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Fuel Pump Issue?



  Saab 93 Aero Wagon
Something i noticed recently when starting the car from cold in the morning was that the car tends not to start cleanly on the first turn of the key.
I then noticed, due to me having no rear seats so its easier to hear, that the fuel pump doesn't seem to activate on the first turn but it does on the second.

Is this a fuel pump issue?:S
 
  172 Race Car
Should prime for a second with ignition on, then run on cranking.

Could be the pump or control relay playing up.

iirc markcup had a wiring faut on his fuel pump circuit ages ago. Also at a Bedfor trackday recently there was a cup that broke down on track, we traced it to a loose connection on the pump itself. Might be worth checking this as if you have stripped it something may have knoked the wires where they pass through the black cover.

If its not running when you crank its also worth checking the crank/tdc sensor. take it out and give it a clean they attract the dust from the clutch and can cause poor cold start due to a weaker signal
 
  Saab 93 Aero Wagon
Hmmmm...ok. It definitely does prime when the ignition is on. Just seems to take two attempts to wake it up!


Cheers for the advice Jay...will have to investigate. I think the clutch may be on its way so maybe the tdc sensor is grubby as its definitely suffering from a poor cold start.
 
  172 Race Car
Worth checking mate, I do loas of them at work on all types of Renault. Clean it off with some brake or carb cleaner
 


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