My 1990 300e idles a bit low and rough. Especially when warm. Also it sometimes takes two or three attempts to start. Lots of things to check out, I know, but anyway today I decided to do the injector seals. Very cheap and potentially helpful.

Basically it is an easy job. It's good to have a ball-end hex key for the holders. Like this


And a semi-closed 14mm wrench for the fuel lines:


Remove the air filter box and loosen the cable canal to get access

Use a 17mm wrench to counter hold the holder and release the fuel line. I did not release the fuel lines from the distributor.

Injectors out


I was absolutely not able to slide the old seals off. Tight fit. I simply broke them to pieces. Wise grip locking pliers is handy.

At first I didn't realize that the plastic sylinders going down in the manifold can come loose too. Just pull them out. Fitted o-rings to them and refitted. (Was much quicker the second time in the same day... - see below. Thanks duxte1!)


The injector 3 and 4 is a bit of a hassle to reach but apart from that it is smooth sailing.

Anyway - car started - difference was ... Subtle. At least I know these parts are ok now. Should probably have the injectors inspected and/or replaced too. Later

The O-rings seal the plastic injector holders into the intake manifold, and not the injector to the holder.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

Thanks for the reply. Pull the plastic "tube" and put the o-ring underneath? Would it matter if they stay where they are? It seems to be running fine

- edit - did it properly. Edited post. Thanks

Post #9

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Watch him go!!! link

#dontdealwithkahlil

The two seals arrowed plus the yellow tube - good idea to renew all when changing injectors

Larsco thank you for the walk through .This is my next job .I have all the parts waiting to do it ...

Thanks for this post. I plan to do my fuel injectors soon too but I wasn't sure which parts to order besides the injectors themselves and I didn't want to get into the job and discover I didn't have everything I needed. That's the worst.

Stick some [IMG] tags around your picture URLs and we'll be able to see them!

The last tag needs to have a "/" character before the "I" to indicate the end of the link

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Img doesn't work with Dropbox it seems... [img]https://www.dropbox.com/s/uluf0a40uf38zhv/Photo%2024.07.2016%2C%2015.27.51.jpg/img]

Let me try

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

I copied your link in your quote but it didn't work - so I right clicked on the picture in drop box and then copied the URL to get the first picture of your series...

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

ok - that's it - thanks

Now they've all gone.

It looks like dropbox is blocking

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Larsko did you have any fuel come out from the injector pipes after you removed them?

No - i removed pressure from the system first. Removed the fuel pump relay (behind the battery) and ran the starter for a few seconds