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Gumba11's Avatar
 
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Wow, makes me glad I got Spectre. Im surprised to be hearing this about Electramotive. If you guys ever want to look into a new ECM you might look at the Spectre eMS-pro. Feature packed and bullet proof.

I plan on keeping updates posted once my system is done, but so far I have heard nothing but positive feedback on the Spectre forum from users.

Just my .02...........................................Chri s
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77 930 "P Zilla" 3.2 Litre w / EFI conversion

Last edited by Gumba11; 06-16-2007 at 05:26 PM..
Old 06-16-2007, 05:24 PM
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Dean,
What sensor did you use? I just replaced mine last week. It left me stranded 50 miles from home. I had to tow it to the shop and have them figure out what the problem was. Clewett (who I really like) claims it must have been installation that caused it.

Les and Dean,
How is yours running now? (if it is good) How long has it been running well? Do you trust it now? Would you drive across country and depend on it?

I am considering swapping my ecu for another brand. Expensive, but if I can't depend on the car I won't keep it.
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Crashed: Silver 1992 Turbo S2
Sold: '86 930 minor mods; '94 3.6 Turbo; '85 Euro 930 (3.2 Intake, Tec3r EFI, TwinPlug, Garrett Turbo, JE 8.1 Pistons, 505 rwhp)
Old 06-17-2007, 09:58 AM
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I used a sensor that looked like a flat bullet. It came in either 1/2" or 3/8" dia. I used it with a Clewett holder. I also really like Clewett. But I don't like electromotive. Those crank sensor left me stranded 3 times and now my dog hates my car cause of the severe backfiring that the bad crank sensor caused.

I have about 3k miles on the Ford sensor. I do trust it. I have never heard of one failing. But I don't get out much. I suppose it is possible.

If I were you I would at least dump the crank sensor.
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911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno,
Old 06-17-2007, 02:50 PM
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Quote:
Originally posted by dean
I used a sensor that looked like a flat bullet. It came in either 1/2" or 3/8" dia. I used it with a Clewett holder. I also really like Clewett. But I don't like electromotive. Those crank sensor left me stranded 3 times and now my dog hates my car cause of the severe backfiring that the bad crank sensor caused.

I have about 3k miles on the Ford sensor. I do trust it. I have never heard of one failing. But I don't get out much. I suppose it is possible.

If I were you I would at least dump the crank sensor.
Geez, I hate to hear I might be having future issues with my Crank sensor. Electromotive I would not recomend to anyone as others have stated here. I don't have enough time on mine to have crank sensor problems yet, I think? What were the symptoms of a failing sensor? It seems to me if the sensor failed the car wouldn't run at all, but I suppose an intermittent failure would be a real mess to troubleshoot.

Les
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Old 06-17-2007, 03:09 PM
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2 times the symtoms were the car would barely run and backfire really bad. The first time it happened the motor just quit. I called the towing co. and it started up. That time it was hard to diagnose cause it was intermitent. I checked everything twice including the cranksensor.

Again if it were me, I would replace it with a Ford unit if your ECU will work with one. The Ford sensor is even cheaper than the ****ty (that was *****ty) one. It is also cheaper that a tow or imagine if it fails in front of a loaded semi.

edited to defeat the censors
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911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno,
Old 06-17-2007, 05:47 PM
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Mine was running fine and then suddenly started backfiring. I stopped to look things over and it would not restart. So, from the symptom of backfiring, I had no useful warning that would have let me fix the problem before it required a tow.

Here is the strage part. For months I had been smelling a strong fuel vapor smell when I entered the garage after the car had been sitting all night closed up. I had been trying to track down a fuel leak and could not find one. Then this happens and we swap the crank sensor. Now my fuel smell is 90% gone. Very strange.
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Crashed: Silver 1992 Turbo S2
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Old 06-17-2007, 06:08 PM
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Maybe we should start our own Tec3r thread and give this one back.
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Crashed: Silver 1992 Turbo S2
Sold: '86 930 minor mods; '94 3.6 Turbo; '85 Euro 930 (3.2 Intake, Tec3r EFI, TwinPlug, Garrett Turbo, JE 8.1 Pistons, 505 rwhp)
Old 06-17-2007, 06:12 PM
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Quote:
Originally posted by DRV2FST
Maybe we should start our own Tec3r thread and give this one back.
Heh,
Sorry, just runnin' after the Rabbit here!! Basically your car runs like your distributor is a tooth or so off. If it runs at all!

