I have tried EVERYTHING i can think of with my car, heres what it is doing.


the 4 cylinders that are under control of the passenger side injector will not stay running if i unplug the drivers side injector

however if i do the opposite, the drivers side will keep it running fine.

All 4 on that side are firing but for some reason they wont stay running on their own and its hampering my normal driving performance greatly and even causing pinging.

I have no clue what to do next !

btw, i have 350 swap with the 350 tbi and it had been running good at one point but now im baffled...


ps. my a/f gauge shows those cylinders as running lean

 

Ok im confuised.

Are you saying that your car isn't running right, and unplugging the drivers side injector makes no difference in how it runs?

I would normally say check the plugs and wires.

But you say your picking up a lean reading on that side. Fire it up, look in the TBI and see if the injector is working.
If it's not, or isn't putting out as much fuel as the other side, go to a bone yard and pick up a used tbi. grab an injector put it in and see if that takes care of your porblem.

 

The problem may be an injector or may be the ECM. The ECM drives each injector with separate circuits.

So, in order to discover whether it is the inj or the ECM. . . switch the injector connectors between the two injectors. Then do the same test as you did before.

If the results switch between sides, then it is the ECM. If no difference between sides, then an injector is suspect.

Be sure to ccheck that the injector wires at the TB haven't been crimped by the air cleaner mounting ring.

RBob.

 

I tried switching the wires around and even the injectors... the problem stays on that side no matter what.

Is there anything else that would be hampering just those 4?


I even changed tbi's btw

 

Check your fuse for that side injector maybe its blown!!!

 

like i said i switched the wires that control that injectors and i had the same problem ... meaning i took the plug from the drivers side injector and plugged it in the bad side.

 

surprisongly one injector gets more voltage then the other one, i wired my injectors wrong on my holley tbi and i blew the fuse the red power wire is the main source,my passenger injector is not running full 12 volt power.........run a voltage test on the wires!

 

so what voltage should i be getting at either one?

 

Have you put a noid light on the faulty side? Your ECM may not be pulsing the injector, or the pulse may be very weak.

 

I didnt do that but i plugged the good sides harness onto the bad side injector and it does nothing... both injectors seem to be spraying the same...


There has to be something else that is affecting 2 or more cylinders just enough to make them not idle....

Even when i have the good injector running 4 cylinders i can remove a plug wire and it will stay running on 3!

I dont get it...

 

Now I am confused, you took the good side of the harness and switched sides and the injector still don't pulse? Or are both injectors pulsing and your gettin a miss on a few cyl. Sorry about the confusin. I know on my bird I can move the wires from one side to the other and I get no change at all.

Answer theses questions for me

1. Are both injectors working?
2. If so, do both injectors look like the fuel spray is equal?

If both of thoes are yes, I would look at the following things,
1. Vaccume Leaks
2. Fuel pressure, and check the fuel filter.
3. Fire going to the bad cyl.
4. Compression Test, On all cyl. making sure each one is with in 10psi of the other, All though it only takes 90psi to make one hit.
5. If compression is ok check to make sure you don't have a flat lobe on the cam. Or a collapsed lifter.

Here again I am kinda confused on your problem, but there is not much else that will cause a miss, If I am way off here I am sorry. Let me know.

 

I think you have the right idea, im pretty sure 2 or more of those cylinders are not firing right for some reason, at least one of them has to be on the drivers side because the miss is showing up on my a/f gauge as a wild fluctuation as at least two of the cylinders on that side are running correctly and the other two possibly lean or just missing altogether.


The weird thing is when i remove any one plug wire on the affected cylinders it is a full noticeable miss.