Leaky Injector

DMECMAnderson · Post by **DMECMAnderson** » Sat Oct 06, 2007 2:22 pm

I've been trying to fix a drip leak in my fuel injection on my 81 Spider. The #4 (closest to the firewall) injector seems to be leaking. I've changed the upper and lower seals, replaced the hose but I'm still getting a steady drip from the injector area. It's impossible to determine where it's coming from.

Could the injector have a leak in it, near the connector?

So Cal Mark · Post by **So Cal Mark** » Sat Oct 06, 2007 4:06 pm

the injector body can leak, then it's time to replace the injector. Bosch as discontinued making the Fiat inj so you have to buy an aftermarket or a rebuilt one.

spider2081 · Post by **spider2081** » Sat Oct 06, 2007 9:26 pm

Is it possible to take the rail off with the 4 injectors attached?? Leave the hose connected to the fuel line to the pump. Plug the line to the cold start valve and turn on the key. I think that will pressurize the rail. Cranking the engine will make each injector spray. Maybe then you will see the leak. I'm wondering if the rail pipeing has a pin hole in it.

DMECMAnderson · Post by **DMECMAnderson** » Mon Oct 08, 2007 10:34 am

The leak only occurs when the engine is turning. No leaks with the ignition "on".

racydave · Post by **racydave** » Mon Oct 08, 2007 6:54 pm

You could rotate the injector to another cylinder to see if the leak follows the injector. I like to use lube on the seals, and clean up the mating surfaces. Sooner or later every fuellie needs these seals replaced. If you crank her over, be sure to DISABLE the ignition. Wouldnt want her on fire.

So Cal Mark · Post by **So Cal Mark** » Mon Oct 08, 2007 10:01 pm

the fuel pump should run for 2 seconds when the key is turned on. If yours doesn't do that, I expect you have long cranking times to start. You could just jumper the relay to make the fuel pump run, then search for the leak. You've got to be careful with FI leaks since fuel can drip into the starter. I've seen several catch fire as soon as the starter was operated after fuel dripped all over the starter.

DMECMAnderson · Post by **DMECMAnderson** » Thu Oct 11, 2007 8:46 pm

Purchased a new injector from IAP, $145 (Ouch!

) Put it in the car fixed the leak. Root cause was a bad injector.

DMECMAnderson · Post by **DMECMAnderson** » Mon Oct 22, 2007 7:37 pm

When replacing my fuel injectors, I found that one of the studs holding in the #3 injector was "replaced" by a previous owner by a bolt. I would like to put a stud back in. Makes me a little nervous to be screwing and unscrewing a threaded bolt rather than a nut...

Anyone know where to find these?

manoa matt · Post by **manoa matt** » Mon Oct 22, 2007 8:42 pm

A good hardware store, McMaster Carr, Grainger, or I have a whole FI setup I'm not going to use, I could take one from that and send it to you, might take a week or so comming from Hawaii.

Matt

DMECMAnderson · Post by **DMECMAnderson** » Tue Oct 23, 2007 6:36 pm

We've got all of those stores here in ATL

Don't think you need to send me something from the Aloha State! You might need it out there when you hitting the pipeline!

manoa matt · Post by **manoa matt** » Tue Oct 23, 2007 6:44 pm

My wife has taken up surfing, I've taken up wrenching.

Leaky Injector

Leaky Injector

Injector leaking