running on 3 cylinders, the phantom ka24e-t

[sstomek]

The engine from the beginning only ran on 3 cylinders. It was the 3rd cylinder that would not fire. After swapping the 3rd cylinder injector with the 4th cylinder injector the 3rd cylinder started working and the 4th stopped. So naturally all signs pointed to a bad injector. I then purchased 2 more 550cc RX-7 injectors and replaced the "defective one". The engine started working on 4 cylinders...so i thought. after adding the turbo parts I had the Apexi SAFC hooked up with an n60 MAF. The car would start up and slowly die out. Hooked up a boost gauge and got 20 on the vacuum side. So we then we unhooked the MAF and the SAFC. The engine is running on 3 cylinders again ( number 3 stopped working again).

We tested the spark plugs and they were sparking. We took out the injectors but left them plugged in and put a piece of cardboard under them. We cranked the car and all 4 were spraying equally. We tested for compression on a COLD engine and we got 150 across the board. Then i tried replacing the 3rd injector again with the spare one i had. We started the car and it started working on 4 cylinders again. After about 2 minutes, i heard the 3rd cylinder stop working

We thought that the car only runs right when its cold and then when its warm something heats up, possibly expands and gets stuck somewhere. So we waited a day to let the car cool down. The next morning I started her up and the car is still running on 3 cylinders. disproving our heating up and messing up theory.

It seems that every time i fiddle with the injectors (replace them, swap them, take them out put them in) that the engine starts working on 4 cylinders again but only for a very short period.

Today I am going to try to do a compression test after the car has warmed up to see if that 3rd cylinder still has compression. The thing that wierds me out is that the first time when i swapped the 3rd cylinder injector with the 4th cylinder injector, the 3rd STARTED working and the 4th STOPPED. At this point i have no clue whats wrong. possibly some kind of sensor might be going haywire. What do you guys think?

Parts in the car now:Walbro 255lph fuel pumpRX-7 550cc high-imp top feed injectorsZIF socketed ECU with S13FX's tunen60 MAFTurbosmart wastegateBOVApexi SAFCWideband

edit: Wideband gives a reading of 14.6-14.7

[DammitBobby]

Is your setup low impedence or high impedence? If you are using a resistor pack I would start checking things with a volt meter. What is the impedence of the bad injectors compared to the working injectors?

[S13FX]

It's not the injectors.

it's his whole Cap and Rotor assembly I keep telling him but he won't listen.

In other words GET A NEW DIZZY.

[nelson8708]

clean the injector clips and the injectors where the clips go. I had a problem where my car started to act weird and hesitiate when on the interstate after swaping fuel rails. Turns out that the injector plugs had corrosion on them and every once in a while cylinder 2 would go dead. Get the car running the wiggle the 3rd cylinder injector clip on the injector and see what happens. I would take the clips off anyway and clean them just in case. Hope this helps

[sstomek]

Is your setup low impedence or high impedence? If you are using a resistor pack I would start checking things with a volt meter. What is the impedence of the bad injectors compared to the working injectors?

high-impedance.

It's not the injectors.

it's his whole Cap and Rotor assembly I keep telling him but he won't listen.

In other words GET A NEW DIZZY.

^damn this guy has no clue wat hes talking about....hahaha j/k, ill order a new distributor assembly next time i'm in indiana. Is there a test I can do that will tell me that it is the distributor for sure?

clean the injector clips and the injectors where the clips go. I had a problem where my car started to act weird and hesitiate when on the interstate after swaping fuel rails. Turns out that the injector plugs had corrosion on them and every once in a while cylinder 2 would go dead. Get the car running the wiggle the 3rd cylinder injector clip on the injector and see what happens. I would take the clips off anyway and clean them just in case. Hope this helps

I already replaced the injector clips. I also took all of the injectors out while they were still hooked up and cranked the car. All of them sprayed evenly.

[S13FX]

Tom I just called you and left you a message and told you exactly what it is.

ALex in his shop has a sohc right now with the exact same problem. It was a crank angle sensor which is build into the Dist.

Thank you, Have a nice day.

[sstomek]

Tom I just called you and left you a message and told you exactly what it is.

ALex in his shop has a sohc right now with the exact same problem. It was a crank angle sensor which is build into the Dist.

Thank you, Have a nice day.

well i sure hope you are right this time because Nissan asked for $463 for a distributor

[wild_maxx]

buy a used one

[sstomek]

buy a used one

yea looks like i'm gonna go that route.

as they say in the tuning/modding world, you can only pick two of the following:

fast, cheap, reliable

-Tomek

[Razi]

Hehe, I hope your engine feels better.

P.S. Do you have a bigger/original version of the picture used in your sig? It's sexy.

[sstomek]

Hehe, I hope your engine feels better.

P.S. Do you have a bigger/original version of the picture used in your sig? It's sexy.

I don't have the original but im pretty sure that i got it from deviantart.com

-Tomek