wickiewicked240z Posted May 21, 2014 Share Posted May 21, 2014 Does anyone have pictures of the all grounding locations for a l28et swap on a 240z. My injectors are not firing. Have fuel pressure, spark. Continuity on all my injector wires and ground wires. Have 12+v on one side on injector plug. Quote Link to comment Share on other sites More sharing options...
NewZed Posted May 21, 2014 Share Posted May 21, 2014 (edited) Screwed up suggestion... better two posts down. http://www.xenons130.com/reference.html Edited May 21, 2014 by NewZed Quote Link to comment Share on other sites More sharing options...
wickiewicked240z Posted May 21, 2014 Author Share Posted May 21, 2014 Yea I been reading the manual with no luck. Would me bolting the ignition coil and bracket on the engine block cause a grounding problem? I have it bolted where the ac backet used to be. Quote Link to comment Share on other sites More sharing options...
NewZed Posted May 21, 2014 Share Posted May 21, 2014 Actually, I screwed up. The injectors are controlled by the ECCS, off of the signal from the CAS. Since you have spark, you're pretty close. You didn't say what engine management system you're using. 81, 82, 83, Z31? Quote Link to comment Share on other sites More sharing options...
wickiewicked240z Posted May 21, 2014 Author Share Posted May 21, 2014 1982 l28et with ecu. I have 3 grounds on injector plug at Ecu. 2wires from plug and one single. There was another ground wire was thicker gauge with one copper connector on each end don't know where that wire goes. Plus I have a custom intake manifold similar to what senza guy is making at the group buy section. I don't have the stock ground mounting locations anymore. Quote Link to comment Share on other sites More sharing options...
ctc Posted May 22, 2014 Share Posted May 22, 2014 (edited) There were ground wires that attach to the factory manifold, make sure those are grounded. Also, the stock ignitor grounds through the bracket. Make sure you have good ground strap on the engine and that the bracket has a good ground. Injectors are grounded through the ecu, should have +12 on the injectors at the ecu plug. Edited May 22, 2014 by ctc Quote Link to comment Share on other sites More sharing options...
wickiewicked240z Posted May 22, 2014 Author Share Posted May 22, 2014 I'm using the stock ground wire from a 280zx from battery(-) to body to starter bolt. Have 2 ground wires coming from ecu that then become splice together then separate bolted to fuel rail mounting bolt. I have another ground wire coming from underneath intake bolt where the heat shield bolts too going to body. Another single ground wire coming from ecu is bolted to side on engine. Am I suppose to ground black wire from ecu to cold start valve since I'm not using it. Quote Link to comment Share on other sites More sharing options...
ctc Posted May 22, 2014 Share Posted May 22, 2014 With all the custom work, your guess is as god as mine for what is and is not connected. Have you ran the ground checks from the 280zx service manual? Quote Link to comment Share on other sites More sharing options...
wickiewicked240z Posted May 22, 2014 Author Share Posted May 22, 2014 I checked continuity on all wires to see if one is broken but everything check out OK. Quote Link to comment Share on other sites More sharing options...
wickiewicked240z Posted May 24, 2014 Author Share Posted May 24, 2014 So I have 4&5th injector firing.. Quote Link to comment Share on other sites More sharing options...
wickiewicked240z Posted May 24, 2014 Author Share Posted May 24, 2014 I got her to start not on all cylinders though. Quote Link to comment Share on other sites More sharing options...
NewZed Posted May 24, 2014 Share Posted May 24, 2014 Will it stay running? Idle? You can swap injector plugs to see if you have a wiring problem or an injector problem. Take the injector plugs off, one at a time, and note which cylinders work and which don't. Then swap a plug from a cylinder that works to one that doesn't and see if the dead cylinder comes to life. It won't fix things but it will tell you a little more about what's going on. And check your plug wires for firing order. 153624 counterclockwise. Quote Link to comment Share on other sites More sharing options...
Casanova702 Posted January 17, 2021 Share Posted January 17, 2021 Did you guys find the problem ? I’m having the same problem I’m running a hot power to the fuel pump with relay and switch . So I’m getting fuel and spark but the injectors are not shooting fuel . I ran my probe to the injectors I’m getting 12v when I start the car drops to 10v then back 12v I’m Guessing I’m getting pulse so I’m a little lost I changed the ecu still the same . Please help !!☹️ Quote Link to comment Share on other sites More sharing options...
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