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 10 Porsche 944 -83 (Read 1959 times)
snobben
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Porsche 944 -83
Jun 20th, 2019 at 8:18pm
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Hi

I have a 944 -83 that starts perfect but just run on low rpm (1000 ) when i give gas its missfire and its not running on all cylinders. The distrubutor rotor and cables and sparkplugs is new, All sparkplugs has the same "coulor" when  i change them .
Any idea....

( New member from Sweden )

  
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Dave W
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Re: Porsche 944 -83
Reply #1 - Jun 20th, 2019 at 9:34pm
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Do a search for "AFM tuneup".  It's also on the Clark's Garage site.
  

Dave - black 84 no longer exists. Sad 83 self destructed. All better now. Smiley
... Let's go hit some twisty roads! ...
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snobben
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Re: Porsche 944 -83
Reply #2 - Jun 22nd, 2019 at 8:04am
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Hi

Thanks for the information . A lot of good information on Clarks garage.

Now i have to first test the AFM meter

Best...
  
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OhioTom
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Re: Porsche 944 -83
Reply #3 - Jun 24th, 2019 at 6:20pm
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A bad TPS switch will do that as well.
Getting water in them is very common and will do what you describe.
it is located on the bottom side of the throttle body. So if you cleaned your engine, then it got wet....
  

Tom Simpson&&VW/Porsche freak.
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snobben
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Re: Porsche 944 -83
Reply #4 - Jul 15th, 2019 at 8:17am
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Hi

Now i have test a little bit more...

it seems that there is spark on all cylinders up to 1000 rpm .
but you give more gas there is no spark on cylinders 2-3 but 1-4 is working ?

I dont think tis any petrol problem ,  could it be the databox ?

Any one that got the same problem ?

Best .....
  
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Dave W
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Re: Porsche 944 -83
Reply #5 - Jul 15th, 2019 at 3:10pm
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It's pretty cheap to replace the distributor cap and rotor.
  

Dave - black 84 no longer exists. Sad 83 self destructed. All better now. Smiley
... Let's go hit some twisty roads! ...
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snobben
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Re: Porsche 944 -83
Reply #6 - Jul 15th, 2019 at 5:02pm
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Hi
Yes ,it was the first i did . New cabels , sparkplugs , distributor , rotor , without result . Same problem .
I tryed to clean whit air around the flywheel and a lot of dust came out  . Perhaps some metal dust from starter . But the sensor for speed and referens seams to work . And way is it just cylinder 2-3 that missfire....

  
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Dave W
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Re: Porsche 944 -83
Reply #7 - Jul 16th, 2019 at 4:17pm
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The reference sensor is key to spark timing. and the speed sensor is also involved.  Either one or both might be going bad.  Most people just replace both of them since they typically fail about the same time.
  

Dave - black 84 no longer exists. Sad 83 self destructed. All better now. Smiley
... Let's go hit some twisty roads! ...
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snobben
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Re: Porsche 944 -83
Reply #8 - Jul 17th, 2019 at 9:29am
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Hi
Thanks for your answer , perhaps next stepp is to change sensors .
I notice that when the engine is warm it seams to go better , you can speed up to 2000-2500 rpm whit out missfire .

But still next stepp is to check and change sensors.
  
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snobben
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Re: Porsche 944 -83
Reply #9 - Aug 12th, 2019 at 3:57pm
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Hi
The problem were the sensors . After the change the car runs like normal.

Thanks for the help i got from all of you in this forum .


Best
Ingemar
  
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OhioTom
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Re: Porsche 944 -83
Reply #10 - Aug 30th, 2019 at 7:08pm
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great news.. thanks for sharing..
  

Tom Simpson&&VW/Porsche freak.
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CW 951
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Re: Porsche 944 -83
Reply #11 - Aug 31st, 2019 at 5:54pm
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snobben wrote on Aug 12th, 2019 at 3:57pm:
Hi
The problem were the sensors . After the change the car runs like normal.

Thanks for the help i got from all of you in this forum .


Best
Ingemar

Great news!

Thank you for taking the time to post what fixed your car's problem. Smiley  This kind of stuff can possibly help someone else who may have similar problems in the future.
Most of the time people fix their problems but fail to follow up with what actually fixed them.
  
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