Porsche Enthusiasts Club Forum :: View topic - 944 engine tick over Rev counter

Your warm idle should be between 800 and 850, adjustment procedure here:

http://www.clarks-garage.com/shop-manual/fuel-08.htm

Don't rely on the rev counter for accurate rpm reading, buy yourself a cheap digital counter, it's counts the pulses to a spark plug and the calculates the rpm for 4,6 or 8 cylinders
http://www.ebay.co.uk/itm/Spark-Plugs-E ... SwHnFVrigY
for what it's worth there is an adjusting pot on the back of the rev counter which you can calibrate your rev counter with, I did mine but it's a compromise as I preferd mine to be accurate around the 3K mark so mines a little out at idle (approx. 750-800)

I've order it but I'm not sure what I should do with it when I get it to set it right?

j.c wrote:

dh3259 wrote:

I've order it but I'm not sure what I should do with it when I get it to set it right?

j.c wrote:

Just noticed you have an early 944, so not sure about you tacho, Just looking at a photo there's no adjuster on the back, there maybe one inside the unit but prob not worth taking apart and risk killing it, if I were you I would use the digital tacho to learn how far out your one is and just live with it

Author:	dh3259 [ Fri Dec 02, 2016 9:05 pm ]
Post subject:	944 engine tick over Rev counter
Can anyone tell me what the idle revs should be please on my car, 1983 2.5 8v as from when I got it it was idling at 1000 but now its dropped to 900 until I drove it hard and then it goes back to 1000. I've had it in to the garage and they have fitted an auxiliary air valve as they said it was broke inside and that it should idle at around 900 but I'm not convinced they also did the inlet gaskets and changed my oil. Thanks.

Author:	flt505 [ Sat Dec 03, 2016 10:50 pm ]
Post subject:	Re: 944 engine tick over Rev counter
My S2 ticks along around the 850 -900. Most any engine is the same. It is worth lubricating the throttle linkages with some WD40, cleaning them off, then using a lighter oil on the throttle springs or even a light grease, just to free-up any dirt that is offending...

Author:	dh3259 [ Mon Sep 11, 2017 8:50 pm ]
Post subject:	Re: 944 engine tick over Rev counter
I can't belive how slow I am at replying, I am indeed sorry. Firstly thank you for your quick reply. I have ha da headache over this with a few Porsche specialist garages not having a clue what they are doing, perhaps it's a Wirral thing! Either way I decided to have a go myself as the cold start had stopped working thanks to a garage and they claimed it was because it was summer........even though they changed my Auxilery Air Valve under the manifold £400 later to tell me it should start on 800 (fom cold) even though for the past year it would (from cold) start at 1100 and drop to 1000 when warm. So I asked around (garages) but they have no clue so I got a new OE air pipe and an aftermarket Throttle valve and changed them myself, a bit of a job as one allan bolt was rounded and one throttle bolt also, but I did it no problem over the weekend just gone and its starts (from cold) now at 1000 and as gets warmer drops just under to about 950. I would like it back to how it used to be, so I am right in thinking that the adjusting screw on the throttle will adjust only the fuel for when it is cold by setting the revs at 1100 and then when its gone warm use the air mass adjusting screw to set it at 1000 for tick over?

Author:	hotblack944 [ Mon Sep 11, 2017 9:03 pm ]
Post subject:	Re: 944 engine tick over Rev counter
Your warm idle should be between 800 and 850, adjustment procedure here: http://www.clarks-garage.com/shop-manual/fuel-08.htm

Author:	dh3259 [ Mon Sep 11, 2017 9:12 pm ]
Post subject:	Re: 944 engine tick over Rev counter
Wow that low really? Feels like its gonna cut out to me that low? hotblack944 wrote: Your warm idle should be between 800 and 850, adjustment procedure here: http://www.clarks-garage.com/shop-manual/fuel-08.htm

