Question about 1991 Mercedes-Benz 190

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Merc 190e fuel injection problem

Spark to plugs ok engine cranking ok petrol ok to bosch distributer, but no fuel to injectors

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  • Anonymous Mar 18, 2014

    merc c230k 1998 2020 starts then dies as if injecters dont receive sufficient fuel

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If the fuel gets to the distributor but no fuel comes out of the distributor if the airflow disk pushed into the air/fuel mixure body, i suggest you check the electro-hydralic-actuator
merc 190e fuel injection problem - 53703cc.jpg Its the black box (picture thanks to elproboscis from ebay america) as it controles the flow to the pluger body inside the centre of the distributor and goes from the plunger direct to the 4 outlines.

Posted on Aug 18, 2008

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You have a kink in the fuel line, or your pump is bad.

Posted on Jul 22, 2008

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1 Answer

Getting no power to fuel pump fuse no power to ignition fuse


no engine stated.!

fuses good,? 12vdc on both sides key on?

spark good on all cylinders.??????????

this is first. not fuel, fuel is dead last.

if above is ok the engine runs on test fuel.

if the engine runs for say 3 seconds on test fuel, and SOUNDS

great, that means the spark and engine are ok, leaving>?

FUELING only.

easy , right?

if true all that, then the scan tool is next.

wont buy one,? like most here? (you cant fix cars with no scan tool)



make up or buy a NOID lamp. (a small 12vdc lamp)

see if the injectors are all firing.

if not, the PCM is cutting fuel.

if the injectors fire (electric pulse) then it may be fuel relay not closing.

did you check for 12vdc (11vdc min) at the pump? cranking

you must crank it and check,

there are 3 kinds of cars. (we assume last)

1: pump runs keyon, full time, (illegal now)

2: pump runs for 3 seconds, and stops keyon, (for priming only)

3: runs only cranked, (most cars) and runs running engine.



see that logic there?

some cars cut pump and injection with no spark. ( to cut fires)

this logic is inside the PCM brain, called firmware.

just assume the car is smarter and use #3 above. on all cars

and I win..



the scan tool will show errors cranked for 5 seconds.

does it?



now why i cant leave generic help and answer specifcially

no engine stated.

to fix them you need to know whats there, first.



the line up

1.4 L E-TEC I4 (petrol)

1.6 L E-TEC I4 (petrol)

1.8 L Family II I4 (petrol)

2.0 L Family II I4 (petrol)

2.0 L RA 420 I4 (diesel)





next time post the engine in your car.

open hood , look up see EPA sticker there and engine type?

USA answers... all. of mine, as this is a USA forum../

try to add to one post for one problem not make many unique posts. stay on NO START. please.

Apr 04, 2015 | 2006 Suzuki Forenza

1 Answer

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compression may be weak--residual fuel pressure cud be low--spark mite not be strong enough-inspect plug wires-coil-ignition module-distributer cap--timing belt may have slipped a notch--is battery at 12.6volts and cables tite--

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Corsa no spark on spark plugs


dispack failing. or failed I.e were the spark plugs lead to. they can just fail over time or just go without warning

Dec 20, 2012 | Opel Corsa Cars & Trucks

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My Mitsubushi Space Star Car won't Start. What can I try?


spark plugs are deep in the head yet you should get all the the old fuel out first, stale fuel wont ignite and will also clogg fuel filter. you need a mix of atleast 70% new fuel even then its not good for the injecters. If its a manual gearbox a tow start is a quick fix although no go for auto's. cant be much wrong if car was fine when parked, plugs-fuel-filter and possibly fuel pump for sure. If that doesnt fix take plug out put in lead and crank engine to be sure you have spark even just put any plug you know works in lead leaving your plugs in engine just to check for spark y turning over engine looking for spark on plug good spark will be blue but any spark is good.

