Poundz9oh9 Posted August 14, 2013 Share Posted August 14, 2013 Title says it all! The one on my car failed (77 280z) and NONE of the parts sources I've checked have one! Does anybody have one that's good or can tell me where I can find one new? Car left me stranded, had to tow it to a shop and now I just need this to get the car outta there! Quote Link to comment Share on other sites More sharing options...
dexter72 Posted August 14, 2013 Share Posted August 14, 2013 If its an emergency, just go to the junk yards in your town and grab a couple. Should be some Z's in the yards in Texas. Quote Link to comment Share on other sites More sharing options...
Poundz9oh9 Posted August 14, 2013 Author Share Posted August 14, 2013 I have a lead on one, I'll have to check in the AM. It's the only 280z on a yard here in town ... never thought finding one would be this hard to find. Quote Link to comment Share on other sites More sharing options...
NewZed Posted August 14, 2013 Share Posted August 14, 2013 They're not very complicated, just some throttle-actuated contact points. Have you taken the cover off to see what's happening, and how do you know it failed? Quote Link to comment Share on other sites More sharing options...
z240 Posted August 14, 2013 Share Posted August 14, 2013 The TPS is a simple switch so the ecu knows if you are off idle or at full throttle. At idle, pins 2 and 18 are connected, then just off idle, they disconnect. At 30 degree open throttle 3 and 18 connect. So, if desparate, cut the wire to the plug on the TPS, leaving 3 inches. strip the wire ends. Pull the plug and read the numbers next to the plug terminals to get which is which. Connect the bare ends of 2 and 18, start the car. Disconnect 2 and 18 and drive away. Drive gently all teh way home, as you won't get full enrichment. Replace TPS eventually, re-splice 3 lousy wires. Quote Link to comment Share on other sites More sharing options...
tyler031734 Posted August 14, 2013 Share Posted August 14, 2013 Are the 77 tps really so complicated? On my 280zx's turbo and non. They just had two contacts. Only used for idle and fuel cut off in deceleration. (When totally of throttle) I ran for a long time without one. (Went to a 60mm) finally went to a brake light switch under the dash instead... I know weird. But it was a clean engine bay. Quote Link to comment Share on other sites More sharing options...
Poundz9oh9 Posted August 14, 2013 Author Share Posted August 14, 2013 I hadn't looked at it, but the car will start and idle until about 1100rpms. Anything past that it would fall on it's face. I limped it to the shop that I was taking the car to anyway (getting exhaust welded up) and just gave them that issue too. The tech tested the part IAW the FSM and identified that it fails at anything above idle. Normally I'd play with it a bit, but I'm out of time, this car is going into DD status next week. I'm HOPING that the one 280Z listed at the salvage yard still has it on it (and that it's good) to get me back up and running Quote Link to comment Share on other sites More sharing options...
z240 Posted August 15, 2013 Share Posted August 15, 2013 (edited) it starts, pull the connector off of it once its started. Same as "off idle open 2/18" Edited August 15, 2013 by z240 Quote Link to comment Share on other sites More sharing options...
dexter72 Posted August 15, 2013 Share Posted August 15, 2013 Check for 70's 810's, 80's maximas and 80's zx's the tps's should be the same. They should all be the on off type. The later model nissans have a different type of switch. Quote Link to comment Share on other sites More sharing options...
Poundz9oh9 Posted August 15, 2013 Author Share Posted August 15, 2013 I appreciate the help guys, will hit the yard in the morning to see what I can find. I really can't believe there's no new ones out there! Quote Link to comment Share on other sites More sharing options...
zentech Posted August 15, 2013 Share Posted August 15, 2013 I appreciate the help guys, will hit the yard in the morning to see what I can find. I really can't believe there's no new ones out there! If you don't find one i have several as spares for your year car. Good luck. Quote Link to comment Share on other sites More sharing options...
Poundz9oh9 Posted August 15, 2013 Author Share Posted August 15, 2013 Thanks much zentech, I'll know today off I'll need it! Quote Link to comment Share on other sites More sharing options...
mattb3562 Posted August 16, 2013 Share Posted August 16, 2013 I've got one that was on a great running and driving 76. Idk if its the same or not....but $25 shipped Quote Link to comment Share on other sites More sharing options...
tyler031734 Posted August 16, 2013 Share Posted August 16, 2013 I hadn't looked at it, but the car will start and idle until about 1100rpms. Anything past that it would fall on it's face. The tech tested the part IAW the FSM and identified that it fails at anything above idle. It sounds like its working as it should. closed circuit at idle and open (disconnected) everywhere else. These TPS do not work like ones of later years people are used to. Usually its a wiring harness issue making the ECU think the TPS is still sending a "idle" signal and it will cut fuel over 2500rpm. Test the wiring harness at the ECU side for an open signal. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.