Hi Josh,

OK, i understand. A constant signal is definitely wrong. So you you have to check if it is the right sensor and if sensor and camshaft flywheel fit togeher. If there is an offset, or if the sensor isn't working correct itself. No wonder that you get missfire, because the ecu doesn't know the cam position, which also means she doesn't know where the 1 piston is and that means the ignition is firing at wrong timing. You need to get a clean square wave signal from the camshaft sensor.

Regards
Markus

 

Markus,

The constant signal is coming from ECU... Not the sensor. It is the correct sensor for M113 engines and M113 camshaft gear. Nothing is wrong with the sensor. It is harness short or ECU problem. Which is why we are thinking fried resistor to pull voltage from 4.96V to <1V. That way the sensor voltage can overcome the ECU's signal.

ECU is firing correctly because Crank sensor is correct and working. TDC cylinder 1 is determined by crankshaft position sensor which is functioning perfect.

Look at "Service Manual, 9 - 348 , Diagnostics check 3"

 

Hi Josh,

i think we talk past each other. Camshaft and Crankshaft Position Sensor work together. You can't generate the position of the 1 cylinder from the Crankshaft Position Sensor, because you have 4 strokes and 8 cylinders.

I'm not talking about the signal that is sent by the ECU to the Camshaft Position Sensor. I talk about the signal that the ECU gets back from the Camshaft Position Sensor. This has to be a clean square wave signal on the oscilloscope.

Regards
Markus

 

Markus,

Understand you .

I did find the Crank sensor wires were against the O2 sensor . So I re-wired them. I also found the 40 AMP fuse on the relay control module popped! . So I replaced it. All said and done, it drove worse with the cam sensor plugged in . I briefly checked the ECU to no avail.

 

As soon as I can, I will check with oscilliscope. Hopefully within the next couple days. If we can get 3 channel, I will check: CAM, Crank, and Plug wire for cylinder 1.

Interesting research scanning the web. A lot of people are saying on motor swaps, flywheel/flexplate swaps, or cam swaps that the cam and crank sensor must go through a re-sync process with the diagnostic tool for that cars manufacturing company. So Star DAS. Mine should be here any day now, it was sent the 23rd of september.

 

More progress.

Took known good V6 ECU from another person's car. Plugged it in. All tested values matched mine. So the problem is not in the ECU. It is looking more and more like a syncronization issue. Time for my Dad's O-scope.

 

Put the car in for serious troubleshooting mode. With an O-scope checked cam signal, cam to crank signals, crank to cylinder 1 fuel triggered by cam, crank to cylinder 1 coil cam triggered, cam to fuel cylinder 1 crank triggered, to spark... Checked fuel and spark from cylinders 7 and 8, and compared those to 1...

Everything looked perfect. It seems like a syncronization thing between crank and cam signals. WIS manuals say if you replace crank or cam to run default initialization and reset adaptations in DAS. Mine should be coming any day now so hopefully something happens soon.

On another note I tried building another ECU for my car... Newer firmware is giving me a run for my money. I would have figured that all of the crossfires run on the same firmware... Nope, not even close. Because of my assumption I have to risk the motherboard, but as long as I don't lift pads or damage anything I have correct firmware files to change and run. Should be more soon.

 

Crazy weekend. Where to start...

I finally had serious time to pump out ECU work for others. I was successful in making a second NA V8 ECU!!!! This has not been done worldwide
This means that there will be 2 alabaster NA V8's!!! JimmySkullz will be up and running very soon!

The other ECU job I have currently is still in hush hush mode because of some difficulties with correct parts being shipped. It's all worked out and should be revealed soon.

Now testing the 2nd V8 ECU I made was interesting and scared the crap out of me... I wen't on a short drive, pulled into a gas station to buy a beer and the car died on the way in. It had CPS written alllllll over it, but all I changed was the ECU. I walked home and grabbed the V8's CPS and my other ECU. Still didn't start. Smelled fuel but no tach jump on cranks. Now rather than troubleshoot in front of a run down gas station next to an outdoor bar and grill I had two friends help me push it home... For 3K lbs this car will kill you pushing 1/2 mile lol. 2005 Ragtop had just got his new CPS in and was going to have a shop install it. I said if I install it can I have his old one. He agreed. So swapped his, swapped mine... First things first, the V6 CPS I had said "ab" with a Mercedes part number...??? The V8 CPS had nothing written on it anywhere. I thought for sure this was the problem. As I was walking to the car to install it, I dropped it (facepalm)... Picked it up, installed it, no start. Then I realized that there was some melted plastic on the valve cover between cylinders 6 and 7.... hmmmm. Pulled the coil for cylinder 7 and sure enough, it shorted and melted for plug B. Replaced it, still no start. Took a break since I had no hair left at this point and thought.... With a short that bad there must be a fuse. Popped open the drivers side fuse box, replaced the 15 amp fuse and she roared to life... (facepalm).

Moral of the story. If you think it's the CPS and the car still doesn't start after you replace it, try looking for a shorted coil and replace the fuse.

Cam - Crank sensors are still goofed up. Switching ECU's did nothing. Still thinking the variant coding is all messed up in star DAS Developer.

 

Here is an exhaust comparison.