Les
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Old 06-17-2007, 07:15 PM
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I started this thread but Im done so feel free to keep posting here as I am following all the EFI stuff. Im starting to be even more glad my first choice for a crank sensor was Motorcraft!

If this thread moves I will follow it. Good info here!

Thanks.......................................Chris
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 06-18-2007, 01:11 AM
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Thanks Gumba11.

So now more questions:

Do you guys use the AFR closed loop features of the Tec3r? My tuner did not trust it so he did not activate it.

Do you trust the othe safety features? Overboost? Rev-limiter?
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Crashed: Silver 1992 Turbo S2
Sold: '86 930 minor mods; '94 3.6 Turbo; '85 Euro 930 (3.2 Intake, Tec3r EFI, TwinPlug, Garrett Turbo, JE 8.1 Pistons, 505 rwhp)
Old 06-18-2007, 06:15 AM
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It's not completely the crank sensor's fault on the Clewett/electromotive set up. Its actually a combination of two things. I bet each one of you who had the problem used BOTH the crank sensor and 60-1 crank trigger wheel. The sensor has a narrow band of operation. The trigger wheel is narrow, and it wobbles slightly under certain conditions. When this happens, the ECU looses it's place (can't find the missing 2 teeth) in the cycle and shuts down. You can fix this by using a different sensor or a more robust (thicker) trigger wheel.

Having owned the TEC3r, I used the closed loop system in a very narrow window - less than 0 manifold pressure and less than 4000 rpm. In other words, easy cruise and idle. And, it really doesn't work well at idle. You can set the parameters in the software. If you are unsure how to set these parameters, do not use it.

The other features line over-boost and rev-limiter worked fine.

There are definitely better choices than the TEC3r for an air cooled, highly modified, turbo motor.
Old 06-18-2007, 05:43 PM
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Hey Don,

I don't know if you are talking to me, but my 3 sensors definitely failed. No question about it.

I am running a 36-1 wheel that I mounted myself.

I have also found the closed loop system to not work very well on the DTA. Maybe it is the setting that I have or maybe the system sucks. So I hardly run closed loop anymore. I really don't see the need to.
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911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno,
Old 06-18-2007, 07:36 PM
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Quote:
Originally posted by dean
Hey Don,

I don't know if you are talking to me, but my 3 sensors definitely failed. No question about it.

I am running a 36-1 wheel that I mounted myself.

I have also found the closed loop system to not work very well on the DTA. Maybe it is the setting that I have or maybe the system sucks. So I hardly run closed loop anymore. I really don't see the need to.
You had a DTA ECU with Electromotive Crank Sensor?

Les
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Old 06-18-2007, 08:10 PM
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Can you guys post the part numbers of the sensor that you used (ford/motocraft)? I have the electromotive one to use with my Microtech and now I am crapping my pants......

Cheers
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Old 06-18-2007, 10:21 PM
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Les,

That is correct

Jeff,

part # for the Ford sensor is, 6859702
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911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno,
Old 06-19-2007, 04:41 AM
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Wo ist die Rennstrecke?
 
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Quote:
Originally posted by dean
Hey Don,

I don't know if you are talking to me, but my 3 sensors definitely failed. No question about it.

I am running a 36-1 wheel that I mounted myself.

I have also found the closed loop system to not work very well on the DTA. Maybe it is the setting that I have or maybe the system sucks. So I hardly run closed loop anymore. I really don't see the need to.
Hi Dean - I was making a general comment. Neil Harvey has quite a few horror stories, but from a track perspective. There were a lot of sensor failures too.

When I converted to LINK ECU, it wouldn't even recognize the electromotive sensor. Even though it cost me a day on the engine dyno (ouch), I am glad I changed the crank AND cam sensor.
Old 06-19-2007, 01:27 PM
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I'll stick with sensors from Motec for now on. They may be over priced off the shelf items from other vendors, but I don't have to worry about whether or not and for how long they will work.
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Old 06-19-2007, 02:32 PM
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Better knock on some wood David........LOL! Just kiddin!:P
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77 930 "P Zilla" 3.2 Litre w / EFI conversion
Old 06-19-2007, 03:33 PM
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Quote:
Originally posted by Gumba11
Better knock on some wood David........LOL! Just kiddin!:P
I always do
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Old 06-19-2007, 05:28 PM
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