Question about 1990 Mercedes-Benz 190

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1990 190E auto turns over but doesn't ever catch

My car was driving fine until one day it began to lose idle and eventually stall when approaching a stop. I would have to turn the key and the engine turn over a few time before it would catch. When it did catch, it seemed to really lag at the low speeds and would again stall out at the next slow to stop. It began to get worse and worse until (the day I decide to take it in) it turned over but never caught. A friend of mine suggested that it might be the fuel injection filter seen as how it is automatic. I've got the car up on blocks as I type. Any other thoughts? If that is the case it looks like it would be roughly a 40 dollar fix. I'd much rather do that than have to take it in.

Thanks, Kai

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  • nhiggins Jan 14, 2009

    can you tell me which fuse controls the fuel injection?

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My car is a 1993 190e 2.6
For Zero dollars you should check the Over Voltage Protection fuse before spending any more money. When burnt out this thing can really cause some strange things to happen example: ABS light on, low rough idle speed, difficult or no starting without a "jump". My battery was new, the starter and alternator were fine. I was Lucky enough to know an expert he took one look at it swaped that fuse and all was good. Immediatly good idle, ABS light went out, Car starts great.
Check it first!
By the way you can change the brushes on your starter with out even removing it from the car.

Posted on Mar 17, 2009

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Check the distributor and cap for moisture and corrosion

Posted on Mar 18, 2009

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Fuel filters are found on all Mercedes, whether standard or manual transmissions. That's a good place to start. Another place is the fuel pump fuse in the fuse box. Fuses in MBs are notoriously flaky; you might be getting intermittent voltage to the fuel pump. Check to be sure the fuse TESTS good or replace it. MB fuses can look good but be intermittent. Before changing the filter, I would start by dumping some injector cleaner into the gas tank and leaving it sit for a day. It will work its way through the fuel line. Then try to restart. This sounds like a classic fuel issue.  I had had a 300TD diesel behave exactly the same way and threaten to quit on an isolated expressway near the Canadian border. I limped to a town with an auto store, bought some injector cleaner and it solved the problem.

Posted on Dec 29, 2008

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