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924 Misfires and stutters

 
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Superkaiser  



Joined: 19 Feb 2019
Posts: 3
Location: West-Germany

PostPosted: Tue Feb 19, 2019 4:56 am    Post subject: 924 Misfires and stutters Reply with quote

I’m from Germany and English is not my native language, that means you can expect some writing mistakes


I have already read a lot of threads in several forums, but haven’t found a working solution yet.

My car is 1983 Porsche 924 2.0

My problem: yesterday my engine began to stutter while accelerating. On my way home the engine shut down while I stoped at a traffic light, or rather the rev counter jumped to 0 then to 1000 and then the engine shut down. After I cranked the starter for a few seconds, the car started again and I was able the drive home, the engine was stuttering and jerking relatively strong.

At home a realized some misfires(bang from the exhaust), when I hit the gas a little bit while idling.

Until now I was able to fix all my problems with my 986 and my 924 with the help of forums in the internet...

Besides from these problems my 924 ran pretty good, I was also been driving max speed (+200km/h) several times on the Autobahn.

The spark plugs seem to be ok and have a brownish color. Also the wires look ok and they fit good on the plugs.

Is there a way to check the Hall effect sensor (idk. if that’s even the English name)?

Every help would make me happy!!
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morghen  



Joined: 21 Jan 2005
Posts: 9095
Location: Romania

PostPosted: Tue Feb 19, 2019 6:05 am    Post subject: Reply with quote

Maybe the ignition coil is bad when heating up?
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Superkaiser  



Joined: 19 Feb 2019
Posts: 3
Location: West-Germany

PostPosted: Tue Feb 19, 2019 9:42 pm    Post subject: Reply with quote

[quote="morghen"]Maybe the ignition coil is bad when heating up?[/quote]

I also have the misfires when my engine is cold, but maybe the coil is not as good anymore. At least it looks very old.
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Paul  



Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin

PostPosted: Wed Feb 20, 2019 12:28 am    Post subject: Reply with quote

Welcome to the board.

If your tach is reading properly when misfiring and while accelerating, I suspect it's fuel related. Fuel filter? Fuel pump? Fuel relay?

Also check for vacuum leaks.
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Silver 98 986 3.6l 320 HP "Frank N Stein"
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Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.
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Superkaiser  



Joined: 19 Feb 2019
Posts: 3
Location: West-Germany

PostPosted: Thu Feb 21, 2019 4:36 am    Post subject: Reply with quote

Thanks Paul, I’m going the replace the filter first. Any way to check the fuel Relais?
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK

PostPosted: Thu Feb 21, 2019 5:50 am    Post subject: Reply with quote

Look up Thomas at werk924.com as he's in Germany. He is Herr 924!!
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Then www.924board.org/viewtopic.php?t=31252
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