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1986 Porsche 944 Questions & Answers
Wont start
Check you can hear the fuel pump running with ignition on, remove a plug lead from the spark plugs and hold I cm away from top of spark plug with insulated pliers while someone cranks the engine there should be a clear spark between lead end and plug top, if not then most likely the ECU is faulty.
Extra key lock
It's kind of crazy to think of it now, but back in the 80's, Porsche thought this was the most stylish practical place to put the switch for the alarm system. Some of them have it, some don't, as it was an option.
1986 porsche 944 dont pass ca smog running too lean
Probably Nox too high. Can also be engine too hot. Last time cooling system serviced? Also can be carbon in the combustion chamber ignites fuel too soon. Fuel delivery system and all sensors may be a problem. Bad or corroded connections can contribute to bad behavior of the ECU.
Cranks over. But wont start.
Pull the injectors and have them tested for electronic continuity and spray pattern as the needle may be rusted up or the coils in the injectors corroded away for the long period of no use. Regardless of what engine you have if you have spark at the correct time --compression --fuel then you must have go in the engine . Continuing to run will depend on the make and design as the other variables come into play.
Knocking noise Porsche 944
sounds like it could be "knocking from the cam". i would throw a thing of SeaFoam or Marvel Mystery Oil in the oil slot. my knocking went away in 100 miles. the stuff works wonders. Good luck. My knocking used to be very loud the higher the rpms.
Want info about factory recommended spark plugs for 1986 Porsche 944
You do not have to many options for these cars. You can you use Bosch WR7DC which are like a copper plug, or if you can find them, you may have to order them online, NGK Iridium IX plugs work really well. Thats what I had in my 944T along with a MSD Blaster 2 coil I picked up and a set of plug wires I bought from Lindsey Racing when I bought the plugs.
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