1992 940 Sedan fuel injector o ring replacement

Nixwe · Post by **Nixwe** » Tue Dec 11, 2018 8:44 pm

Hello, I am quite new to my little car, so I need a lot of help with her. This car has had the the check light on since my husband drove her a total of 143 miles one day. Since then, I've noticed the smell of unburned fuel emitting from the engine when I turn the ignition to off. After several weeks of searching and searching I saw one single injector wet with fresh fuel. I have recently purchased new o rings for all 4 injectors and I'd appreciate any help I can get to replace them.

I'll most likely be asking for more help soon after I've replaced the o rings, since this little Tweet has more than the fuel scent issue.

Thank you for all the help given.
Nix

Post by **abscate** » Wed Dec 12, 2018 11:34 am

Hello Nix!

940s belong in the other forum but let me look for a thread there and link before I drive your Volvo brick over there.

This is a mature person car forum and we often have people nearby willing to give a hand if you are up to strangers on the internet meet. I’m in the middle of dumping a family Laguna Beach house so I’m in SoCal once a month.

Nixwe · Post by **Nixwe** » Wed Dec 12, 2018 11:47 am

Thank you for informing me of posting in the wrong forum. I'm not entirely sure where I should post my difficulty, but, I need all the help with my little car as I can get.

Post by **abscate** » Wed Dec 12, 2018 11:54 am

Don’t worry about forum for now.

Part number 1346393 ( I found at FCP Euro, one of our many sponsor vendors here is cheap, about $7. I looked for a thread on fuel injector service on the 940 with no luck, so I’ll move this over there for help

I’ll leave a shadow thread here so you can find it. You can always search under your own posts or use that part number above, too.

Nix..fuel leaks are dangerous and if it’s really wet you should stop driving it. Anyone in the family who isn’t all thumbs to help guide you on replacement?

Sorry, I’m really jet lagged and see you have the kit already.

Nixwe · Post by **Nixwe** » Wed Dec 12, 2018 1:16 pm

It's my only vehicle to and from work, Dr appointments, orthopedics, the works.
(My husband has to travel up to 100 miles in one direction for work every day. He uses the only really safe vehicle for that reason. And, final vehicle needs a new gear box, transfer case, rear drive shaft, and the transmission to be properly set.
[I apologise, it seems to me that my message can be misconstrued. I mean no negativity towards anyone.])

I don't see the injector(s) wet with fluids. It only has that scent and light amounds of dampness after I drive it for more than 30 minutes.

Post by **abscate** » Wed Dec 12, 2018 8:42 pm

Ok , let’s get that sorted before it is an issue

Despite the site owners desperate attempt to make the P2 line “ fetch” ( it’s not happening, Karin) the P80:forum is the happening place. I flagged a thread as we have several people who own P80s and940s there.

Let’s see what the cat drags in.

93Regina · Post by **93Regina** » Wed Dec 12, 2018 9:42 pm

abscate wrote: ↑Wed Dec 12, 2018 11:34 am940s belong in the other forum

Huh...red blocks are red blocks...last I knew.

Post by **jimmy57** » Thu Dec 13, 2018 8:04 am

Prep: use an air blower or vacuum and clean the area where the ends of injectors insert into intake manifold so dirt doesn't fall into that hole when the injectors slip out. If fuel is present it best not to use vacuum as the fuel vapors could be ignited by the arcing of vacuum cleaner motor.
Once cleaned then remove the two bolts holding fuel rail with injectors to the intake manifold. Spray some WD-40 or similar at the end of injector to make it easier for injectors slip out of the holes. Lift, or if needed pry, the injectors with rail upward to clear injectors from the holes. There is a clip on each injector on the rail that holds injector to rail. pry it sideways with small screwdriver. Wrap a rag around the injector to catch fuel and prevent it from spraying on you and wiggle and twist while pulling injector from rail. Only the first injector has risk of fuel spray from fuel pressure. Disconnecting fuel lines will also spray fuel and you might break the fitting trying to get it loose as that fitting is usually TIGHT. Pull and leak with a rag is the safe way. Repeat the clip removal and injector removal for the other 3. Once removed the o rings can be worked out of their grooves o top and bottom ends of injectors. Use some sort of oil to lube o rings and work them int the grooves without tools. Risk of harming the new seal with a tool.
Reinstall injectors into rail and fit clips. Push rail with injectors into the holes and then install and tighten bolts. BE sure no wires found under those two bolts are left off. Cycle ignition on 3 times for 4 seconds each time to pressurize the fuel rail and then inspect for leaks. There is a chance that the injector itself has the leak. You usually can't see where they leak so replacing the seals is how you eliminate the seals as cause or fix it with new seals.

Post by **tryingbe** » Thu Dec 13, 2018 9:38 am

Remove fuel rail, remove fuel injectors, remove fuel injectors o-rings and caps, install is the reverse.

I hope you got the right kit.

93Regina · Post by **93Regina** » Thu Dec 13, 2018 10:08 am

tryingbe wrote: ↑Thu Dec 13, 2018 9:38 amI hope you got the right kit.

That's not the problem...its getting the right counter person...always an issue.

If a fuel injector shop exists in your area...no sweat, but a higher price.

Volvo 1346393 should be the right number for OEM injectors...but there are cheaper kits available.