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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,646
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You are doing the right thing. First find out why #5 is not firing. Troubleshoot first. A lot of shops don't take the time to do this properly. Are you dealing with a Porsche specialist, or a shop that fixes many types of cars?
Did he replace all the wires? IF so, it sounds like he used the shielded wires (they have the metal braid on them). Those are not necessary and a PITA to install and work around. The Clewett wire set has a good rep and is not shielded.
The injectors do wiggle a bit, since they are mounted in thick rubber o-rings. Squirt starting fluid or carb cleaner around those injectors when the engine is idling and see if that makes any difference in running.
You should NOT get any arcing from the coil to the shielding. If you are, the insulation of the coil wire or the coil tower are cracked. Inspect those carefully.
"Smoke test": This is the best way to identify intake and vacuum leaks. Tell them to do a smoke test before replacing anything. .
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
Last edited by PeteKz; 10-29-2023 at 12:24 AM..
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