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Re: Bad ECU
Posted by Carol in TX (more from Carol in TX) on Mon, 6 Jan 2003 09:56:26
In Reply to: Bad ECU, RS
[Profile/Gallery]
, Mon, 6 Jan 2003 08:28:12
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I think the ECU was from another 89 - pulled parts from about 6 cars. I pull the one with the same Bosch number - do you know the numbers for the newer ones you refer to? I checked continuity from the ground at the lifting point to the neg. terminal of the battery and it may need some work but I get an okay reading. Can I hot wire the fuel pump using a jumper instead of a relay next to the system relay? I think if the pump runs the car starts and runs - I am not confident that it is the pump shuting off that kill the engine though.
I have had trouble over the weekend finding 'new' relays - standard parts houses seem confused - we got a new one but it turned the pump on all the time - n/o when should have been n/c or vice versa. I gather the signal that energized relay comes from two sige plugs - is this a voltage or contact from the ECU that turns the relay on and off? Do you know which side turns it on?
I am still concerned that the ECU is losing the signal from the crank sensor (hall sensor, what ever) and this is the fault that is keeping the pump off.
posted by 66.137.123...
Posts in this Thread:
- 89 Saab 900, Carol in TX, Sun, 5 Jan 2003 23:56:34
- Re: 89 Saab 900, EdWes, Tue, 7 Jan 2003 08:17:17
- Bad ECU, RS
, Mon, 6 Jan 2003 08:28:12- Re: Bad ECU, Carol in TX, Mon, 6 Jan 2003 09:56:26 <-- Viewing This Message
- '89 was a bad year for C900 ECUs, RS
, Mon, 6 Jan 2003 12:49:43 - Re: Bad ECU, JimBlake
, Mon, 6 Jan 2003 12:05:39- Thanks for all the good info but..., Carol in Texas, Mon, 6 Jan 2003 12:54:43
- Re: Thanks for all the good info but..., JimBlake
, Mon, 6 Jan 2003 13:59:49 - Let's go back to the beginning ..., RS
, Mon, 6 Jan 2003 13:06:15- Re: Let's go back to the beginning ..., Carol in TX, Mon, 6 Jan 2003 14:14:46
- OK. Maybe ignition module, RS
, Mon, 6 Jan 2003 15:26:56- non-turbo??, JimBlake
, Mon, 6 Jan 2003 15:44:25 - PS, RS
, Mon, 6 Jan 2003 15:29:53- Re: PS, Carol in TX, Tue, 7 Jan 2003 00:35:02
- Re: PS, Carol in TX, Mon, 6 Jan 2003 20:52:56
- Re: PS, Carol in TX, Mon, 6 Jan 2003 16:20:03
- Where in TX? n/m, Dave D, Mon, 6 Jan 2003 01:05:46
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