As some of you know may know my engine had that bad knocking that i recorded on video a few months ago. Instead of rebuilding it i got a free engine from my cousin.

The engine came out of a 89-91 maxima (i think because the fuel injectors and rails are different than my 94)

Anyways, we did the swap..changed timing belt and water pump. I'm using the 94 rails with new 1994 injectors on the 89-91 engine. Also the intake plenum is from the 94.

The problem i'm having is the car shakes really bad when the gears are in D,R,1,2 on complete stop with brake pedal depressed. P or N doesnt have any shakes. The car takes really long to pick up speed. If i floor it the RPM would go to around 5000-6000 rpm as it slowly picks up speed. Eventually it gets up to speed and runs ok. The Over Drive is also not working ( when i click on it the tranny doesnt down shift to 3rd)

I have new spark plugs, wires, and injectors and the timing is correct. Could it be a tranny issue?

Please help, i've been working on this for the last 2 weeks without any progress.

 

Always tough online to diagnose something like this. Typical things are to go back over EVERY sensor and connector. I assume idle is set in range. Should also check vacuum lines, seen similar issues there. Primarily as they are connected to the fuel pressure regulator.
Although first thought is This may be a timing issue.

 

Would vacuum lines or timing off cause the over drive to not work?

 

Maybe, but not directly. If the engine is running poorly and fumbling, the tcu may be getting information the engine is working too hard to lock in the torque converter.
Even being a separate issue, addressing the engine issues seems to be the place to start.

 

Are you sure ALL the injectors are hooked up and firing?

One time on my black VE 5 I had these EXACT symptoms after doing some work on the car. It would shake VERY bad - although not die, it had absolutely NO power, it took forever to pick up speed (I felt like I had to rag on it to even get up to highway speed), etc.

It turns out I completely forgot to hook up the rear injector harness so my car was running on just the three front cylinders that entire time and giving me the exact symptoms you describe.

 

All the injectors are new except one. That one injector was working on the old engine. Also the idle rpm is like 1500 in park. I'm thinking i got a bad engine? I'm taking the car to someone who knows alittle more than me...i'll keep everyone updated.

Also i pulled the following codes:
13 Engine Coolant Temperature Sensor. ( this was changed 2 months ago on the old engine, so i know the ecu is lying)

33 Heated Oxygen Sensor. (i have a new o2 sensor 3-4 months ago when i changed my exhaust..ecu lying again? )

51 Injector Circuit. (huh? all injectors are working )


Thanks for all your replies guys.

 

Just because the injectors ohm out or are new does not mean they are working. Again, may be a plug. Also, those old harnesses are prone to become brittle, crack, and break wires.
Ex: When I first got my '89 over a decade ago, I kept blowing driving light bulbs then popping the fuse, knew I had a short. Tracked it down to the huge harness running in the driver's fender. After inspecting the harness and moving it around, I gave up. However, after doing all that and putting the fender back on, it has NEVER happened again!
Point? I don't suspect your ecu is lying, it's actually giving you some good info about where your electrical issues are.
In my experience, the coolant temp wire is often one that deteriorates and causes issues. I'm convinced that is why both my fans run constantly when I turn the ignition on.

 

Thanks very much you guys hit it right on about the injectors.

I ran a test probe and couldnt get any voltage out of the harness on the front injectors then i checked to see if the main harness was connected correctly and it wasnt. It was switched around with a harness on the transmission. So now all injectors work and i have alittle more power.

Now that all the injectors are working my RPM surges from 2000 to 1500 in Park and when i'm driving there is a hugh miss. Any ideas?

Thanks very much.

 

Heres some updates

My cousin took the car for a few days, he found that the old ECU was dead and wasn't firing on the #2 cylinder. The new computer fixed that.

I'm still having a surging idle problem. When i squeeze the idle control hose (from intake to stepper motor) the car idles down..when i release the hose the idle will surge from 1500-2000. I bought a motor from ebay that was claimed to be from a 100% working car..but that didn't help anything. I also tried 2 different motors i had lying around. Currently i'm driving the car with a hose clamp screwed into the hose to reduce air flow causing it to idle normal.

Could this be a stepper motor or another sensor? I'm also using a longer hose because my original has a very nasty crack.

Thanks

 

I not sure if this helps but someone here wanted to use 93-94 injectors on his 3.0 gen and found out that the were differences that was just more that the injectors. I wish I knew exactly what that was.

 

Yes, the rails won't work. He will need the 93-94 rails. I also purchased a set of the injector rubber seal because mine were cracked etc.

 

It was Cmax03. He states the recess areas are different also

http://forums.maxima.org/3rd-generat...onnectors.html

 

oh yeah, i forgot to mention that. I also had to swap that lower middle intake portion over too. Since i kept my original engine i just swapped over pretty much the entire intake manifold. I'm going to rebore my original engine and put it back in next year. I don't like working in the winter