Thanks for the help and advice. I always been mechanical but very deficient when it comes to carburetors.

Gene

Yes. And many of us prefer EFI.

If the only problem is the computer going bad, I'd move it to a cooler place, away from the heat and vibration of the engine. You could also use a MegaSquirt ECU to replace the bad computer, they are less expensive.

The manufacturer told me it could take 190. Deg. F. THe original position was dead on top of the manifold at the hottest spot of the engine. I moved it to the outside and put a fan on it with a thermostat. It never got above 140. The next time i moved it completely off the machine figuring that the vibration killed it since the heat had been solved. Each time I moved it and thought I had it solved. This time I extended the cable 4' and its under my box truck in a water tight box. No heat and no vibration. It's is actually number 4 counting the first.

Gene

Gene

Just saw a megaSquirt and it has the same connector that zenith uses. Strange coincidence except they use black instead of grey

Gene

Hmm.. megasquirt is $300 in kit form $500 finished.

Here's a shot of the computer

http://i230.photobucket.com/albums/ee ... imagejpg1_zpsa4bee84a.jpg
http://i230.photobucket.com/albums/ee ... imagejpg1_zps37d159db.jpg

How did you end up solving this?

A15 industrial engine from 2002



Zenith Fuel Injection





Zenith ECU

It is a Zenith ZEEMS throttle body EFI system along with matching ECU computer

here are the photos saved years ago, plus a couple others such as a wiring diagram

Attach file:

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  2002 NISSAN A15 ENGINE FAMILY 2NSXB01.5450 (off-road) imagejpg1_zps27f8c5c1.jpg (149.38 KB)


  ECU imagejpg1_zps37d159db.jpg (66.21 KB)


  ECU imagejpg1_zpsa4bee84a.jpg (85.73 KB)


  side air inlet on downdraft throttle body zps-A15.jpg (56.38 KB)


  Air Temp Sensor zps-iat.jpg (49.59 KB)


  MAP Sensor zps-map.jpg (59.49 KB)


  stock manifold with adapter plate imagejpg1_zpsd151a049.jpg (107.52 KB)


  Throttle Body DSC05083.jpg (90.72 KB)


  Zenith A20098 (2004) zps-gov.jpg (77.21 KB)


  Throttle Body zenefi.jpg (70.12 KB)


  Wiring Diagram zps-wir.jpg (102.04 KB)