jkube Posted November 6, 2003 Share Posted November 6, 2003 Here's a few pics of the Fuel injection install. Megasquirt will handle the fuel and a 280zx electronic distributor will handle spark. I've got a few more things to install.. fuel pump and regulator (when they arrive) air intake filter and a couple of sensor connectors. Since the pics were taken the open ports on the intake have been blocked off, and the relay board has been fully wired. I've been working on an adapter to install a TPS from a late model Chev. That will give a linear voltage increase rather than the Nissan's "switch" type activation. Wire loom and MAP sensor tubing location. Also "D" shape fuel rail and location of pressure gage Air intake pic. Air intake sensor is located in the first port in the rubber elbow. A cone type filter still needs to be installed Relay board location. The connector is the DB37 that runs to the main ECU in the passenger compartment Exhaust gas sensor location in the header. There is another one further downstream where the collector merges into one. I'll try that postion later to see if it makes any difference Quote Link to comment Share on other sites More sharing options...
Xander Posted November 6, 2003 Share Posted November 6, 2003 I hope The other O2 sensor is a heated one. I used one in the same location as in the picture (6into1 manifold though) And it didn't get hot enough to operate. Now I have a heated one in there (three wire) wich is hooked up to the fuel pump wire. It only starts heating when the engine is running. I also reinstalled the auxilary air valve. This worked great for extra air when starting cold. Just wire it into the fuel pump line aswell. then let the tuning begin. xander Quote Link to comment Share on other sites More sharing options...
Bernardd Posted November 6, 2003 Share Posted November 6, 2003 I've been working on an adapter to install a TPS from a late model Chev. That will give a linear voltage increase rather than the Nissan's "switch" type activation. 89+ maxima or 240sx tps bolts on has both the switch and the resistor type tps and is a direct bolt-on. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted November 6, 2003 Share Posted November 6, 2003 240sx tps bolts on has both the switch and the resistor type tps and is a direct bolt-on That is what I am using. BTW install looks good, I still think MSnS is the best bang for the buck fuel/spark computer available for us guys without a big budget. Quote Link to comment Share on other sites More sharing options...
Guest Want aZ Posted November 6, 2003 Share Posted November 6, 2003 Moby, Have they got MSnS out yet? I thought it was die out around this time? Just wondering Damon Quote Link to comment Share on other sites More sharing options...
Forrest Posted November 6, 2003 Share Posted November 6, 2003 Thanks for the pics. I am just a few days away from this step (waiting for injector connectors to use on a new harness.) Quote Link to comment Share on other sites More sharing options...
mobythevan Posted November 6, 2003 Share Posted November 6, 2003 Have they got MSnS out yet? I thought it was die out around this time? Just wondering Just load version 3.0 MegaSquirtnSpark code on a MegaSquirt and have fun. Unless your thinking of UltraMegaSquirt which has wideband and other stuff, that is not out yet. Quote Link to comment Share on other sites More sharing options...
Guest Boyd Posted November 7, 2003 Share Posted November 7, 2003 I have yet to get MSnS working. I am also starting to get a 'dirty' tach signal below 1,000 rpms, so idle quality is terrible. Gonna put some more time in trying to get the 7pin HEI to work with the stock '77 dizzy. Quote Link to comment Share on other sites More sharing options...
jkube Posted December 5, 2003 Author Share Posted December 5, 2003 Boyd, Did you get your MS to recieve a clean signal from the coil? I've been having having a #@#%^ of time trying to get the car to do more than judt idle. Seems just as I step on the throttle the MS signal resets. I'm going to either put together an HEI setup or go with Perry Harringtons setup. Send me an email on your progress Quote Link to comment Share on other sites More sharing options...
Xander Posted December 5, 2003 Share Posted December 5, 2003 Boyd, I had a problem with a jumping tach signal around and below 1000 rpm. It would somethimes jump to more than 10.000 rpm for an instand. After installing the "Dave" capacitor modification it all went away. I now run 700 rpm at idle no problem. jkube, I read somewhere in the megasquirt manual about this problem. Something about grounding the trigger signal externaly instead of on the board. I'm not sure. But I am sure the problem was talked about. good luck to both of you, Xander Quote Link to comment Share on other sites More sharing options...
jkube Posted December 5, 2003 Author Share Posted December 5, 2003 Yes thanks xander. I tried this trick as well and it made no diference to the problem. I was really surprised and dissapointed. I'm going to try the HEI setup next and if this doesnt work I'll move on to Perry Harrington's new isolation circuit setup. Quote Link to comment Share on other sites More sharing options...
datsunlover Posted December 6, 2003 Share Posted December 6, 2003 Hey guys just curious.. what is this HEI setup you speak of? I am trying to find info on it, but guess Im not looking inthe right place... is this a 'stand alone' system or just something that works well with the MS FI system? Quote Link to comment Share on other sites More sharing options...
Zsane Posted December 7, 2003 Share Posted December 7, 2003 Check here. http://www.bgsoflex.com/megasquirt.html Quote Link to comment Share on other sites More sharing options...
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