I have a 3 cylinder FX.

S

silverFX

Member
Location
Newburgh, Indiana
Car
Sold my 2003 FX35
The left bank of cylinders is not firing. The deal replaced the ECM because the car would not start. They saw that it was not running correctly but they noticed my fuel injectors were not OEM. They would not touch it after that. I put the OEM back in and it still runs the same. dah!

I found out it was only running on 3 cylinders by pulling each wire off of the coil pack and starting it up. I did the entire left side and everything was the same. Pulled the right side and each time the car starts and then dies. I don't have a code scanner. (Just ordered one) So my question is:

What could cause the entire left bank not to fire? All six coil packs look good. (No blistering)

TIA
 
I know on other cars I've worked with, gm's, the ecm used quad drivers in the ecm to drive the injectors, & if you swapped out to an injector with less resistance you ran the risk of burning out a quad driver... it may be possible that you have an issue like that? if that's the case, the only solution is to replace the ecm/ecu whatever, technically the dealer was right in not warrantying it if this is indeed the problem... what injectors did you use & are you sure there compatible?
 
I had a simiar issue when they were putting my car together and it turned out that one of the Injectors was not plugged in. However, when they put a tester on it, the tested showed exactly which cylinder was not firing. I would gess that if all three on the same side are not firing, it may be a nick in the wiring harness or maybe a blown fuse???.

The Nissam version of the Code Reader is a $2000/$7000 computer that testes everything. Maybe for $75 or so you can get someong to look at it for you.
 
Is it the injectors not opening or the spark plugs not firing?

Can you swap coil packs from one bank to the other? All the injectors are on a single break out harness. Which bank are you referring to as left right?

Passenger side is 1/3/5
Driver side is 2/4/6
 
It is 1/3/5

The spark plug on 1 looked wet and I have "water" coming out of both tail pipes. The "water" does not smell like fuel but I am assuming that it is. I think I am sending in fuel.
 
K, bank 1 the coil packs are harnessed kinda different than bank 2.

1/3 and the cam timing solenoid are all on a break out harness. 5 is on it's own connector. If the "water" smelled like fuel I would think the o ring might be ripped on the injectors.

You can test spark on the plugs by having the plug and the coil pack outside of the cylinder and grounding the threads to say the timing cover. Think rest the coil pack with plug in the coil pack, and resting it on something metal and turning motor. You should see spark if the coil, and plug are good.

Now how much water are you talking out of the tail pipes? Is your coolant reservoir looking ok? No brackish brown bits floating?
 
I was thinking the "water" was the unbunt fuel from 1/3/5.

The plugs were changed about a 1000 miles ago to iridium.

The coolant is a very nice green. The coolant was replaced about a 1000 miles ago too.

What about the cam sensor. how do I remove it and check it.

There is not a huge amount of "water" maybe silver dollar size after five minutes.

I wil test the spark/coil after a bit.
 
Cam sensors are on the backside of the heads. It's not a typical connector with just a lever release and pull. Its a push release to eject the connector. To swap wouldn't be too hard but I would make sure that's the problem before ordering up a sensor.

Are you getting any codes to work with? I could see a bad sensor throwing off the whole bank.

There was a theread on my350z recently. I'll look for it in a little while.
 
news flash

I have #1 Iginition coil in my hand. I do see a blister next to the connector. I think I may have found my problem. I also checked the coil resisitance and it does not add up. (according to this write up)

http://forums.maxima.org/5th-genera...oils-i-tested-only-replaced-2-how-w-pics.html

Now I just need to find the part locally and I hope I am good to go. I also need to check the remaining coils to make sure I am fixing the entire problem.:6wink:
 
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