I've got a 1991 964 turbo that has sat for little over a year and had fuel stabilizer added to fuel and ran before car was put in storage now it won't start. I was able to get it to try to run a few times but not more than a second or two and it will start on starting fluid but once thats burned out it stops. Anyone have any ideas as to what my next step should be? I've drained tank and put 5 gallons of fresh fuel with fuel system cleaner in it so far.
Thanks

 

Does the fuel pump run ?
Do you have fuel pressure ?
Do you have fuel squirting ?

Fuel pumps can rust fast if unused for a year .

 

Thanks for the help, I can hear what sounds like a pump in front run and a rear pump run also but have not checked fuel pressure yet I'll check that tomorrow.

 

That would be my first place to start looking is pumps and seeing if there is pressure. Then maybe the regulator.

 

I would expect it will take a while to flush the old fuel from the lines. Can you loosen a fitting at the engine and bleed off a cup or two of the stale fuel? Carefully . Unhook the coil first so no errant sparks and wipe up any spills before attempting to start it after. I have a similar experience every year after seasonal storage of my boat.

 

I'd be reluctant to use starter fluid as the that can burn a hole in a piston pretty quickly. I had a diesel welder generator which had problems starting in the winter and I used starter fluid and eventually it burnt a hole in the top of the piston due to the hi compression of these types of engines and which your turbo is too. Even bad fuel has the potential to do this in a turbo as I remember reading a post on either Rennlist or Pelican.

 

The NA engines have test ports on each fuel rail where you attach hoses for measureing fuel pressure and flow. Definately start by getting a FI service kit, and checking the fuel system. Collect fuel in a container and check for water at the bottom. If the fuel has gone bad, it is best to flush it (I once gave my to someone whose truck tolerated bad gas).

If the engine still will not start with clean fuel and good fuel pressure, you probably have stuck injectors. It is common.

 

Did you run the car after you added the stabilizer?

If no, then you could have varnish clogging your fuel lines and injectors. I'd suggest you are very careful with this once the car runs again because you don't want fuel flow interrupted to any cylinder under boost as it will destroy your engine.

If you ran the car after adding the sabilizer then you either have a stuck injector, clogged fuel filters, bad accumulator, fuel pump etc... Good advice above.

 

Sounds like it's time to junk it. I'll take it off your hands if necessary.

But seriously, you need to check fuel pressure. Since you have a 91 turbo, you have the old CIS system. These older systems are a little harder to troubleshoot without pressure gauges. It is probably your warm up regulator. The WUR controls the cold fuel pressure and affects the hot fuel pressure. you can check out this link http://www.pelicanparts.com/911/tech..._Bosch_CIS.htm