Porsche Enthusiasts Club Forum http://forums.tipec.net/

944 engine tick over Rev counter http://forums.tipec.net/viewtopic.php?f=25&t=22096	Page 1 of 1

Author:	j.c [ Tue Sep 12, 2017 12:21 am ]
Post subject:	Re: 944 engine tick over Rev counter
Don't rely on the rev counter for accurate rpm reading, buy yourself a cheap digital counter, it's counts the pulses to a spark plug and the calculates the rpm for 4,6 or 8 cylinders http://www.ebay.co.uk/itm/Spark-Plugs-E ... SwHnFVrigY for what it's worth there is an adjusting pot on the back of the rev counter which you can calibrate your rev counter with, I did mine but it's a compromise as I preferd mine to be accurate around the 3K mark so mines a little out at idle (approx. 750-800)

Author:	dh3259 [ Wed Sep 13, 2017 8:55 pm ]
Post subject:	Re: 944 engine tick over Rev counter
I know I must come across stupid here but I couldn't make sense of the information on that link? hotblack944 wrote: Your warm idle should be between 800 and 850, adjustment procedure here: http://www.clarks-garage.com/shop-manual/fuel-08.htm

Author:	dh3259 [ Wed Sep 13, 2017 8:56 pm ]
Post subject:	Re: 944 engine tick over Rev counter
I've order it but I'm not sure what I should do with it when I get it to set it right? j.c wrote: Don't rely on the rev counter for accurate rpm reading, buy yourself a cheap digital counter, it's counts the pulses to a spark plug and the calculates the rpm for 4,6 or 8 cylinders http://www.ebay.co.uk/itm/Spark-Plugs-E ... SwHnFVrigY for what it's worth there is an adjusting pot on the back of the rev counter which you can calibrate your rev counter with, I did mine but it's a compromise as I preferd mine to be accurate around the 3K mark so mines a little out at idle (approx. 750-800)

Author:	j.c [ Thu Sep 14, 2017 12:20 am ]
Post subject:	Re: 944 engine tick over Rev counter
dh3259 wrote: I've order it but I'm not sure what I should do with it when I get it to set it right? j.c wrote: Don't rely on the rev counter for accurate rpm reading, buy yourself a cheap digital counter, it's counts the pulses to a spark plug and the calculates the rpm for 4,6 or 8 cylinders http://www.ebay.co.uk/itm/Spark-Plugs-E ... SwHnFVrigY for what it's worth there is an adjusting pot on the back of the rev counter which you can calibrate your rev counter with, I did mine but it's a compromise as I preferd mine to be accurate around the 3K mark so mines a little out at idle (approx. 750-800) Just noticed you have an early 944, so not sure about you tacho, Just looking at a photo there's no adjuster on the back, there maybe one inside the unit but prob not worth taking apart and risk killing it, if I were you I would use the digital tacho to learn how far out your one is and just live with it

Author:	dh3259 [ Mon Oct 02, 2017 4:51 pm ]
Post subject:	Re: 944 engine tick over Rev counter
Okay thanks for the help. j.c wrote: dh3259 wrote: I've order it but I'm not sure what I should do with it when I get it to set it right? j.c wrote: Don't rely on the rev counter for accurate rpm reading, buy yourself a cheap digital counter, it's counts the pulses to a spark plug and the calculates the rpm for 4,6 or 8 cylinders http://www.ebay.co.uk/itm/Spark-Plugs-E ... SwHnFVrigY for what it's worth there is an adjusting pot on the back of the rev counter which you can calibrate your rev counter with, I did mine but it's a compromise as I preferd mine to be accurate around the 3K mark so mines a little out at idle (approx. 750-800) Just noticed you have an early 944, so not sure about you tacho, Just looking at a photo there's no adjuster on the back, there maybe one inside the unit but prob not worth taking apart and risk killing it, if I were you I would use the digital tacho to learn how far out your one is and just live with it

Page 1 of 1	All times are UTC [ DST ]
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group http://www.phpbb.com/