Question about 1989 Mercedes-Benz 300-Class

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WHEN ENGINE IS COLD, IT TAKES FOREVER TO START

When engine is cold it takes forever to start up.and another 5 mins running before you can drive. 89 g-wagon 230

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  • Mercedes-Benz Master
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Try fuel pressure regulator. OVP relay is another good bet.

Posted on May 16, 2010

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1989 mercedes 560 sel, gas, w126/ Car cold starts every morning and idles for 10 min. then stalls


the idle control motor probly worn-on the throttlbody--also the tps sensor - get intake area inspectd--a haynes manual will xplain complete car-partstore hazit--------starter fluid is used for low compression or weak spark

Dec 25, 2013 | Cars & Trucks

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89 cutlass cierra crank but wont start when wet out unless gas pedal is pushed


This should be a drive by wire vehicle meaning it has a cable for the throttle body. First thing would be to see if any error codes can be pulled up (most parts stores will do that for free.) Drive by wire versus the late model that use electronic control for the idle have a IAC or idle air control which when first started controls the idle air intake--all air is run by it to idle the vehicle when cold--

Usual symptoms are rather high idle when cold engine or even idle and RPM jumping up and down and stalling when cold.

Another way if idle does drop when cold is tapping the gas--engine will still run until hot. Means not usually a fuel pump issue.

You could also have if the vehicle is fuel injected a dirty Mass air flow sensor, a throttle position sensor, etc.

These can be if the vehicle has them cleaned using a special zero residue spray cleaner.

First have it scanned to see what if any errors it shows--the computer.

Dec 17, 2012 | 1989 Oldsmobile Cutlass Ciera

1 Answer

Runs rough when cold


What engine is in the vehicle? Is the check engine light on? A possibility is intake manifold gaskets.

Dec 13, 2011 | 2001 Ford Escape

1 Answer

GMC VAN 89 ,STARTS AND RUNS RUFF FOR 5 MIN.,SMOOTHS TO A PUR FOR 10 MIN,THEN RUFF AND DIES. SAME IF YOU TRY TO DRIVE IT. SET FOR AN HOUR BACK TO SAME WAY . PLEASE HELP....


YOU COULD HAVE RESTRICTED FUEL FILTER OR FUEL PUMP COULD BE FAILING. FUEL PRESSURE SHOULD BE 9 - 13 PSI FOR THE GAS ENGINE.IF YOU HAVE 6.2 DIESEL ENGINE YOU FUEL FILTER STOPPED UP OR YOU HAVE FAULTY LOW PRESSURE TRANSFER PUMP.YOU COULD HAVE FAULTY FUEL SOLENOID AT THE INJECTION PUMP.

Jul 04, 2011 | 1987 GMC VanDura

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1995 Grand cherokee 5.2 engine, when cold takes forever to start up. once hot will start up on first try. i changed the spark plugs but same result. idles fine runs good. Spark plugs were dry when...


Living in New England we have some cold days. What I find helps, but not necessary your problem, is to turn the key to the "on" position for 5 seconds or so and then turn the key to actually start the engine. Its starts right up without major pull on starter or battery.

Nov 21, 2010 | 1995 Jeep Grand Cherokee

1 Answer

Very hard to start in the morning.Has new battery, plugs and plugwires and engine turns over good but it takes 8-12 trys before it starts. After it does start if you touch the gas peddle it dies. After it...


Fuel injected? My 87 Porsche and 89 Alpha Romeo have Bosch fuel injection system (the best). They both have a cold start injector driven by the onboard computer. Computers hardly ever fail. But the sensor that tells the computer that the engine is cold can fail or the cold start injector can fail or be dirty. Please go to your autoparts store and get a repair manual, best $ 25 you will ever spend. Good Luck!

Mar 06, 2010 | 2000 Volkswagen Jetta TDI

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