Parked and turned off the car last week no codes. Started car this week it ran for about 5 secounds and the service engine light came on and quite. Checked the code it was code 41 " cyl select error - faulty Mem Cal. Checked the bin it was all zeros. Reburnt bin on to same chip. Started the car, same thing but this time it kept running but very poorly. I pull the chip and this time the bin was all there and verified with the original.
I though it may be a lose conection but I a'm using a zif in the car and the prom was not touched before staring this week or between checking the bin (when it was empty) and downloading the bin on the burner.
I have ran several different prom IDs with no problems before. Where does the ecm generate that the mem-cal is in error?
Does the engine run on the resistor pack when code 41 is present?
I am using a Atmel At29c256 chip, is there a chance that the chip is faulty?

 

Edit

 

Are u using an adapter board ? Did u solder the memcal?

What exactly is your setup? Did u try just putting the stock memcal back in to see what happens?

Do u have all the adapters/and/or chips installed the correct direction?

Proper memcal for the app?

Try using another chip and making sure if your cyl select is where it is suppoed to be in your editor.

later
Jeremy

 

I don't believe it is a bad conection or a bin problem. Tonight I started the car after disconection of battery, got code 41 shortly after start up, drove for a bit and the service light whent out. Hooked up tuner pro emulated got it again shortly after start up went away when I drove. I have a terrible miss witch I beleive is a fouled plug from idling to long rich. Right now it blows black until cloosed loop. Tomorrow with new plugs and a good drive to set the blm in the cells I will see if it goes away.
Excessively rich mixture may be telling the ecm that has the wrong prom? Maybe.
Will post tomorrow.

 

Do u have a stock 350 SD memcal to slap in there?

Nothing major listed in your sig that would cause all the issues that you are talking about. (the code 41 wrong memecal will put u in limphome mode and make it pig rich)

Stock heads and cam , that thing should run okay on a stock factory setup tune.

Keep us updated

later
Jeremy

 

Just read your reply and you are sending me in the right direction, The problem is intermitted, it was a pain but I got it narrowed down.
First thing I tryed today was start with the modified super bin that I have been using. Yes pig rich with code. Then I pluged in 33# into the injector constant code went away ran poorly then went for a drive. It went from poor to lean at times. So I went back to my stock mem cal (if I wasn't so knew at this I would of try this before). Well it ran good again > loose conection, close but not it.
I am running a Moates switching adapter and zif in straight threw mode no stacking with a AM29c256. It has never ran right since I put this in. I check jumpers and postion of the chip several times all is good, even followed the tracing on the board to make sure the chip was in the right spot all is good and verifies with the moates instructions and pictures.
I put it back in the car snuggly the car runs good most of the time, I can wiggle it tug on the emulator cable, (or with chip in ZIF) move the ecm around no change, but after driving or even idling it will have a blip wich will flash check engine almost stall then it runs smooth again. When this problem is there it runs worse then when I remove the chip and runing off the resistor pack.
I hate to blame electronics for problems because from my experence they are rarly to blame (unless they get wet).
I think it may be the g3 switching adapter to blame. I know I am in straight threw mode but it must be somthing on the adapter board doing this.
I am going to post on the moates site to look at this and see what Craig thinks.

 

I wouldnt be so quick to dismiss the possibility of an electrical problem. Like you, i have a retro fitted sd tpi system in a 64 nova. During the initial shake down i had a low voltage supply to the ecm that screwed up the idle. Just last week during a test drive i hit the horn and the engine stumbled and the check engine light flashed. Turns out the horn relay is pulling voltage from the main power supply before it gets to the rest of the car.

 

There is 200miles short of 30,000 miles on this setup in the this car. All started when I installed the g3. It runs fine with the stock memcal.

 

Could be, anything's possible. Have you tried bypassing the ZIF socket and going straight into the adapter board? I'm certainly more than willing to take a good look at it if you want to send it in, I can send you a new one or whatever you need.

 

Thanks for the reply and your helpful suggestion.
Yes it was the ZIF not the board. I put over 50 miles on today without a hiccup. There I went again blaming electronics, and it turned out to be a simple mechanical device. Looking at it I don't know how it could have such at intermittive conection, but it difinitly is it.
I am going to order a new one tonight because I would like one to emulate and finish off my tunning.
Thanks for the help and by the your products are excellent. With the help of Tuner Pro Rt and the people that did all that hac stuff and made the definition files I have saved alot of money. I was one step off buying Accel DFI version 7 until I stumbled across your web site.

 

I just wanted you to know that this post is gonna help me out more than you know.

I'm fighting the same EXACT thing with my vette right now. Everything is exactly the way that you are describing. This is why these web forums are so great.

Thank You,

D Moss

btw....hey Craig, this is the problem that I tried to describe to you in the e-mail that I sent you last night.