G50: Code 51 I can't find the problem

[carlosinseattle]

I went through every step in the FSM to locate the problem in the circuit, but to no avail. I even did the continuity check between the ECM harness and the injector sub harness. I then did my own thing and checked for continuity from the injector sub harness to each injector harness. I did the six I could reach, but I couldn't reach #6 or #7 injectors without taking the plenum off.

What is causing the code 51? The car runs rough too. The only other code is a 46, which is for the TCS system.

94 Q45 active with JDM Motor just installed by guys I'd NEVER do business with again.

NEVER BUY YOUR ENGINE OR GET IT INSTALLED AT A ONE JAPANESE ENGINE IN AUBURN WASHINGTON.

http://www.aoneengine.com. $2200.00 later, and I'm working harder than ever on this car.

[Q45tech]

You need to find a Nissan shop with a Consult and the correct card for the active.......................why not have the dealer so a proper diagnosis with the $1800 you saved with a cut rate swap.

Didn't we discuss $4,000 is the proper price for a precision swap.

Now that you have a better engine in the car the dealer should be able to make it right for less. Or tell where and if they didn't do something correctly.

[elwesso]

im not sure its the installers fault... Ohm the injectors at the harness connector and see what you come up with... Sounds like youll get to yank the plenum off (even though you should have during engine install)...

[goody90q45]

I had the same symptoms and lone ECU code last week. Are the female pins on the MAF connector fitting tight on the male pins? If not crimp them. Is the connector corrosion free and greased up?

[carlosinseattle]

You need to find a Nissan shop with a Consult and the correct card for the active.......................why not have the dealer so a proper diagnosis with the $1800 you saved with a cut rate swap.

Didn't we discuss $4,000 is the proper price for a precision swap.

Now that you have a better engine in the car the dealer should be able to make it right for less. Or tell where and if they didn't do something correctly.

Are you saying only Nissan Dealers have a Nissan Consult diagnostic tool? Or do independent dealers also have the consult program and card you mentioned?

[carlosinseattle]

I had the same symptoms and lone ECU code last week. Are the female pins on the MAF connector fitting tight on the male pins? If not crimp them. Is the connector corrosion free and greased up?

Mike I'll be sure to take a closer look at that tonight. And no, the connector doesn't have the little metal clamp/ring attahed to it. I'll go in there and clean the contacts too.

It's funny because Q45tech said that code doesn't neccessarily mean an injector, or harness in the injector circuit is bad.

[elwesso]

Thread merged with the one from the Q45 forum... Thou shall not double post!!!

[carlosinseattle]

I should have mentioned that the car runs rough at idle. It feels li8ke a truck or something, not smooth at all. Does that help with diagnosing the source?

[elwesso]

it is probably indeed an injector.. Do the ohm test as outlined on Q45.org.

[carlosinseattle]

It was my ECU. I did all the checks that the FSM said to do, and everything checked out fine. So I took the ECU out of my 91 and the car ran flawlessly. Turns out the ecu had some rust on and in it. I removed the rusted, and soldered a jumper wire in place where the chip to board connection was corroded and it took care of the problem. I guess all those years with R/C cars and slot cars paid off.I put the ECU back in and it runs like a champ. All engine codes are clear. Now on to the ABS and Active stuff.

[maxnix]

Great! Hope they didn't skip the other rehabilitation items before the engine was installed.

[carlosinseattle]

Great! Hope they didn't skip the other rehabilitation items before the engine was installed.

I'm afraid they didn't do anything. I'm still very disapointed in the job they did. At least they put in new motor mounts.

[Q45tech]

BUT YOU TEMPORATILY SAVED $1800 in the budget install, just be ready to spend it on the plenum hoses, knock sensors, gasket replacemements.

New Motor mounts good.

Sounds like you got what you paid for a no frills/no pm engine swap.

[carlosinseattle]

BUT YOU TEMPORATILY SAVED $1800 in the budget install, just be ready to spend it on the plenum hoses, knock sensors, gasket replacemements.

New Motor mounts good.

Sounds like you got what you paid for a no frills/no pm engine swap.

They did the gaskets and Knock sensors. I made sure of that. Looks like I'll "get a hose job" soon. You're right, it's better to take care if it before it takes care of me.