WAGON JON

Yeah I thought of that too. I may rethink the piping as you have suggested.

My MAF is set up to run as factory as possible. It has a Stillen velocity stack adapter and a K&N filter over that. The Velocity stack adapter is bolted straight to the MAF. Several inches of factory tubing out of the MAF to the throttle body. 34 the knock sensor seems I replaced that. Maybe not. Easy fix tho.

Ok, now I have 12, 22, 34 12: Mass air flow sensor. 22: Fuel pump control-fuel pump is hard wired to the ignition switch. I know not ideal but it works for now. 34: Knock sensor.

It blinks 55...system ok. Yeah, just my luck!

@thisismatt Thanks for the schematic.

@thisismatt It worked!! Thanks a million! Just ordered an O2 sensor.

@thisismatt I'm on the net right now looking for a sensor. Then I have to figure out which wires it hooks into.

@thisismatt, @bottomwatcher Now we're (I'm) getting somewhere! O2 sensor is going in! As for the speed sensor input, how do I do that? Another thing I'm having difficult finding is a wiring diagram.

@thisismatt Thanks for the diagnostic trouble code numbers. Now I have to figure out where to look and turn the screw...Like really, turn a screw first? Seems retarded. Doin turn table trix and a little beat-boxing with the screw driver. A-chew-it chew--it.

#97

@DanielC No to all three of the first questions. No manuals, think it is OBD 2 not sure, and no O2 sensor of which I wish it had. The engine compression is 180-185 across. EFI pressure is between 30-40 psi according to the gauge. You stated "A ground connected to an intake manifold, instead of the engine block can mess with the EFI computer." I will look into that. I replaced the ignition goodies with factory goodies. It should be good. It better be good! I replaced the distributor with an aftermarket one (the factory one wasn't available) and no change in performance. Your knock sensor story probably had to do with corrosion secondary to a wet environment. Definitely will keep that in mind though. The IAC is set to factory specs to the best of my knowledge. I would have to figure out how to pull codes. No wires to connect to? Perhaps blinking lights? Dunno. I will look into the wiring and ground issues and see if I have faulty connections. Thank you for your info. It's much appreciated.

@datzenmike Thank you for the tid-bit of information. The problem with my cold idle is it runs very rough and will die. I do have an IAC that does work. Still drying to figure out why it wants to run rough when cold. It shouldn't.

@Crashtd420 Yessir, it is a manual gear box. And perhaps the ECU may need additional info. Dunno either. The inquisitive thing is, this problem is hit and miss. It has had several spurts of running top notch. Then crappy again. Weird! It has, for the most part, been an issue with fuel supply and demand. I thought I fixed all the fuel issues. I really think I have. I feel that the issue is now focusing itself on the wiring. This is my next tackle. The car now cuts out under load.

@rosso Thanks for your reply. I have seriously thought about carbing the engine. I like carbs a lot. I am under the impression the issue I'm having with my EFI is simple. It has just alluded me thus far! If I come to a point I cannot figure it out, a carburetor is promptly being installed! :-)

So back in the beginning of 2018, I bought a white VG30 goon from ol' Datsunville Pimp daddy... James blah, blah, blah Datsun-Johnson. He picked up the car from Jason of Bend Oregon who started to install the VG30 from a 1991 Infinity M30. James bought it not running. So he took it to a shop that did absolutely noting but F things up. So he took it to another shop in Sacramento Cali, Fitted Garage, who "got it running." Then James brought it home, frustrated he spent so much time and money on the thing. I came along, the sucker I am for wagons, and bought his problems. Upon driving the thing home, it broke down twice. A day later I called James up and told him of my conundrum. He honestly didn't know how to help. He was just glad to get rid of the thing. I promptly pulled out the feeder carburetor fuel pump that fed into a Bosch VW Jetta surge tank that was installed. That did not fix anything as I found my car on the side of the freeway waiting for triple A. Next I replaced the surge tank with a cheep-o Ebay EFI fuel pump of which conked out a few months later, triple A Then I purchased a factory external Nissan EFI pump. That thing lasted for about a year then took a dump, triple A. Finally I bought a Bosch fuel pump 044 https://www.googleadservices.com/pagead/aclk?sa=L&ai=DChcSEwjRitPq_d_qAhUlGH0KHeW4AT0YABAHGgJwdg&ohost=www.google.com&cid=CAESQeD22ULTFG496dxS-VbUXQlpx9UjAjobtESjKAQgycGjra1uEj4xhIO02yru_cQBuwH_Ai_3gTLO6zDPvRnLBwy9&sig=AOD64_01KpygDp4NU4RSo3O8O2qfbShZqw&ctype=5&q=&ved=2ahUKEwj26svq_d_qAhXmFTQIHTwrC88Q9aACegQIDxA9&adurl= This thing seems to work good so far except... The problem I'm having is a surge issue. The car will cut out or buck and if I go down a hill in neutral the car dies. When it is cold and I start it up it runs rough until it reaches a certain temperature and then runs smooth all of a sudden. Quite noticeable. Could be electrical, dunno. The car has the CANAM 3 relay box from Jeff. It has the 1991 ECU and wiring harness. The M30 was an automatic, as a side note. I recently replaced the thermostat, cylinder head sensor, cold idle unit on the side of the intake manifold, spark plugs, wires, distributor/crank angle sensor, rotor and cap, ignition coil, fuel pressure regulator, fuel temperature sensor, knock sensor, Air flow meter, cleaned the injectors, exhaust pipe and muffler, wheels and tires, blinker fluid and muffler bearing! I even rotated the air in my tires. And the car runs like shit! Can't figure out why the thing runs at all at this point. There have been a few moments where the thing ran good. Few and far between though. The question is, am I having a grounding issue? I'm bout' to put an L-16 tired ass engine with a Hitachi carb back in the junker and be happy it runs good. That's my rant. Crappy EFI junk, VG garbage clunker. Anyone have a good or bad answer is welcome to comment. But seriously tho, I would like to get the thing running good.