Contour Enthusiasts Group Archives Forums Modifications 3.0L Duratec ?Help tracking down the stuttering problem....Long...

Ammendium to my last post: I meant to say "does not" as opposed to "does" --- "...does not run the engine so frigging lean..." Thanks!

Ok guys, I wanted to be the first to test this equipment and then report, but since you are all interested then I will go ahead and tell all what I know now instead of waiting. Here is one link, and there is another at the bottom of the message, but read the whole post before clicking on them.

www.greddy.com

Look under the product called "eManage"

This thing is a piggy back air/fuel/timing management computer with real time data-logging and more. It is programmed with some software with your laptop and a USB port.

This thing does the same as the SAFC in its basic form, but it also has a lot more stuff.

If you get the software and use a laptop here's what you get:
16x16 airflow adjustment map
16x16 ignition timing adjustment map (with the optional harness..this is just the plug and some more wires)
16x16 Injector Duty Cycle Map (with optional harness...same thing) with the ability to control two more extra 'sub-injectors'

Plus other various goodies that are for Vtech and such.

It sounds great, and the basic unit only costs $379.00 retail with the two optional harnesses weighing in at an additional $40 each.
I hear that getting the software will be like $100 bucks, but not sure.
So for $460 you get complete programmability.

Check this out and see what you think. I ordered one already and will pick it up on friday. That is the basic unit. The software wont be available for about another week or so, so I will have to wait for that.

Here is a website with the instruction manual scanned.
scans of instruction manual

By the way, the guy I'm dealing with has already sold me the basic unit for $300.00 and will give me cost on the optional harnesses. He has ordered the software for his business and is going to let me use it to tune the beast initially. If its copyable, then I will copy it (free!! yeay!!!) and you guys know what that means.

I really think that those folks like Hightower and Terry Haines doing their turbo kits ought to take a look at this device instead of just the SAFC. With the programmability of air/ignition/injector maps, data-logging, and the optional gadgets that allow this product to work on turbo'd cars, there could be a big savings. They probably wouldn't even have to use a custom chip.

Enjoy.

warmonger

By the way, if you have fixed your engine coolant temp sensor cooler in order to verify the condition with this test, don't leave it that way while the engine is hot. It will not allow the cooling fan to come on (DANGER). I ran mine with AC on (forces the fan on) during the test as the car was already hot. It was still enough of a test to determine what has already been reported.

warmonger

Damn! Great stuff Warmonger!

Definitely want to hear your opinion on the unit once installed.

So basically for $150 more than the S-AFC, you have a bigger adjustment map and are able to advance/retard timing at will. Almost a custom chip, if you will.

Guess I better hold off on the S-AFC order...

John

Ah... But's that a misconception.

The engine pulls in the same amount air regardless of using 1 runner or both runners. (atleast at low rpm where 1 ruuner would not be a restriction)
However the velocity drops using 2 over 1.
Also the fuel atomization is affected since the injectors are located in the primary runner.
Plus the lower velocity and less airflow in the primary runner affects atomization as well.

That looks like a nice find WarMonger when adding those extra harnesses & the Dealer Software!

So who is doing the PCM pinout?

Nice find on that unit.... I cant wait to see the results of the installation. Good thing I cant buy a "tuner" like this until the summer. By then several people should have this installed and I will be able to make an educated decision on either this unit or the S-AFC...... Only thing that could stop me from getting the Greddy is the lack of a notebook computer.....


Nikolas

You can use your desktop PC, just get a long datalink cable. From the picture it looks like it is a USB cable. When I first got my OBD software I just took my PC outside and ran an extension cord to it. Besides, you shouldn't need to keep messing with it once it is tuned.

warmonger

Ok, I have a new update with my testing that will shed even more light on this stuttering issue.

I have been playing with modifying the stock MAF and I have gotten rid of the stuttering issue!

Remember that I have the bigger 24# injectors in the car before anyone jumps up to do what I am about to tell you.

First off, I have two stock mass airflow units so I decided to play around modifying one. I took the extra maf and drilled the rivets off of the backing plate that covers the sampling tube.
The sampling tube has a 90 degree downward turn in it, and the backing plate is easily removed. With a small drill bit I drilled holes in the center of the rivets. Then I took a larger bit that was sized pretty close to the rivet diameter. Then I drilled them off. With the plate removed, the sampling tube is a straight shot and no longer had the 90 degree turn.

I reset the memory on the pcm by pulling fuse #4 (3 amp) out while I was working. Then I put the maf back in the car and reinstalled the fuse.

I fired the thing up and the idle fluctuated for a few moments and then leveled out. By monitoring the fuel trim I was able to tell that it had apparently richened up the airfuel mixture.

When I did this I was hoping to increase the air velocity going through the tube. I don't know if that happened, all I know is that the stuttering was completely gone once I did this.

By drilling the rivets off, you can actually re-attach the plate if this does not work.
I reccomend that someone with a 2000 SVT that has a stuttering problem and some time to play with their car, trying this.

For myself I went ahead after this test and removed the center post entirely and polished up the casting where it was at. The sampling tube is there, but it now looks sort of like a pro-flow maf tube.
For the SVT's running 19# injectors, DON'T remove the center post entirely. With my 24# injectors in it seems to be running lean at the top end now that I have the center post fully removed. The low end feels great now, and the injectors long term fuel trim has been increased.

For me, this is just a temporary measure until Friday when I get the GReddy eManage device. Then I will attempt to tune in one of the MAF's that I have. At least now I can drive normally around town!!

Good luck to those of you who are still having this problem. I hope this information helps you out a lot.

BTW, if you do any work on the MAF, you need to remove the electronics module from it. It uses something like a T-25 torx bit that has the center hollowed out. I just used channel-lock pliers to grip the outside of them and loosen them enough to remove by hand.
If you attempt this and it does no good, make sure you have two pop rivets and a rivet gun, or the ability to thread the holes you drill out and insert screws with loc-tite on the threads.

Good Luck,

warmonger

WarMonger,

I will test your theory out on my car for sure this week/weekend when I get the time. Your other testing has proven to be accurate and our problems are the same. Anyone else who has a '99/2000 svt/reg v6 (stuttering) with an extra maf (and/or extra cash) and some mechanical ability please experiment with this as well - since if enough of us produce the same result through the same action, we can get definate proof of cause-and-effect. I'll update with my results asap.