tugalo Posted October 23, 2014 Share Posted October 23, 2014 Hi guys, 88 MJ, 4.0, Ba-10, C101 bypassed I've been having trouble with the truck occassionaly going to 3000 rpm and staying there, usually i have to unplug and replug the IAC to correct it. I decided to try a new TPS to see if it made any difference. In the course of doing Cruiser's TPS adjust, i found I only have 4.32V on the 5V supply line. I removed the computer to check continuity on the 5V supply line at pin C15, and found i only had 1 ohm of resistance. I noticed that the line to the TPS was light blue at the computer, but was blue with a tracer at the TPS so i'm thinking there is a splice somewhere in the line that is intermittent. My questions: Is the low supply voltage a cause for concern? Does anyone know a better way or place to remount the computer? Link to comment Share on other sites More sharing options...
tugalo Posted October 23, 2014 Author Share Posted October 23, 2014 Had suspicions about my meter, so i went out this morning and tried again. Turns out my meter was joshing me....all is well now. I had 4.82V on the supply line. I set the output to .79v which is a little lower than 17% but my idle has smoothed out at around 750 rpm, never been that low..... Which brings up another question, instead of setting the voltage at 17% of supply, could you not just start the engine and rotate the TPS to get the desired idle RPM? Link to comment Share on other sites More sharing options...
ftpiercecracker1 Posted October 24, 2014 Share Posted October 24, 2014 Hi guys, 88 MJ, 4.0, Ba-10, C101 bypassed I've been having trouble with the truck occassionaly going to 3000 rpm and staying there, usually i have to unplug and replug the IAC to correct it. I decided to try a new TPS to see if it made any difference. In the course of doing Cruiser's TPS adjust, i found I only have 4.32V on the 5V supply line. I removed the computer to check continuity on the 5V supply line at pin C15, and found i only had 1 ohm of resistance. I noticed that the line to the TPS was light blue at the computer, but was blue with a tracer at the TPS so i'm thinking there is a splice somewhere in the line that is intermittent. My questions: Is the low supply voltage a cause for concern? Does anyone know a better way or place to remount the computer? Good observation/thinking on your part. :thumbsup: It will be a bish to track down, but that is probably going to be your best bet. Our wiring looms are notorious for having piss poor splices from the factory. :shake: Link to comment Share on other sites More sharing options...
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