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DANIEL REYES is a THIEF
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Discussion Starter #1
Let me get this out of the way first, the engine isn't running at the moment, sorry to dissappoint. :(

After long hard hours (mostly removing stuck parts off my car, you'd be supprised how tight a gasket can keep two parts together alone) I finally got everything to match up. Yes, everything. The AAC can indeed fit, you just need to file out the holes for the screws wider and buy longer screws. They're a different thread size than what came off the e16 tb, but they're in the same place.

Everything bolted on, and everything reconnected properly...
...and here's the problem. You can see that there is no gas being injected, and there isn't any smell of it either.

Do the injectors have different electrical resistance, by any chance? Does the GA's fuel pump have more pressure? Is the pressure regulator (according to the book, 14 psi for the E; 34 for the GA) keeping too high of pressure? Any one know off hand? Am I just missing an idiot mistake? Any ideas? Any suggestions?

So close yet so far...
 

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Ex-mod/nissan guru
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2,136 Posts
have you tried disconnecting the fuel pressure regulator... it should increase slightly the pressure... (just the vacuum line to it)
as for the injectors i dont know the specs of those...
 

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Ex-mod/nissan guru
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BTW... are you sure you plugued the injector instead of the manifold temp????.... those 2 plugs are the exact same !!!!!!!!!... try inversing those !! :)
 

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Crazy-Mart said:
BTW... are you sure you plugued the injector instead of the manifold temp????.... those 2 plugs are the exact same !!!!!!!!!... try inversing those !! :)
Hehehe that would be funny
 

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DANIEL REYES is a THIEF
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346 Posts
Discussion Starter #5
Yes all the plugs are indeed in their proper places, as funny as that would be (and do I ever wish it were that simple..) but I put tags on each where they should go, along with drawing a diagram. (I'll be damned if I hook stuff up incorrectly!)

As for the pressure regulator, according to 'the book' (Haynes, fyi.) the regulator on the GA16TB has more pressure than the the one off of the E16TB. That said, removing the vac line would increase it even more.

So... any other ideas/answers?
 

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Ex-mod/nissan guru
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your fuel pump is working ??? as sure another funny thing here but have you put back the fuse ?? ;) hahahah...still could be this !!??... anyhow do you hear it working when the switch is on ??
 

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DANIEL REYES is a THIEF
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346 Posts
Discussion Starter #7
Ah yes, the possible mighty idiot mistake..
However, the fuse is indeed in place, and the fuel pump does whirr... although a bit quieter after the first half-second, I suspect the higher pressure from the regulator, but could be other things as well.. (other problems? gah I hope not..)
The car worked before the swap, so all the other components outside of the throttle body are in working order.

I really hope to solve this soon... would like to drive it before spring time :(
 

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Still moderating..sorta
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Have you tested the injector with a voltagemeter??? Maybe you bought a bad injector??
 

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Nissan/Mazda Gumshoe
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1,052 Posts
while we re on the subject guys where is the fuel pressure reg on the e series motor , that is something that i might want to look into after i replace this very fraid ground for the alternator
 

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Ex-mod/nissan guru
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2,136 Posts
its just below the intake fuel pipe (2 pipe 1 in 1 out ??)... its screwed there on the tbi...
 

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Ex-mod/nissan guru
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got some news for us ???... is it working now ?????
 

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DANIEL REYES is a THIEF
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Discussion Starter #12
Unfortunatly, no news. The injecter tests out fine at 1.2 ohms..
I'll have to post-pone elaborate testing, though, until I replace the water pump in my 87 Sentra for the winter (It's the only car that I have heat in).

Honestly, I can't think of any reason for things to go sour :(
 

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Sentra Specialist
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1,902 Posts
WhiteFox said:
Unfortunatly, no news. The injecter tests out fine at 1.2 ohms..
I'll have to post-pone elaborate testing, though, until I replace the water pump in my 87 Sentra for the winter (It's the only car that I have heat in).

Honestly, I can't think of any reason for things to go sour :(
***** Gentlemen, I've been away from the boards for a while. Just logged in to see what you guys are up to. Whitefox, great to hear you are slugging it out with this new swap. As always, the first guy paves the way for the rest. I got out the factory manuals ['88 and '89] and I think I got it figured out. The GA16i cars all used a "Dropping resistor" between the battery voltage source [hot wire to injector] and the injector itself. The E-series powered cars did not. The dropping resisitor can be gotten at any junkyard, and is small enough to fit in your pocket. ;) It is located on the top center of the firewall, just slightly favoring the driver's side. It is silver, and is secured by two #3 phillips head screws. You need to get one, and wire it in. Cut off and save the the connector for it, to install it on your car. My guess is, that it will start right up. :)
 

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Nissan/Mazda Gumshoe
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tbi?

i have the hitachi sitting on my motor man , what do u mean tbi?
 

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Nissan/Mazda Gumshoe
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hey crazy, i know what tbi means . i was just under the impression that i didnt have tbi since my motor is carbed. sorry , dude.
 

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DANIEL REYES is a THIEF
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346 Posts
Discussion Starter #17
I haven't been fortunate enough to find a junkyard that has a junked Sentra of that year, yet. I'm still searching...

Alternatively, are the injectors the same for the e16 and ga16? I'm sure the size is the same, but what about the specs? If things still don't work out, I just may put my original injector into the ga16 tb and use an aftermarket fuel regulator.. nothing should be any different from the factory E16 set up, aside from a wider opening throttle body.
 

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That sounds like a great idea, but if the injectors were the same wouldn't they have the same resistance???
 

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Sentra Specialist
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1,902 Posts
WhiteFox said:
If things still don't work out, I just may put my original injector into the ga16 tb and use an aftermarket fuel regulator.. nothing should be any different from the factory E16 set up, aside from a wider opening throttle body.
***** Whitefox, that may be the simplest solution. In order to remove and replace a tbi injector, remove the little rubber cap that reveals the terminal loops at the top of the injector. Remove the harness connector for the injector plate cover, unscrew the top plastic plate, don't lose the thin O-ring under the plate, and unscrew the aluminum injector cover. Make note of how deep the injector is in the tbi body, before you take the injector out. That way you will know if you have tapped the new one in all the way later. Then yank out the injector. I don't know if there is a special tool for that, but if there is, I have never seen one. I carefully grab the plastic top of the injector with a pair of vice-grips, twist and pull upwards. Make sure you spray some WD-40 or the like, on the injector O-rings, and phase the injector correctly, before you put it back in [there are pos. and neg. terminals]. I usually tap the injector in fully with socket that just fits around the top of the injector. If you have not tapped the injector in all they way, you will know quicky, as it will leak like crazy and flood the engine. I usually cylcle the key once, to run the fuel pump, and check it visually before staring it. Good Luck!
 

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Nissan/Mazda Gumshoe
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1,052 Posts
hey guys , quick question. i maybe out of the loop but whats the diff between the e16i and the e16s . i was told that i have the s motor. just wanted to know the difference between the 2, thanks.
 
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