Question about 1990 Porsche 944

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I have a 1991 Porsche 944 S2 Cabriolet The fuel gauge needle is not working it is all the way down. It worked fine until trecently when my mechanic took the sensor out to try to syfon gas out of the tank. He also changed a relay in the fuse box under the hood for the AC not staying on. I checked the fuse it shows ok. Is there another one or could it be something else? The reserve light does come on when low on fuel this is the only way I know to fill up. Can you help me?? Craig

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Using chevron gas in the tank may be the easiest solution to your problem, don't ask me why but, it worked for me AND I WAS TOLD JUST AS YOU ARE BY ME.

Posted on Nov 14, 2010


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If I test the fuel pump on a 1991 porsche 944,outside of the fuel tank, should the pump run continuously or make a short buzz?

it will make a short buzz to pressurize the fuel lines then it will work when your driving to keep the pressure in the line. it should only go contiously if you have big arftermarket fuel pump for drag/race cars but street cars will do what isaid above.

Aug 16, 2010 | 1991 Porsche 944

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I Have a 1991 944 S2 and it runs great or it was

If moisture builds up in the distributor cap this can cause the problems your having.
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Mar 27, 2009 | 1991 Porsche 944

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Oct 30, 2008 | 1990 Porsche 944

1 Answer

Can not start motor on porsche s2 cabriolet 1990 year (battery and fuel okey)

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Oct 30, 2008 | 1990 Porsche 944

1 Answer

Porsche 944 S2 inaccurate petrol gauge reading and oil level warning light

This is not a known solution, but in general these cars suffer from voltage and current drops on electrical connections due to corrosion on contact surfaces. I cannot remember the number of times I have read about electrical problems on these cars, and the problem was usually solved by cleaning the electrical contacts or replacing a relay going bad (BTW, this car does use a lot of relays however I doubt there is one in the fuel gauge circuit).

Also, I have a spare gauge cluster for the 944 and when I look at it, there are some resistors on the "printed circuit" piece. If one of those were to lose tolerance, or burn open, it would no doubt have an effect on the accuracy of the circuit. I would check out that circuitry and test the resistor values as a last resort -- it is not likely the gauge itself if it is working at all. However, before doing that I would clean the electrical contacts thoroughly. I have not tried to gain access to the wiring harnesses for the gauge cluster while it is in the car, but I doubt it is possible. So, if you have exhausted all other ideas go to the Clark's Garage site for instructions on how to remove the dash, and just follow the portion that applies to removing the gauge cluster. Go to the local electronics hobbyist store, or online, and obtain a good contact cleaner and clean all of the electrical contacts while also looking for loose or broken wires. NOTE: Be careful and gentle dealing with the plastic connectors on these cars as they tend to be brittle and little tabs break off easily if man-handled. Go slow, be in the right frame of mind and use good lighting so that you can see what you are doing.

Oct 23, 2008 | 1990 Porsche 944

1 Answer

Air filter replacement- 944 s 3litre model k reg 1992

If this is like my 89 944S2, the air filter is located under the sheetmetal between the two headlights! The mechanic told me to raise the headlights and use a very LONG phillips head screwdriver to get to the screws to temporarily remove the sheetmetal and get to the filter. (You could verify this by talking to a body shop that has worked on the front end of an S2, or perhaps find an online schematic of the car). Good luck with it--I hope this helps.

Oct 22, 2008 | 1991 Porsche 944

1 Answer

Heater constanly blowing warm air

Very common problem. Heater control clips break and must be replaced. I found a lot of info on the web including instructions and pictures. Clips are cheap at They aldo have the instructions and pics.
Good luck

Jul 11, 2008 | 1990 Porsche 944

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