Big O

Hey, been a while. I'm usually on the ever-shrinking e-mail list. But I still have my '89 Turbo S and the '91 S2 Cab.

And the latter is the rub. Anyone out here source a '91 S2 fuel injector lately? Or rebuilt them? I have an intermittent miss, usually occurs right after starting the car (hot or cold) or after a WOT/heavy-throttle run. Goes away by the time I stop the car and/or pull one spark plug wire at a time. It's not the distributor cap or rotor, spark wire, or spark plug (all are un-fouled, so it's not flooding a cylinder). So I'm suspecting an intermittent injector that only fails when/after being asked to run a longer duty cycle. Maybe the actuator overheats or who-knows-what.

BUT - '91 seems to be the bastard year. Bosch part number 0-280-155-003, Porsche 944-606-120-00. Dealer says backordered from Germany, $812 each. Confirms what I've found here in the forums in (very few) old posts. Sooooo . . . anyone have a better source? Or a recommendation where to rebuild these? Anyone deal with this recently?

(I'm afraid if I pull and send them out, they'll find one bad one they can't rebuild and I'll be out of a car for weeks - but I wanna take this thing on a 5000 mile tour in 3 weeks. So preferably, I'd like to do an exchange or grab a used one!)

Thanks,
O

Dimi 944

I have a set available from the '91 S2 I am parting out. Sent a PM.

J Berk

Not to hi-jack the thread but since I also have a 91 S2.....how are the window rubbers (on the outside of the doors) ? If they are still nice I'd be interested.

What color is the car?

V2Rocket

What would stop you from finding an off-the-shelf 30lb/hr fuel injector and swapping it in, adding resistors if needed?

944meister

I got my oem fit Bosch injectors for my 91' S2 off of autopartswarehouse.

944meister

I just checked and they have the GB remanufactured injectors for $40 each, they were actually the ones I got, but they do offer the Bosch units for $100 more. I haven't had a problem with the GB injectors for the two years they have been installed.

Dimi 944

The car is titanium metallic color. I will take some pics of the window rubbers and PM them to you.

krazykarl

http://www.ebay.com/itm/1991-Porsche...fc05f4&vxp=mtr

Big O

krazykarl, that ebay listing *says* it's the right one, but they don't look like my OEM ones. Mine are brown, the auction is for green ones. From https://rennlist.com/forums/924-931-...-late-s2s.html, mine should be brown.

Also from another post, 91 injectors should be Bosch part # 0-280-155-003. That's exactly what mine say on them. Unfortunately, I cannot read the digits on the eBay listing. But I'll ask.

944meister, I searched a lot of sites for the re-manufactured ones, and also looked at AutoPartsWarehouse.com. If you put in "1991 S2", it spits out GB part 852-12147 or Bosch W0133-1602513. Unfortunately, if you put in 1990 or 1989 at the same site, they return the *same* injector. Obviously this can't be right (even the dealer I called said it's a unique injector in '91 but wouldn't give me the part #), so I don't trust those sites if they don't distinguish between the 89/90 and 91 injectors.

Why is my stuff always the "special" model? Seems to be the story of my life. (I've been driving 5 different 944s since 1991, so I'm somewhat used to it by now . . . but this one is the oddest!)

Thanks!

944meister

The GB injectors I got are brown tops, it would also be good to find out what change was made to the injector for the 91' model year. There can't be much of a difference at all I would think, I know the DME was different with its internal diagnostics, but that's about it.

944meister

I'm certain mine are brown tops, but ill double check tomorrow.

944meister

You could also just send the injectors to witchhunter, people seem to have good luck with them.

Eric_Oz_S2

The 89-90 S2s had ballast resistors and low impedance injectors. The 91 had high impedance injectors and no ballast resistors. You could run the early injectors but you would need to get a set of resistors. An alternative is to get a set of later injectors like the Siemens 44 lb/hr ones and modify the injector constant in the DME maps (easy if you know how).