Will the pump pump fuel is the battery is low? I have the line disconnected from the filter and I am trying to see if the pump is pumping. I can hear pump when I put my ear up to the tank I can hear it running

So you can hear the pump running but there is no fuel coming out of the tank? Time to drop the tank and pull the pump out.

  Check if the fuel is reaching the injector. Same thing just happened to mine 2 days ago, on my 92' sammy. Fuel pump works and relay, you can hear them kick on. Spray starting fluid down throttle body and it would run. Fuel was reaching injector and injector was not spraying. Pulled t/b harness and hot wired the injector and got it to work. All that lead to one last thing. The ECU or computer was fried on the injector end only, capacitor melt down. Got one from Hawk the following day, solved the problem and was on my merry way.

I am having the same (or simular)  problem with my '91 FI.

1 How did you hot wire the injector?

2 My Computer was reconditioned by Petroworks about two years ago. Think maybe it died again?


Wayne

I am having the same (or simular)  problem with my '91 FI.

1 How did you hot wire the injector?

2 My Computer was reconditioned by Petroworks about two years ago. Think maybe it died again?


Wayne

 To hot wire the injector look for this plug. The red is power and the yellow is the ground, on the far left hand side. Wire direct power to the red for the test, and check results. The ground controls the pulses of the injector which worked for my computer board, but the power to the injector did not.
  I would not think a rebuilt computer would die after 2 years. They rebuild them with better capacitors.

2 My Computer was reconditioned by Petroworks about two years ago. Think maybe it died again?
Wayne

Its possible, a bad battery or poor connections can take out those caps. I would speak to Petroworks, I think that they offer a lifetime guarantee. It would be worth getting them to test it.

When you hot wire the injector, I understand you leave the connection connected so the Zuki will run while hot wired. Is that true?  Or do I disconnect the plug, turn key on, hot wire and expect fuel to flow?

My manual says to check the ohms reading of the injector, one probe on the red wire and the other on the yellow. Manual says it should be .8 to 1.8, mine is 0.00. If I understand correctly, this says the injector is bad. Any comments on this?

I checked the TPI (?) with the ohms meter, and it is within the manual specs, suggesting the meter is ok.

Weather (and honey do's) permitting, I will continue checking back to the ECU with the meter. I will also try to hot wire the injector.

If you guys think of something else, please post.

Thanks.


Wayne

I just got off the phone with Petroworks. They said lifetime on the ECU.

I would like to check everything I can, before I send Petroworks the ECU to be checked. Right now, I am suspecting the injector.


Wayne

My manual says to check the ohms reading of the injector, one probe on the red wire and the other on the yellow. Manual says it should be .8 to 1.8, mine is 0.00. If I understand correctly, this says the injector is bad. Any comments on this?
Wayne

Sounds like a short circuit injector, although it is a very low resistance and difficult to measure- have you got another meter that you can double check it with. I've only had one go short circuit on me when I made a software error and permanently left it on for a couple of seconds. The injectors are expensive so I'd make sure that there isn't something else wrong before replacing it. You can test the injector by just brushing the wires  momentarily onto a 12V source, you will hear it click if its good.

I just tested the injector, with the yellow grounded to the battery, and brushing the red wire,  momentarily, to the pos. post.  The injector does click.

It is raining and cold out there right now, and I am not working in a garage. I am going back to the manual, till it lightens up a little.

I am still open to suggestions.


Wayne

  Sounds like a bad computer, exactly the same symptoms as my problem. You did the same tests also, except for one. Check on the computer harness side, if the injector is receiving power from the red wire. If not, then it is the computer that is bad.

I'm having the same problem. I drove my 1987 Samurai to work Friday went to leave it died. It will start for a few seconds then die. I took the fuel line off at the throttle body then cranked the engine plenty of fuel coming from the fuel pump. This is a carb engine not fuel injected. If you can help me e-mail me at kenbyler|removethispart|@hotmail.com I have tried everything runs great if you stand their and keep pouring fuel in the carb.

do you hear any clicking at the carb when it is dieing. if so check all the grounds at the firewall. note above battery. if not its more than likely a bad fuel cut off sylonoid or the carb is sick and needs rebuilt.

  Sounds like a bad computer, exactly the same symptoms as my problem. You did the same tests also, except for one. Check on the computer harness side, if the injector is receiving power from the red wire. If not, then it is the computer that is bad.

Thanks for the tip. I probably will not be able to check this until next weekend.


Wayne