need advice ka24e engine won't run

[rckythmas]

I have a 96 nissan 4wd pickup. I was driving home from work tuesday and it went dead(engine). It just free spins like it has no compression. It does, also spark, and correct gap .040. I have checked the fuel pressure it is 45 psi before the rail. When I try to start it i smell fuel. The only way I can get it to detonate is by pulling the fuel pump fuse and spraying starting fluid in the intake. Any help would be appreciated.

[longtooth]

3 things make a engine run. Fuel, electical, and mechanical.Do you have spark? injector pulse? do you have GOOD compression? Is your fuel pressure within factory specs?

[rckythmas]

Fuel pressure according to the book is supposed to be 33psi with vacuum and 43 psi without vacuum, Iinstalled an inline gauge and when I turn the key it goes to 45psi then as the motor spins its is around 41psi.I have spark on all 4 cylinders and the plug gap is .040, which is what the book says its supposed to be.Didn't check the compression with a gauge, but it will suck your finger in, then blow it off the hole with a serious air blast. (sounds really good compression)I am not sure about the injector pulse yet.

[rckythmas]

I have noticed something else, I have an injector pulse on 1&4, but solid 11V on 2&3. I take the injector wires off 2&3, it tries to run. So, 2&3 are flooding it out?? what would make injectors 2&3 have a solid voltage? 1&4 have a pulse.

[RT22]

Not sure but i would guess the engine control unit controls fuel injection. Find a wiring schematic may have a relay or fuse or something that controls the injectors between the ecu and injector. otherwise it may be the ECU, if so try a junkyard for cheaper than new replacement. Or find a buddy if you have one with same model ecu to swap and test.

[Rev_D21]

There is some useful information in here... http://www.nicoclub.com/FSM/ha...c.pdf

Sounds electrical to me but not sure.

[rckythmas]

Very good manual, thanks.Only thing is I unpllugged my battery to charge it, and the code reader only tells me.... passno codes found.