DAT240Z Posted January 2, 2007 Share Posted January 2, 2007 I just got my car running but the problem now is it runs for only 20- 30 secs. and dies, I have been playing with the after start enrichments setting but can get the car to stay ildleing. I have been reading the manual about calibrating the TPS, but when I input the reading megatune tells me the " value looks funny" I have try to adjust the TPS by moving it back and forward, but any reading I input in the calibration box tells me it's looks funny. This how I'm calibrating the TPS. 1 tools 2 click on get current 3 click on cancel 4 click on tools, clibrate TPS 5 ENTER the value plus add 2 ( so if I got lets say 34, when I ckeck I add 2 and enter 36) Is the way to set the TPS calibration? I not sure it this has anything to do with the car not running for more than 30,seconds or not. Thanks Quote Link to comment Share on other sites More sharing options...
DAT240Z Posted January 2, 2007 Author Share Posted January 2, 2007 I just pull the wire off the coil, I'm loosing spark for while, when I let the car sat for a while it will crank up and run then dies, because it has lost spark. Anyone has any Ideas. Quote Link to comment Share on other sites More sharing options...
z-ya Posted January 2, 2007 Share Posted January 2, 2007 If MT doesn't like your TPS settings, then you have to figure that out first. What typically happens is the VREF and GND are wired wrong (outside pins on TPS connector. Try swapping the VREF and GND signals on the TPS. If they are wired wrong, the TPS calibration will return a lower value for WOT vs. idle. MT wil report that something is funny. Quote Link to comment Share on other sites More sharing options...
DAT240Z Posted January 2, 2007 Author Share Posted January 2, 2007 Hi Pete, Would that cause me to loose spark? I'm running the 024s13 code MS 1 with the 3.0 board, and MS is fireing my spark. Quote Link to comment Share on other sites More sharing options...
DAT240Z Posted January 2, 2007 Author Share Posted January 2, 2007 Does anyone knows what code I need to just run fuel only, or how I set up ms. to just run fuel. Quote Link to comment Share on other sites More sharing options...
z-ya Posted January 2, 2007 Share Posted January 2, 2007 Do you have the spark inverted in the spark settings menu? Are you using the VB921 to fire the coil? If you the spark output must be inverted, or the VB921 will overheat. can you give us more information about your setup? Pete Quote Link to comment Share on other sites More sharing options...
DAT240Z Posted January 2, 2007 Author Share Posted January 2, 2007 yes I have the spark inverted. my set up 76 260z engine N42 HEAD N42 BLOCK- BORE 50 OVER DISH PISTON STOCK T3 TURBO 83 - TURBO DISSY SUPRA INTERCOOLE 370 CC INJECTORS WALBRO FUEL PUMP MS 1 MS& SPARK EXTRA 3.O BOARD- WITH COIL DRIVER Quote Link to comment Share on other sites More sharing options...
trwebb26 Posted January 4, 2007 Share Posted January 4, 2007 I'm not familiar with your TPS setting proceedure. I just "get current" when the throttle is closed... put my foot on the go-pedal and hold it here - and then "get current" for the open throttle position. The way to check your throttle position is to turn on that guage in the megatune window. It ought to read 0% with your foot off of the gas and 100% with it floored. Once you get this right - we'll talk more about your ignition problem. Quote Link to comment Share on other sites More sharing options...
DAT240Z Posted January 4, 2007 Author Share Posted January 4, 2007 I just cecked the throttle position and it reads 0 close and 100% when I push the peddle to the floor. Car still does not have spark. Quote Link to comment Share on other sites More sharing options...
z-ya Posted January 4, 2007 Share Posted January 4, 2007 No spark at all? How do you have the coil wired? What coil are you using? Sounds to me like your VB921 coil driver is shot. Did you run it at all with the spark output not inverted? It will overheat and burn up in a matter of minutes if you did. What is your dwell set to? It should be in the 2.5 to 3.0mS range for a stock ZX coil. Did you run it with a large dwell setting for a period of time. This could also damage the VB921. Quote Link to comment Share on other sites More sharing options...
DAT240Z Posted January 4, 2007 Author Share Posted January 4, 2007 The car have intermiting spark, it will start run for a litttle while no more than a min. if that long and dies. When I pull the coil wire and hold it body of the car to ckeck for spark theres none. my dewell setting is 4.0, 2.8- running and .1 My coils is stock, I have the (+) hooked up to the (+) side of the fuel and the (-) to the relay board pin # 5 I just went o try and start it again nothing it does not have any spark. Quote Link to comment Share on other sites More sharing options...
z-ya Posted January 4, 2007 Share Posted January 4, 2007 Take the cover off the MS, and put your finger on the VB921. Does it get hot? Quote Link to comment Share on other sites More sharing options...
DAT240Z Posted January 4, 2007 Author Share Posted January 4, 2007 Pete, I just felt the coil driver and it's not hot. the car started for a few seconds and than die. I left the ignition switch for 4 mins. bofore i felt the coil driver. Quote Link to comment Share on other sites More sharing options...
z-ya Posted January 5, 2007 Share Posted January 5, 2007 The VB921 will only get warm if it is firing the coil. So when it dies, if you crank it, you get no spark? Or does it then start and run for a few seconds? Quote Link to comment Share on other sites More sharing options...
DAT240Z Posted January 5, 2007 Author Share Posted January 5, 2007 The VB921 will only get warm if it is firing the coil. So when it dies, if you crank it, you get no spark? Or does it then start and run for a few seconds? Yes when it dies I pull the coil wire and check and there no spark, Other times it will not run because there no spark, after it sit for a while it might run but soon dies again, when it loose spark Quote Link to comment Share on other sites More sharing options...
z-ya Posted January 5, 2007 Share Posted January 5, 2007 I have a feeling that something is not right in how the VB921 is connected to the coil. Check your wiring again. Let the car sit, then have someone else start while you put your finger on the VB921. If something is shorted, it can heat up quickly, causing it to dies after a few seconds. That is where I would look. Quote Link to comment Share on other sites More sharing options...
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