Star DAS has still not shown up but we will see what happens when it gets here. Rotor adaptation is required if you: change flywheels, crank sensor, motors, unplug the battery, motor mounts or ECU lol. I may have done all of the above. So she is for sure in need of adaption. The sooner it happens the better. My welder is ready to start work on headers, true dual with an x-pipe and we will offer systems for the V6 guys as well. The only difference is the front port that I have. More info to come on that but as it stands were thinking the first NA V6 system, and SRT system will be sold very cheaply for the buyer to dyno before and after. I'm about 15 hours or so into research on primary size vs length vs collector for what type of power were looking for. So far I am leaning towards torque at the 4K RPM range. Thats the center of the calcs but I'm sure it will be tossed and changed as we go.

 

No Star DAS yet, so I ordered a chinese HDD that will fit right in to my IBM with the newest version and developer. If it comes this week expect the full 100% completion this weekend with a video.

Also expect the other Alabaster 5.0 6-speed completion update soon I won't spoil much other than a custom ECU was actually confirmed, completed for another xfire. It is now proven IMO since there is not one person that has been able to make 2 work off the key for NA V8's.

Annndddd another completion, but it's not a V8

I'll probably start a "living with the 5.0 6-speed" thread next week since it's been running for almost 2 months now.

I'm also waiting on K&N filters and SS tubing for the intake, once that is on and everything is ready it'll be time for the drag strip. Organizations at willow are saying it's only $15 for the day :O Video and slips to come when I make it out. I'm shooting for November 30th for that since they are only doing them about once a month.

 

not sure what you mean, if you are referring to ecu, , I do have two of them for the same car(my V8 by Rudy) and both keys works with both ecu's.
One ecu by Rudy
one ecu by JS Benz,
I can swap them any time i want, one is 90% time used,, the other is when going on long trip,,,the trip one gets me 26mpg ,the other one gets me 11 mpg. and 10.85 @ 129 in the 1/4

 

Your car is supercharged, not Naturally Aspirated .

Rudy want's to pick my brain because of the issues with the NA V8 ECU's, I may turn around and pick his brain for the possibility of a newer amg motor tied into our cars . He knows a lot more than me in a lot of areas and I really wan't a 63!

Also, for those still wondering, or that missed it along the way,
The problem with my swap was because of the unknown. No one could make the non-AMG to manual trans work because every V8 Merc has an auto. Finally someone had the cash to step up to Mercedes and have them do it, and it still took 3 weeks to a month for them to figure it out . The non-AMG ECU's do not have the potential for the older style key, cruise control, or clutch/elimination of TCU, all required for R170's. The AMG ECU's do, as proven with the 55K swaps and testing I have done with a 32 amg and an SRT ECU. But the key and cruise is coding in Star DAS Developer once unlocked. It's still a PITA and I would have a lot of playing around to do with the 55K's, but it does not require removal of multiple EEproms, creating data, changing data, matching software, swapping components, and, and, and... Lets put it this way. I have built 3 NA V8 ECU's. I consider myself pretty efficient at it, and it still takes me around 14 hours start to finish to build one. It is a completely custom ECU, yet everything see's what it needs to work completely factory.

 

SHE . . . . . IS . . . . . . . . . FINISHED!!!!

Finally got star DAS, and was able to run default initialization. I didn't think it would work but I drove a good 4 miles with no CEL, and it was soooo much smoother than with the cam sensor unplugged. Night and Day difference. Amazing to say the least.

Just a re-cap, This means 2 NA V8 Alabaster 6-speeds are roaming the US roads!!!!!

Hopefully Jim will chime in with a review of his new beast.

 

Congratulations on getting it finished. That's something to be proud of.

 

You get a standing ovation from me. Something I would not attempt 3 years ago, you have figured it out and in a timely fashion.

So which meets are you attending next year? I will put it on my "to be at" list.

 

Congrats!!!!!!

 

Congrats man. A+ for perservance!

 

Quite a feat...congratulations...can't wait to see it someday...and hear it...although we have ridden in the beast of FL......sooooo.....lol

 

Thanks!

Thanks man, and unfortunately I'm so far away from everyone it's hard to get over that way for meets. However my wife and I are still trying to get us and the kids to start heading east. Were thinking Indiana.

Thanks!!

Thanks!!

Thanks Doc, and yeah, shes gnarly but no where near that gnarly lol. Getting the motor shipped to my garage for $510 was the deciding factor for this though and I know it was never meant to be a hardcore racer in any way. If I free up the exhaust then she will be about as peppy as I'll be able to get her really. I'm just looking to make it work reliably... Spec clutch, wavetrac, maybe a new flywheel, upgraded brakes, we'll see what she needs as I put miles on her. But, if I can get some swaps for people under my belt then we'll all be looking at the 55K 6-speed. Just need to save up for the motor really. I'm slowly going to be collecting the HE, brackets and lines and all that so someday. For right now I am really diggin the GT crossfire I just completed, and WOT at 2700 RPM (peak torque) in second is just awesome lol. Everyone I do it with gets pretty scared, my friend went from smiling to grabbing the seat and the door lol.

 

It's got to be a wild ride with a 6 speed. I tip my hat, my shoes, my wallet ….. no not the wallet. It just shows us all what can be done when NO isn't an option.

Les