Drivers side...2 Rich + 2 Lean Cylinders???

[zidane45]

my drivers side has the front and rear cylinders getting way too much fuel and then the middle two are not getting enough. The plugs however on the passenger look awesome. I was wondering if anyone has ever ran into this problem. I was wondering if it may have to do with computer or wiring for the efi harness.
Thanks,

 

[795.0pacecar]

My car has been doing something similar, cylinders 5 and 7 are alittle rich and cylinders 1 and 3 are alittle lean. I too would like alittle insight into this problem.

 

[zidane45]

Yeah. I'm going to double check all my wiring for the efi. and put new plugs in it for now. ticks me off cause the engines only been in a week.

 

[795.0pacecar]

I regapped my plugs, and fixed my egr problem, so we'll see if that has any effect.

 

[90mustangGT]

Well, that could be a few things. How old are the plugs/wires/cap? It could be dirty injectors, it could be a blown head gasket. Hard to say just by that low of a symptom list.

 

[zidane45]

well i did a compression test and everything looked great there. Its just when I accelerate I get a lot of smoke. The wires aren't old and the cap and rotor look good. is there something in the distributor that could cause a problem like this?

 

[FORCED2DV8]

What kind of smoke, is it fuel or oil or water/antifreeze. Like was said before, injectors, Even if the cap and rotor look good they can be faulty, test your wires with a ohm meter, check the resistance. Even if they are new.

 

[zidane45]

Alright. Hey I'm from the big GR. Well actually byron center. small world.
It smells like fuel. the two bad plugs were all wet when i took them out and pretty black with small little deposits.

 

[FORCED2DV8]

Looks like you moved to some better weather It sounds like those plugs are not firing, try changing those plugs and testing those specific wires..maybe swap it if you have any extra..

 

[zidane45]

I broke one of the wires when i took it off so i swapped that with some extras that i have.
It still doesn't make sense why the others would run so lean though. Thats why i'm thinking that it has something to do with fuel delivery or a contributing factor. Like those injectors are starving the fuel from the other two.

 

[zidane45]

I checked the wiring with a noid tester and it seems to be working properly. Could it be something ignition?

 

[fidstang]

What intake do you have? Stock type intakes suffer from the front and rear runners starving for air(rich cond.). Which could cause the middle two to run lean if the tuning is just on the boarder line. As for the other bank being fine and the problem seems related to one side, check the injectors and harness.

 

[zidane45]

yea. its stock. thats the thing that gets me. why its just doing it on the one side.

 

[zidane45]

yea. its stock. thats the thing that gets me. why its just doing it on the one side.

 

[fidstang]

I do believe that the stock intake front runner runs to cylinder 1 and the rear runner runs to cylinder 5. Which is on the passenger side of the car. This is a known problem for the stock and stock type intakes. I would suggest a switch to intake that doesn't suffer from this design issue and will allow the air flow to all cylinders evenly.

 

[fidstang]

I do believe that the stock intake front runner runs to cylinder 1 and the rear runner runs to cylinder 5. Which is on the passenger side of the car. This is a known problem for the stock and stock type intakes. I would suggest a switch to intake that doesn't suffer from this design issue and will allow the air flow to all cylinders evenly.

Excuse me, I meant cylinder 4 not 5.

 

[fidstang]

I take that back I just remembered that the front intake runner goes to cylinder 1 but the rear intake runner goees to cylinder 8 not 4. My bad! I would still look at the injectors on those cylinders. How far off are they?