Thanks for your reponses guys. I fixed it this evening. I still don’t know
EXACTLY what caused the problem, but I went ahead and bought a new cap and
rotor and came home to troubleshoot. Spark from main, and also at the
plugs, so it wasn’t ignition (although for the life of me I couldn’t imagine
why the tach quit). Checked that all grounds were solid, volt meter showed
proper voltage at all points between dist and Hall sensor and ICU.
Continuity and resistance also checked in spec. Still no start. Plug on
dist where Hall effect doo hickey (technical term) plugs in was
deteriorating, so I unplugged it and soldered new leads on it, plugged it
back in, checked for continuity, and siliconed my new wiring job for water
fastness. Still no start, so I started thinking fuel (good call, Danny).
Shot a couple of squirts of ether in the intake, fired right up, then died
when ether was used up. Before I siphoned 12 gallons of gas out and
replaced the pump, I checked vacuum lines on intake and to the FPR – guess
what, one was cracked BAAADDD. Replaced it, still no start, so I went to
the fuses, everything LOOKED okay, but I replaced the fuel pump fuse anyway,
praying that if it wasn’t that, it was at least the pump and not the relay.
Voila, car started fine, ran for 5 minutes, and I took it for a spin around
the block. AND the tach worked. Must have been a combo fuel pump fuse /
Hall effect sensor connection problem. Here’s hoping it starts tomorrow
morning so I can catch my 5:55 am plane to Omaha! Thanks for the
suggestions!
Chip
85 900 T 16V
173K miles
- Hide quoted text — Show quoted text -
Chip Thompson wrote:
> Thanks for your reponses guys. I fixed it this evening. I still don’t know
> EXACTLY what caused the problem, but I went ahead and bought a new cap and
> rotor and came home to troubleshoot. Spark from main, and also at the
> plugs, so it wasn’t ignition (although for the life of me I couldn’t imagine
> why the tach quit). Checked that all grounds were solid, volt meter showed
> proper voltage at all points between dist and Hall sensor and ICU.
> Continuity and resistance also checked in spec. Still no start. Plug on
> dist where Hall effect doo hickey (technical term) plugs in was
> deteriorating, so I unplugged it and soldered new leads on it, plugged it
> back in, checked for continuity, and siliconed my new wiring job for water
> fastness. Still no start, so I started thinking fuel (good call, Danny).
> Shot a couple of squirts of ether in the intake, fired right up, then died
> when ether was used up. Before I siphoned 12 gallons of gas out and
> replaced the pump, I checked vacuum lines on intake and to the FPR – guess
> what, one was cracked BAAADDD. Replaced it, still no start, so I went to
> the fuses, everything LOOKED okay, but I replaced the fuel pump fuse anyway,
> praying that if it wasn’t that, it was at least the pump and not the relay.
> Voila, car started fine, ran for 5 minutes, and I took it for a spin around
> the block. AND the tach worked. Must have been a combo fuel pump fuse /
> Hall effect sensor connection problem. Here’s hoping it starts tomorrow
> morning so I can catch my 5:55 am plane to Omaha! Thanks for the
> suggestions!
> Chip
> 85 900 T 16V
> 173K miles
Glad to hear it got sorted. By the way – if you ever have to change the pump,
you don’t need to syphon the fuel out first. I did a friends car with him, fuel
tank was full, but luckily the parts in the area are plastic – no sparks
likely. We removed old pump assembly, found replacement pump only (much
cheaper) installed it in the pump assembly and refitted, all with a tank almost
full to the brim. Biggest pain was removing the large holding ring – a real
pain, and also the pipe unions to the pump – they are a snap fit, but one
usually breaks if you are not careful – 1 has a filter inline, and one isn’t
available separately, which can mean a fiddly job if you happen to break the
wrong connector. I also found that removing the rear seat is a real help!
(Saab 9000CD – saloon)
–
Regards,
Danny
http://www.gaggia-espresso.com (a purely hobby site)
http://www.dannyscoffee.com (UK advert for my mobile espresso service)
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Comment by admin — July 30, 2010 @ 12:48 am