 12, 2009 The m20 TPS is just a switch, which tells the ECU, idle, partial load, or wot. It is not varible like on newer engines such as m50's and newer. M20's with an automatic transmission and selectable sport modes had a slightly different TPS, which included the normal TPS for the engine ECU and the variable one for the transmission ECU. You can easily test your TPS, by checking for contiunity with a multi meter, im not sure of the pin connections, you will have to find that yourself, or trial and error. But with the throttle closed, 2 pins should be connected, with it partially open, none should be connected, with it at wot 2 should be connected (different to the ones when it was closed). Sometimes they can fill up with oil and not make proper electrical connections inside, or they become out of adjustment and so it either reads partial throttle or wot (it wont sense idle). In my experiance this will make the engine run extrememly rich Thanks very much! ill let you know how i get on with that Quote Share this post Link to post Share on other sites
