i cleaned every ground i could find....i swaped AFM'S ..wiggled and messed with everything i can think of....she just turns over and over i pulled every plug, one at a time and checked for spark ..there is a bight flash on each one .....i used the noid light on the injector clips and it doesnt flash at all ......i have a ECU on the way but i dont think that will fix it ......but what other than that could it be?? ....i pulled the upper hose on the fuel filter and turned the key and i could see the the fuel pump is pumping gas ...my ragulator guage shows that fuel is going though the rail and back to the tank .....i dont know what to check ......i can hear my fuel pump turn on every time i turn the key ....i replaced the tps sensor and i have a new o2 sensor .....i cleaned and checked any and all things that i could think would cause this problem ....
i have a new head temp sensor on the way {msa is so F'en slow }
with the new ecu and head temp sensor i still dont think it going to fix it
i really have gone over every connection i could find ...cleaning and makeing sure there all tight ....i have a bunch of extra zx parts like relays and fuseable links....
i have switch it all around and it still has not changed the problem ....
i even switched ALT'S around and that didnt fix it ...
well as you can see...... I NEED HELP

 

when the car won't turn over: there are only 2 main reasons: NO SPARK, or NO FUEL.

you have spark... so... your injectors aren't spraying if you have fuel pressure. Have you made sure to ground the ECU ?

 

i have cleAned 8 grounds in all.... there were all over the motor conpart ..i dont think i missed any but i will go look though her and see if i can find more ....i will post back in a few ....

 

sound's like the same problem I am haveing 81. Sound's just like me. please if ya get here running, let me know.

 

i checked 5 black wires that come out of the ecu ...they all went to diff things............ i think two were grounds one was o2 sensor and one went to the the ecu relay ...all off them seemed to be in tip top shape .....i couldnt track down the last one there wasnt alot of light left and i have some stuff i got to go do,,,, we'll back on it tomarrow i guess ...
if you have any idaes i would love to hear them

 

have u checked the side of your disstributor ? is the little black box gone ? that might be one problem ? please check cylender compression why ? maybe u might have sized pistons ? thats the best i can offer right now until i can think a little bit more " live life to the fullest in the left lane in your " Z "

1982 280zx turbo 2+2 stage 3
1993 300zx n/a/ 2+2 stage 3

 

nismo619...
The car used to be running (if I'm not mistaken). So whatever u were saying about "sized pistons" (dunno what that means) prolly isn't the case. Also... are you just "copy & pasting" your signature??? You CAN make that permanent, to show on all your posts.


Blackie...
It really just sounds like your injectors aren't spraying. That could involve the drop resistor. Do you have the ECU bolted down? I know that the 280zxt fuel pump control unit must be grounded by bolting it onto the metal frame.

I think the prob has been pin pointed... now to find out why the injectors aren't spraying...

 

Call me simple minded... But did you pull an injector and watch for spray?

 

i have two drop resistors ...so thats not it ...i have a new IM ...the little box that is on the dissy ..so thats not it ....the car was fine the night befor all of this and i know for sure the head and pistons are golden ..it started and ran fine and then the next moring all it would do is turn over and over ...as for watching the injector spray .. when i pulled the plugs and i could see that there was no fuel on them and all of the plugs sparked very bright .....i also used a noid light and could see the there was know flash at each injector clip ...i have new clips and injectors they all worked fine the night befor this started .... well i hope this ECU gets here tomarrow.... mabe i do have TWO ECU'S that are doing the same thing ...
not likely but MABE ...I HAVE DAM NEAR TWO OF EVERY PART and swaped in and out most all of them and still all it will do is just crank over and over ...
after i ran the batt dead ...i took it out to charge it up and when i put it back in...... it almost started ..i heard it fire a little gas in there becuase it started to start and the tach moved and then it droped back down and went right back to just turning over ....
man i hope that this ecu fixes it ...could the fuel pump make the ecu not open the injectors ????...my fuel pump looks in good shape .. hayness says that if the noid light dosnt flash then i have a faulty ECU ........i just dont know what to think anymore......
i will be back at it tomarrow moring ..as for now i think its time to go get to smoken

 

What year is the 'other' ECU from that you have coming in the mail?

I forgot where I saw this info, but recently on some web page they listed the 280ZX as having only two different ECUs. 1 for 1979, and another type for 80-83 (non-turbo)

Seems that if your original ECU has a problem then the '79 won't fix it. So maybe your next ECU will help... ?

 

Sounds wierd but one time my fuel pump froze but it was reading good OHMS... After I checked everything else I hooked the battery directly to the fuel pump [thats right 12V] and it did its humming thing for about a minute... hooked the battery back up and that bad boy fired right up..

 

Starting Fluid!

 

OK Black... I know we've talked about the fuel pump before... but all this new talk makes think maybe you ought to just crawl under thw back of the car and give the pump a couple of good "Taps" with a hammer... Just for giggles and see what happens.

Rod.

 

i just tryed it and it didnt fix anything .....when i turn my key just about half way on ....i can hear my fuel pump kick on and i can see the i have 35 psi on the fuel presser ragulator gauge ...i tryed the tapping thing anyway and still nothing...
the ecu hasnt gotten hear yet ...man i hate waiting on **** ...

 

I'm reading back through this today and I think Rod and s/c may be on to something.

This is really starting to sound like the fuel pump...

 

just checked it again and if i turn the key just to about where the motor turns over i can hear the fuel pump start working ...i had my girl do this while i watched the fuel presser gauge and the gauge went right up to the 35psi mark and stayed there ...
the fuel pump is working like it should be .....

 

Sorry to hear it man..That is no good

 

starting fluid! If you have any spark at all, that will ignite. Maybe your plugs are now drenched with fuel... ?

I dunno! Just shove some nitrous and starting fluid in there and fire it up!

 

Good point... if you've been crankin on it over & over & over, it very well could be flooded. Have u pulled your spark plugs today to check them? If they are wet, clamp off the fuel feed line before the fuel rail, and crank it @ full throttle to clear it up.

try try try... we'll eventually figure it out.

 

How bout the NOS energy drink?? Thatll work on the car..

 

i have spark my plugs are bone dry ...if i use starting fluid it just stop working as soon as the fluid runns out ....what would be the point of that ...i hope that its just the ecu ....i should just run to the pick and pull right now and get the head temp sensor and ecu that is there .....i just allready payed for both of these and there taking for ever to get here if it isnt the ecu i dont know what i will do mabe just SELL IT

 

Side note... not to get off topic.

hold up... s/c... is that your engine in your sig??? from the cardomain page of turbozfeak??? http://www.cardomain.com/id/turbozfreak

 

The point would be to prove to yourself and us that it really is dry of fuel. It will start and fire a few times (hopefully in good timing) and then sputter and die.

 

so plugs are dry... fuel pump works... looks like we are back to asking why the injectors aren't spraying.

 

Plugs Are Dry And Sparking I Just Checked #1 #2 #5 All Were Dry And Had A Bright Flash............IAM GOING TO THE PICK AND PULL.... BE BACK IN TWO HOURS