can you disconnect the idle control valve (1987 420sel) and clean it with carburetor cleaner?

how do you know if it is gunked up/or if the valve is not working?

lyle

I'd use electrical contact cleaner.easy on plastics

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Yes you can. It has a flap inside.

you can but it not usually going to fix it. Where does your idle sit?

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual

I tried cleaning mine on the 420SEL. It didnt really help all that much. My idle is just a few ticks underneath 1000. Sometimes It'll sit the normal 550 or so sometimes not.

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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

A replacement unit is $185 or so.

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

Dang those things have gone up!!! Mine would sit about 1100 and cleaning would not improve the condition so I replaced it. I think I paid like $90 or so a few years back. It worth it. Saves your drive train from flying apart when shifting into reverse.

__________________
1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual