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Cuts out and doesn’t like idling
Hi guy,
First of all I have a 1975 911s 2.7L LHD from California and it’s not running right. I have owned the car for 2 years as a side project and I have never driven it but I have videos of it driving from the guy I purchased it off. Anyway to the problem.... When I turn the key it doesn’t want to start But if I push the accelerator down just a little it starts, and if I keep the accelerator in the same place its fine but as soon as I take my foot off the pedal the car dies straight away, I have tried adjusting the idle screw both ways and it doesn’t seem to make a difference. The car has a new fuel tank, fuel pump, fuel filter and the fuel distributor rebuilt as it was leaking. Also a new CDI box, ignition leads, ignition coil, starter motor and battery. So like I said your help is greatly needed so I can get it on the road for the first time! Thanks Sent from my iPhone using Tapatalk |
Are you pulling up the hand throttle (next to / left of the hand brake) to engage the cold start circuit? The engine needs more fuel on cold start so all those components need to be operable.
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What happens if you keep the accelerator pressed for 1-2 minutes and then let it idle?
What's been done to the engine? Is it the original CIS? |
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https://uploads.tapatalk-cdn.com/202...ef9ef859af.jpg I had a look and there was no white plastic bit there to connect to the cable, so I have ordered one and should be here in a few days, so that lever wasn’t doing anything! I will keep you posted and how it goes.https://uploads.tapatalk-cdn.com/202...8c2a52a241.jpg Sent from my iPhone using Tapatalk |
Here is the starting procedure, and links to adjusting the hand throttle if needed.
http://forums.pelicanparts.com/porsche-911-technical-forum/732035-adjusting-hand-throttle-74-a.html http://forums.pelicanparts.com/porsche-911-technical-forum/639786-hand-throttle-lever.html http://forums.pelicanparts.com/uploa...1588621169.gif |
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Thank you... I’m still waiting on the part to arrive, will keep you posted. Sent from my iPhone using Tapatalk |
Right guys it’s been some time!
I think I found my problem but I need your help, So I got new fuel injectors and made sure the fuel distributor was spraying out equal on all 6 injectors.[emoji736] This is what I found... car wasn’t idling because the plate wasn’t getting to the right height to release the fuel and air wasn’t passing the plate. https://uploads.tapatalk-cdn.com/202...d767c633cd.jpg Photo 1 Engine off- plate is at normal height. (This is what height I would expect to see the plate ones the fuel pump is on... or am I wrong?) https://uploads.tapatalk-cdn.com/202...6cc6b03ea3.jpg Photo 2 Fuel pump running - the plate is to low so as I turn the key to start it and the plate raises up like it should do, it’s not enough to start the the injectors. https://uploads.tapatalk-cdn.com/202...fb04b368fe.jpg Photo 3 The height the fuel starts to spray from the injectors / this is the height it should be on idle, up enough so air can pass and start the injectors. So really what I’m asking is how I adjust the plate hight up so when the fuel pump is on it’s sat at the right height? Before you ask, this is how I think I found the problem... https://uploads.tapatalk-cdn.com/202...3ecbd7f3e3.jpg I wedged a block under the leaver so when the pump is on it doesn’t drop.. then when I start the engine the plate rises and the car idles at 1000/950 RPM like it should, this is why I think the hight is my problem. Any help welcome please Sent from my iPhone using Tapatalk |
Search adjusting CIS air sensor plate for a 75. My 74 had this issue and the adjustment is made by bending the strange clip in your photo to change the stop height for the plate. A schematic makes it clear. Basically your improvised stop has to be duplicated with the clip. Good luck, John.
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Thank you John, Nothing seemed to come up when I searched.. you wouldn’t happen to have a link do you? Just had a look at it again... where you referring to this clip to bend? https://uploads.tapatalk-cdn.com/202...a2516f5a82.jpg When I make it longer to push the plate up it dose that but when the pump is running it still pushes the plate down! https://uploads.tapatalk-cdn.com/202...3c9ed169f9.jpg As the plate goes down that clip gets lose and affectively does nothing to prevent the plate from moving down to much. Sent from my iPhone using Tapatalk |
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