Hello board!
Got the radiation, chemo AND engine swap done in 6 weeks. . Funny part is the car is running about as good as I am. NO POWER when taking off and will not manually downshift. It is a 1991 Maxima with auto tranny. The "turn off O/D" button doesn't work either. I am NEARLY positive I got the timing belt on right but the best the timing can be set is three notches from zero. The engine runs pretty good, no backfire or missing going on but there is just no power when driving. I bought the engine from a junkyard that SAID 180PSI on all 6 calendars and 132,000 miles. Anybody have any ideas?

Oh...there is a vacuum line that comes off the top of the tranny and ends in a 90 degree metal tube that is not connected to anything. It was just strapped in with the other vacuum lines. Is it a breather or am I missing something from the start?

Thanks!!!

 

Maybe it's because I don't have 15 posts nobody has any suggestions?!? hahaha. Well, I cleared three trouble codes but the 51 is still blinking. Looks like a fuel injection issue. I still have the engine I took out with its 6 injectors so I guess I need to do some detective work. I wonder if I unhook one at a time if I will be able to tell which one is bad? Wish you guys were speaking to me.....it would shura help! .

 

As far as misfires go the vg's are notorious for bad injectors but I guess it's to be expected being they're over 20 years old and your assumption is correct on the breather hose from the trans.

 

THANKS AC!! Thought I was invisible. I understand the "Newbe" status and avoidance of us trolls and lurkers from being a long time senior member of a motorcycle board. Glad to know about the vent tube! Now.....onto the next problem...the injectors. I tested them with the ohm meter and actually did some swapping between engines before I put her all back together. The ohms are good but I didn't have them checked for plugging issues. . Code 51 .....damn. Wish it was something I didn't have to take the thing apart again to fix! Maybe I will just take them down to a local shop and have them tested and cleaned. Take all the guess work out unless someone here has a good way to test them without taking the intake off again! Still ...... I don't feel too bad. The last motor I swapped was the ONLY other motor I ever swapped ....was in 1991 when someone bought this car off the lot.. It was a 1974 Chevy van straight 6. I had a little can of left over nuts and bolts but we pulled all our worldly belongings from Fairbanks to Seattle and drove it for 10 more years before selling it. that and being in radiation and chemo for Stage 3C colon cancer during this swap.....I think I did OK.
Thanks again for the reply AC. IT IS GREATLY APPRECIATED.

 

Found a guy just down the road that specializes in fuel system rebuilds. 25-35 bucks each injector so I brought him all 12 (6 from each engine) and he's going to test all and rebuild 6 good ones. There are 4 different colored ones he pointed out that he's eliminating from the start. They were brown where the originals are pink. Stoked! Great guy and all the mechanics in the North Seattle, Everett, Marysville area use him. Wright Automotive.

 

That sounds like a pretty reasonable price. If you check around on ebay you can find them pretty reasonably priced too. If you use a multi meter they should ohm out between 10 and 14 ohms. make the o rings are in good shape too and that they are all seated properly in the rail but all in all sounds like you did a good job. It runs so after all that work taking the upper intake back off to change some bad injectors should be an easy job for you. I think the pink ones are the jecs which are the stock injectors though other aftermarket ones may be pink too. There should be a coloured dot on the injector and i believe they are different between 89-92 and 92-94. I think there are green dot and black dot but i cant remember what the difference is. Maybe flow rate? Hope all is well with your health and that your treatment is going well

 

Thanks AC
I did the ohm check before I buttoned it all up. Actually swapped a couple out with the old engine so they would all read the same. 12.5 if I remember right. It took about 10 minutes to get down to the injectors. . I was just whining. . http://www.wrightsautomotive.biz. Is the shop I found. Love this guy. Hopefully the car runs after they're rebuilt! I was amazed at how smooth it feels going down the road downshifting(automatically, because the manual shift doesn't work). It's like butter how it goes between gears! The "floating mounts" seemed odd to me but I'm sold now. Actually we bought a 91 Sentra off the showroom floor in Fairbanks before we moved to the Lower 48. It was a good little car!

 

So, I've swapped the engines and it fires up and runs but no power. I pulled the #2,4 and 6 injector wires and idles the same. I had all 6 injectors rebuilt as well. I unplugged the sub harness and tested the contacts with the engine running. I know from reading on this site that there are 3 hots and 4 pins ?!? Anyways, 1 pin has constant juice. The others are dead. No intermittent power that would signify juice going to the injectors intermittently for the compression stroke. Anybody have a clue here where I go from there!?!? help!

 

Hello guys, I figured if I got a few pictures on maybe I'll get some help. I posted this in the General Discussion as well and may get blasted for it but...fishing for answers!
I have no pulse power going to the 2,4 and 6 injectors on this Gen3 1991 Maxima. Ive heard it never had much power before the timing belt blew and this is probably the culprit. I replaced the engine and installed new timing belt on the replacement. Looking at this set-up and it doesn't jive with the wiring diagram but being "Not a mechanic" I thought maybe you guys who know these cars might be able to help. Here is the harness that comes out of the Main Wiring Harness:

It, as you can see, has only 3 wires. A red plug in # 4 which, if my deductions are correct, is supposed to feed injector #6.
1 of the pins has constant 12v current when the key is on and heads up into the main harness. Another one splices into the AAC harness here:

Coming out of the main harness in the same group as the 2 other FI wires is this wire that splices into the transmission harness wiring with the same small brass crimp splice.


It splices into the harness that feeds this jacketed AT wire harness.


So, it looks pretty weird. A couple questions come to my "not a mechanic" mind.

1) should the plug on the main harness side have 4 wires going into it? In my mind...reading the wiring diagram, there should be 1 for each injector for the pulse signal and 1 for the power.

2) dumb question probably but...did Nissan ever splice like this or is this another backyard mechanic like me. . Doing his best to make it work?

3) where do I go from here to get the power to the injectors in the right firing order?

4) because I have only 14 posts is anyone even going to reply.

Any help would be greatly appreciated!!!!!

 

Giving up on this forum I'm afraid.

 

Sorry to see you go.

 

Sorry i cant help you with this one. There's still quite a few but just not a whole ton of us 3rd geners here so have a little patients with responses and im sure you'll eventually get some answers. Theres a member named DennisMik here on the org. that from what ive read in his posts seems to be pretty knowledgable on the electrical side of things maybe he can help?

 

Thanks AC. You've helped a lot already and I appreciate it. :-).

 

Thanks For the reply George!

 

Thanks for the reply George!

 

George is "far from a mechanic" lol. Stick around and you'll soon get to know that. He's an interesting character

 

Oh, I'll stick around. I was getting crabby. Hahaha. The oncologists say I can blame the chemobrain for mood swings. .

 

I was commenting when I pulled the motor that it's awesome that All plugs are unique on this car .......I see now that that's not exactly true. All unique except the 4 prong to the injectors fits the 4 prong to the tranny. Ya.... I was sending pulse power to the tranny and shifting the injectors. :-/. Hahaha. I found the right four color wires coming out of the harness and followed them to a 4 prong plug. Jaw dropped. Then I danced. Hahaha. Not a mechanic felt pretty silly but....I danced anyway. Hahahaha. Thanks to those that replied!!! It's what makes these boards so helpful and successful. Not post counts and Senior Member status....I am a Sr Member on a number of boards but I don't get involved in the drama...just there to share and help. .

Aloha all and Mahalo again!!!

 

I could smell a little sarcasm in George's comment. Haha. But at least he replied!!! The thank you was with all earnestness. .

 

Nope no sarcasm. Good to have knowledgeable active folk on this forum