I went in to get some stuff for the max.
All weather matts and stuff like that.
Well he asked me where did my 2000 maxima go. I told him that I got tired of all the freakin issues with the tranny and the paint chips and what not and I traded. He told me that the autoamtic maximas have nothing to fear now. Nissan will now upgrade your ECU for a price. Supposidly when you floor it in an A/T maxima you loose 3 cylinders. When you go faster the cylinders start to kick in one by one. And that's how it gains its top end. The new ECU program will let those 3 cylinders stay active.
Anyone wanna call this 20$?

I don't know maybe...
we'll just have to see

 

so a 3 cylinder max that doesn't behave like a yugo?

 

That just sounds plane weird... did he have any documentation to back this up?

 

I am not a mechanic, but I definitely do not believe this.

 

well like MaineI30 ... I am not a mechanic, but I don't believe it either.

Reason:

The rods that are connected to the pistons are connected to only 1 crankshaft. That is what controls the order of cylinder firing. (not really, but for our case ... just go along) Now the ecu can't control the crankshaft's connection to the rods/pistons. Now camshafts can be controlled by the ecu, but there is no physical way that the ecu can control the 3 cyliders to where they aren't moving. Now that means in order for this to be true (what the service guy told you) then the ecu must control fuel to the cylinders that are firing. That means that if 3 are firing and 3 are not that the ones that are not firing are running with no fuel/anything in them. Now once again, I'm not a mechanic, but that can't be good. Also, if I remember correctly not all cyliders fire at the same time. I mean its like 1 and 4 fire at the same time 2 and 5 etc.

To make a long story short ... it is possible for an ecu to cut off fuel to 3 cyliders so they don't fire, but it is not very probable. I mean that essentially creates a Lean mixture, which we all know is bad. One thing that makes the engine go is the combustion of the the other cylinders to keep the crankshaft spining.

If its somehow true ... I know that I will be in line to pay to have it corrected.

 

did you notice a bunch of open beverage containers laying around? He was drunk!

Now... if you are talking about flooring your car and going into safe mode or hitting the ignition interupter, then sure..

 

 

Whuuut?

 

It is very possible to run a car on less than the total number of cylinders. Cadilac had this 20 years ago, and numerous manufacturers are doing this now. All you have to do is shut off the fuel and spark to the cylinder, and the engine will still function normally. Has Nissan done this to their engines yet? No. Can they? Yes.

 

yeap..and Mercedes-Benz S600 also has that function, called Active Cylinder Control.

 

The Cadillac ones were horribly unreliable...good idea but poorly executed.

 

That was because it was a mechanical and rudimentary computer controlled system, now its all computer controlled.

 

 

GC








[QUOTE]Originally posted by UMD_MaxSE
[/QUOTE

 

 

I believe him!




Give me $20 and I'll tell you how to do it.

 

Give me 15 and I'll do it

 

fi dolla?

 

I have a monopoly on this info, so I'm the one who sets the price!



Definitely ask for documentation when you get a chance to talk to him again.

 

if only three were firing, don;t you think we would get better MPG than the 20 we get now...? I'm not mechanic, just thinking...

 

maybe it has something to do with that little mouse in there. i bet he gets tired

 

Mexicans man, no wait....Maxicans. Our cars are all powered by Maxicans.

 

I called him after class today and he was on lunch.
I'll try back after lunch.
BTW he had a pretty sweet modded 2k maxima
Auto though