Today as I was working on relocating the knock sensor mod, I knoticed im getting intermittant codes 45, 51, and 15.
The only way to read them is through conzult/data scan/other programs.
I think this is because the codes only show up for like a second and disapear.
It hard to clarify, but 95% of the time i will have code 55. But sometimes i will randomly get code 45, 51, or 15 for just a second and then it goes back to 55. This is when idleing and driving.
I know what the codes stand for, but what could be causing them to only trigger for only a second and go away?
I also know one of my injectors is ohming a little out of spec (high)
that might be setting off the injector circuit.
What triggers an inject leak though? (how does the computer know it has one)
I could be wrong, but I think that the ECU monitors the fuel pressure for either side of the engine. As for why they might be showing up only once in a while, I could only think that the injector is on its way out and sends the right signal only part of the time, leading the computer to read that the pressure on tha side of the engine is either wrong or right. Unfortunately, the codes are not too helpful with telling you which injector is going nuts so you have to go one by one to see if one or more is acting up. Which I could be more helpful. You might want to ask the all wise JT240Z, that man is the encyclopedia of the Z.
I JUST went through this on the kid's N/A...
1 injector was at about 20 ohms ( static ).. but randomly it would toss the code.. and light the light.. once replaced.. it went away.Most circuts will tell you a value is to high ( or low ) open or shorted.. or the current draw is high or low. like the brake light idiot light! The injector circut works the same way.
Wiring & grounds are critical for the Z to not get a bogus readings from senders and have the ECM send a correction to the engine ( which it doesn't need ) and the performance suffers.. I took a DAY and chased as many grounds as I could and cleaned them up.
NOW no weird intermittent issues, ( just a fair amount of HARD failures ).
Mike
Funny... the z32 factory service manual makes no refferance to code 15 and I've never seen it either. Now 51 I've seen a few times. There is a code 15 on a 240sx ECU but the Z32 never listed it as a valid error code.
Either way it seems like you have an intermitant fuel issue based on the other codes.
No but it would say DUDE alot~ Or Bro ( pronounced Brrraaaaaaoo )
Other symptoms:
Drink Corona's & steer towards the beach.
Wear really dark Rayban's
Take the tops off & blast the A/C & Tunes.
It might not light the light.. but it would throw the code.. dude..
( SEE ! )
You could send me your ECM & I can resocket it.. I also have a fed chip.
Bro
Mike
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