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rattlesnakeracing
Join Date: Jan 2009
Location: Eastern North Carolina
Posts: 101
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Swapping 944 ECU's - will not start?
88 944 will not crank. Changed with new parts: plugs, wires, rotor button, distributor cap, coil, fuel cartridge, fuel relay, speed sensor, mark sensor. 12V Hot off the coil and at all plugs. The only thing I know left is the alarm module & ECU. This ECU is BOSCH 0 261 200 086 /// 944.618.121.05. I have another 87 944 with an ECU that is BOSCH 0 261 200 077 /// 944.618.121.04. Does anyone know if it is o.k. to swap these two ECU's? Going to do the alarm module bypass right now. Thanks for any help or ideas!
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02-08-2009, 01:55 PM
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rattlesnakeracing
Join Date: Jan 2009
Location: Eastern North Carolina
Posts: 101
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Bypassing the alarm system did not work. So I crossed my fingers and swapped out the ECU's. Now it starts and runs like normal. The problem is my ECU. O.k, the only way I know to troubleshoot the ECU is to heat up any cold solder joints, check for cracks, etc... If I do those tasks and it still doesn't start, I am going to swap out the chips in the ECU's and see if that makes a difference. Does anybody know where I can get schematics for the ECU's and try and find out what the difference is between the circuit boards?
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02-08-2009, 03:15 PM
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Registered
Join Date: Sep 2005
Location: Pottageville Ontario
Posts: 126
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Is the engine turning over?
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Jeff Laurence, '87 944S |
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02-08-2009, 05:52 PM
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Registered
Join Date: Sep 2005
Location: Pottageville Ontario
Posts: 126
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sorry, went back and read the whole post(duh) as to schematics, I've never seen one perhaps someone else here has seen one.
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Jeff Laurence, '87 944S |
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02-08-2009, 05:56 PM
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rattlesnakeracing
Join Date: Jan 2009
Location: Eastern North Carolina
Posts: 101
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 Pulled the boards out of the ECU. Took out the soldering gun, heated up the tip and got happy on the board with some hot new solder. Pulled the chip out and reseated it in the plug. Closed the ECU back up and plugged it back into the car. Turned the key and she started up as though there has never been any problem at all. I am disgustingly happy! 6 weeks of downtime and about $500 worth of new parts = one idiot that now knows how his ignition works. If the rest of life was this simple I don't know what I would do!
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02-08-2009, 08:06 PM
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Professional Bull5hiter
Join Date: Mar 2008
Location: Alice Springs, Australia
Posts: 8,889
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I think I saw some schematics for later dme's on FR Wilks site.
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Jeff 83 944 Guards Red 23 718 GT Silver |
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02-08-2009, 11:01 PM
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Professional Bull5hiter
Join Date: Mar 2008
Location: Alice Springs, Australia
Posts: 8,889
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PM sent.
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Jeff 83 944 Guards Red 23 718 GT Silver |
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02-08-2009, 11:07 PM
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Certified Porsche addict
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Quote:
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Tennessee Region SCCA & PCA Current projects - '87 944 Turbo, '87 924S, '82 931, '10 Boxster (the girlfriend) Past projects - '83 944, '02 Boxster (x2), '99 Boxster, '14 Cayman,'72 Opel GT, '75 280Z, '90 300ZX, '87 944S, '87 944 Turbo, '88 924S (x2), '07 Cayman S, '73 914, '88 MR2 AW11 |
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02-09-2009, 03:41 AM
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rattlesnakeracing
Join Date: Jan 2009
Location: Eastern North Carolina
Posts: 101
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Thanks Glademister, Outback & Jeff! I went to http://www.frwilk.com/ and looked at some of the info there on the web pages. Great site & WOW perfect bodies! I downloaded the schematics for the 911 and 951. I am going to get a replacement just to have for future problems. I was really surprised with my ECU. The box was clean as if it just came off the shelf. The boards looked nice, a little fading, but no damage or deterioration to any circuits. No visible corrosion. I don't know if it was just reheating the solder joints or reseating the chip that fixed the ECU. Just extremely happy that I didn't have to try and find another ECU. Cheers & Good Day, Rattlesnakeracing
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87 Charcoal Metallic 944{Proj} 88 White Pearl 944{Daily Driver} 87 Silver Mazda RX-7{210K no rbld} 87 Charcoal Mazda RX-7 GSL{Proj} 88 Gold Met RX-7{Parts} 89 Midnight Black Mazda RX-7 Conv.{Proj} 87 Intl. Scout II{Proj} 99.5 Nissan Pathfinder LE {Daily Driver} USAF (Ret) GO Blue! - - RattlesnakeRacing - Don't Tread on Me!
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02-09-2009, 09:42 AM
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Professional Bull5hiter
Join Date: Mar 2008
Location: Alice Springs, Australia
Posts: 8,889
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No wucken furries.
Mmmm.....FR Wilk's grid girls.............. Cheers
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Jeff 83 944 Guards Red 23 718 GT Silver |
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02-09-2009, 01:51 PM
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1999 Porsche Boxster
1973 Porsche 914 2.0L
1987 Porsche 924S
2014 Porsche Cayman
1982 Porsche 931
1985 Porsche 928S
