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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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Intermittent fault, possibly crank sensorViews : 4075 Replies : 18Users Viewing This Thread : |
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Sep 16th, 2014, 12:03 | #11 |
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I'm not trying to be a smart ar#e in saying this but do you mean the injection relay under the bonnet clocks ?
As far as I know the fuel pump relay is in the car on the fusebox. The injection relay or radio suppression relay as it's officially known is in the engine compartment, normally just above the battery whichever side it's on. Why Volvo didn't fit all the relays inside the car I don't know it would make life a lot more simple. |
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Sep 18th, 2014, 13:38 | #12 |
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Sorry, yes that is indeed what I was referring to - though since I replaced both these relays at the same time I am not sure which was the culprit! (replacing them both also probably caused the terminological confusion...)
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Sep 18th, 2014, 14:51 | #13 |
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I swapped the injection relay and the crnak sensor when my cars started having an intermittant starting problem. never actually found out which was the problem then.
It did it a couple of time more recently then didn't start at all so at least I got to swap a couple of things to see what the fault actually was. This time it was the injection relay. I re-soldered it and it was fine. One thing I did notice was that being a non genuine (not Bosch or Volvo) it wasn't made quite as well so I swapped it again for a better one. I now carry a crank sensor, fuel injection and fuel pump relay in the car just in case. |
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Sep 19th, 2014, 12:08 | #14 |
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Yeah There are three FPRelays in my car! Just in case ...
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Oct 11th, 2014, 15:37 | #15 |
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I had this happen to my old 940 some years ago but the sensor was stuck in the bell housing and it snapped off flush. I had to melt it out with a soldering iron and push it into the bell hosing, then remove the starter motor turn the engine by hand and remove the bits from the hole where the starter fits. it was a right pain in the butt to do a 20 min job it took about 3 hours to do. at at least the sensor cost me nothing from a scrappy.
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May 12th, 2021, 10:47 | #16 | |
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Volvo 940 Celebration estate 1997 Last edited by ingmar; May 12th, 2021 at 11:41. |
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May 12th, 2021, 15:15 | #17 | |
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However, the daunting bit comes in firstly locating it, secondly getting the bonnet vertical (some people don't realise this can be done), having the reach of Guy the Gorilla and the dexterity of an 8 year old playing games on their/your phone. Usually it's a straightforward job without problems but any problems and you start getting into some grotty realms! The daunting bit far outweighs the simplicity of the exercise so well done for having a go and getting it done! I find this is the perfect task to show someone new to spannering that no matter how daunting a job may seem, if you break it down into a series of simple operations (as i did above) that most jobs are in fact fairly simple and the daunting bit is getting into the mindset to attempt the job. In short, have confidence in yourself and give it a go! If things start going pear-shaped, put a post on here as we're all here to help!
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May 13th, 2021, 00:29 | #18 |
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10mm ring spanner when I replaced mine on my B230FK.
Locating it was the hardest. Removed dipsticks and used torch to locate area and by feel undid the bolt. Once out great! Simple re-install new sensor. Align the hole in sensor bracket to hole for bolt and fit bolt by hand and tighten up. James. |
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May 13th, 2021, 00:38 | #19 | ||
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With that in mind, on a post 96 car, the rev counter could drop to zero as the ignition wouldn't be firing either.
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