I just got my 914 out from winter storage and it is running pretty rough. When my foot is off the gas it will idle too slow and putters out within a few seconds. If I give it some gas it runs ok, however I did notice it seemed to be backfiring a little.

What would be the likely causes of this?

Thanks

Original FI or Carb(s)?

Uhhh... as I posted like 90 minutes ago.. you did use brand new gas, right?

Use an additive, clean your system.. deglaze the lines... yikes BE CAREFUL.


M

Japenese beetles getting lodged in fuel lines, sock filter plugged, fuel pump on the way out, hoses causing vac leak, or the solar flares from the sun.

Fuel injectors could be gunked. Sediment (rust) could be in the tank. Air could be in the lines. Gas could be getting varnishy in the fuel lines.

Could be a number of things...

I only had maybe 2-3 liters in the tank for almost 5 months and then I filled with new gas. It ran better on the old gas it seemed. I was going to leave the tank full but my front trunk wouldn't open the day I parked it for the winter. I actually ran out of gas completely... well I got home but when I tried to start it the next time it wouldn't start until I added some gas.

It is original FI.

Maybe I'll try new spark plugs (I have no idea how old the ones in my car are...) and some kind of injector cleaner. Are those injector cleaners safe?

Someone will come along with the name of the one that makes your car run like shit, until you fill it up again.


M

Ok I thought it might be helpful for some if I posted an update.

Things got worse... Pretty soon after I posted last it wouldn't even start. I was getting frustrated so I pulled it in to the shop. The mechanic found that an air hose was disconnected. That was it. They put in some injector cleaner and thank god the bill was small. Drove it home and she was running great.

Something so simple and I didn't see it. Oh well. Too bad the weather has been so crappy here in the last two days... rain and snow... in May