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Posted by: thewheel69 Sep 19 2022, 10:47 AM

So im trying to diagnose a stuttering issue that seems to occur after about 15 min. of drive time. She starts cutting out at low RPM and then will climb erratically if I mash the throttle. I have installed a new flame thrower coil which does seem to give her more pep but still having this stuttering issue after warm/hot.

I unplugged this resistor (I think thats the name) and the engine stopped so it must be important but the wires are very brittle and look to be about to pull out from the ceramic tubes/cylinders.

Pelican says No Longer Available
https://www.pelicanparts.com/More_Info/022906079.htm?pn=022906079&KeepHeader=Y

Thanks for any insights as I have tried all the other diagnosis familiar to me.

John

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Posted by: sportlicherFahrer Sep 19 2022, 11:58 AM

Part 8a in the diagram. Ballast resistor for the FI on the 1.8l L-jet. May have luck posting a want to buy in the classifieds if you're looking for a replacement.

http://www.autoatlanta.com/porsche-parts/hardparts.php?dir=porsche-914-parts&section=901-05&pn=022906079#a

Posted by: 914Sixer Sep 20 2022, 06:07 AM

Contact Bruce Stone he had some NOS resistors.

Posted by: bdstone914 Sep 20 2022, 07:47 AM

@http://www.914world.com/bbs2/index.php?showuser=5275

I have several good used ones.
The usual problem with them is the wires get broken at the base of the resistors.
Bruce

Posted by: thewheel69 Sep 20 2022, 10:44 AM

QUOTE(bdstone914 @ Sep 20 2022, 05:47 AM)

@http://www.914world.com/bbs2/index.php?showuser=5275

I have several good used ones.
The usual problem with them is the wires get broken at the base of the resistors.
Bruce

Hi Bruce, thank you for the offer. Can you kindly let me know your asking price and logistics so I can have as a backup please.

John Foster
720-308-4032
john.b.foster@gmail.com

Posted by: dr914@autoatlanta.com Sep 20 2022, 10:52 AM

the resistor block is not the problem, it only fails when one of the wires disattaches itself causing one cylinder not to fire. Try points condenser dwell timing firsts. Resistor blocks are totally available by the way

QUOTE(thewheel69 @ Sep 19 2022, 09:47 AM)

So im trying to diagnose a stuttering issue that seems to occur after about 15 min. of drive time. She starts cutting out at low RPM and then will climb erratically if I mash the throttle. I have installed a new flame thrower coil which does seem to give her more pep but still having this stuttering issue after warm/hot.

I unplugged this resistor (I think thats the name) and the engine stopped so it must be important but the wires are very brittle and look to be about to pull out from the ceramic tubes/cylinders.

Pelican says No Longer Available
https://www.pelicanparts.com/More_Info/022906079.htm?pn=022906079&KeepHeader=Y

Thanks for any insights as I have tried all the other diagnosis familiar to me.

John

Posted by: Van B Sep 20 2022, 07:42 PM

How are your grounds? Especially the ground strap on the transmission.

Posted by: wonkipop Sep 21 2022, 03:38 PM

i wonder if your problem is not fuel delivery related.
sounds like the symptoms.

like a filter is blocking?
or a bend in fuel line is collapsing and constricting?
or the sock in the tank is collapsing/blocking?
these sorts of things start to happen after a short period of running.
gunk builds up against the filter for instance.
after you switch off it floats away again and lets the fuel through - until repeat.

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