If we assume the problem is the tach signal.. - Saab 900 Bulletin Board - Saabnet.com
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If we assume the problem is the tach signal..
Posted by Mr. Science (more from Mr. Science) on Thu, 30 May 2002 14:57:40
In Reply to: Car Won't Start, Mr. Science, Wed, 29 May 2002 15:51:35
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..granted, we can't be certain at this point, but I feel good about the gamble.... several options.
(1) ECU and/or fuel pump relay are malfunctioning. They receive the tach signal, but don't interpret it correctly, and thus don't turn on fuel pump. Bad ECU or FPR, right?
(2) The tach signal isn't getting to the ECU to start with. This is my hunch.
Now, if #2 is the case, what would keep the tach signal from getting to the ECU?
'Roo
posted by 128.42.176...
Posts in this Thread:
- Car Won't Start, Mr. Science, Wed, 29 May 2002 15:51:35
- Intermittent starting problem -- starter just buzzes, Eric Zimmerman, Mon, 9 Sep 2002 12:06:54
- Re-check Vacuum Hoses, JonG, Fri, 31 May 2002 14:23:21
- Running out of juice...please help, Mr. Science, Fri, 31 May 2002 00:17:01
- If we assume the problem is the tach signal.., Mr. Science, Thu, 30 May 2002 14:57:40 <-- Viewing This Message
- Update - Got Spark, Got Fuel Pump, still no start, Mr. Science, Wed, 29 May 2002 21:50:50
- More info - fuel pump not pumping while starter cranks, Mr. Science, Wed, 29 May 2002 23:37:32
- jumper the pump & see if it starts, JimBlake
, Thu, 30 May 2002 12:11:56- Re: jumper the pump & see if it starts...yup, JohnK, Thu, 30 May 2002 12:57:58
- ECU, JJ, Thu, 30 May 2002 14:28:36
- If there's fuel in the rail, it starts..momentarily, Mr. Science, Thu, 30 May 2002 14:24:48
- carpet, JJ, Thu, 30 May 2002 14:44:08
- Re: Car Won't Start, burlyb, Wed, 29 May 2002 16:37:32
- Re: Car Won't Start, steven, Wed, 29 May 2002 16:16:19
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