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1 Answer

My W201 190E initially developed a cold start problem. It would misfire then gradually idle smoothly as the engine temperature increased. Presently, it is not starting. I have checked the fuel line but the...


use an ohmmeter to check the rotor (center to tip) check the cap from inside to the plug ends with wires installed, compare to spec. check the coil wire end to end. 1kohms per foot. inspect cap well.you can see differently in sunlight and controlled light. compare to a bosch cap and rotor. use a 12v test light to check coil primary leads one should be a steady light and the other should flash (while cranking) be sure the rotor turns when cranking. get a mercedes book from the library. i like the haynes books on my 190E. read, read, read.. check fuses. look up STAR tek info on google. look at your maint. records and see if you are way behind. use standard copper plugs from bosch. unless oem was alot different. look for hoses cracked or popped off. i mean really look. mine had hoses for cruise leaking and hoses for adjustable lights that were unplugged. not even equipped, but dead end at front turn signals. weird. but spark and an audible fuel pump, a cold start injector are all key, as well as an eng coolant temp or thermotime switch. as yours may be equipped with both or either. i found an open in mine. if this is beyond you, theres books for that too at library. manifold grounds are in the front of the intake (always brown) or (earth) gotta be tight. hope you find it quick. dont keep cranking till the starter overheats. i would rather wait till i was pulling the eng. and trans than replace one in chassis!!!!

Sep 05, 2011 | 1990 Mercedes-Benz 190

1 Answer

Spark flooded with petrol


You need to test each injector plug with a injector noid light.Have someone crank the engine while you observe the light.It should flash off and on at a steady pace.Test each one to make sure you have steady injector pulse,if they all test ok then you should not have a fuel delivery problem.Also if your spark plugs are wet or black they are fouled and you will need a new set.

Jan 26, 2010 | 1997 BMW 318

1 Answer

1992 190e mercedes won't start? never had any trouble with it b4. its got spark. and i can here the fuel pump. and there is fuel getting to the fuel injector distibuatior.but not cuming out of the fuel...


it sounds like your fuel distributer is clogged. Replace your fuel filter. first you can try to bleed your system. take 12mm. wrech and loosen up you lines(one at a time) and crank your engine over(with a battery charger)and force your fuel bubbles out of the lines. while the engine is cranking and the line is loose knock on the line with the wrench and you will probably see a whole buch of rust poor out of the loose fitting. do thius repeatedly untill engine fires off-then with engine running loosen up your lines and repeat if any lines loosen up and there is no idle change that means that cylender is not firing and your injecter is not working. These mechanical style injecter's take alot of pressure to open the poppet valve to spray fuel.hope I have been helpful

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2 Answers

Mercedes benz 190e 1900year /air flow meter connections


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2 Answers

Cranks but wont start


Engine Cranks But Will Not Start

For an engine to run, you need three things to happen inside the engine. Compression, fuel and ignition, without any one of these components the engine will not run.
Basic Checks:

A. Test Fuses. Test both under hood power distribution center and the fuse panel under dash. This is done with a test light tool. The test light should illuminate on both sides of the fuse, if not the fuse has failed and needs to be replaced.
B. Testing Fuel Pressure Test for proper fuel pressure with a test gauge on the fuel rail, most throttle body injection cars (TBI) are between 13 psi and 17 psi. and most (DPI) direct port inject systems are between 40 psi and 55 psi. If no or little fuel pressure is observed and there is 12 volt power present the fuel pump, the fuel pump needs replacing.
C. Checking Timing Belt Test for compression by removing a spark plug and insert a compression gauge. Crank the engine over about 5 seconds the gauge should read between 125 psi and 165 psi, if no compression is observed remove front engine cover to inspect timing belt or chain. Crank engine to observe cam rotation, if the cam does not rotate the timing belt or chain has failed. (note: if the timing belt drives the water pump it is best to replace the water pump at this time)
D. Test for Injector Pulse Remove injector connector to insert injector test light (node) or volt meter. Observe light flash or gauge pulse while cranking. If light/voltmeter doesn't respond, an ignition distributor/crank angle sensor (CKS) or an ignition module is most likely your problem.
E. Test for Ignition Spark Remove spark plug wire, insert an extra spark plug into end of wire, rest spark plug next to a ground source then crank engine. You should observe a blue spark between the spark plug gap and ground source. If no spark is observed, an ignition coil, ignition rotor or spark plug wires might have failed. (always keep hands away from engine when cranking)

Jul 14, 2008 | Hyundai Motor 2002 Sonata

2 Answers

Doesn't start


1. Test Fuses. Test both under hood power distribution center and the fuse panel under dash. This is done with a test light tool. The test light should illuminate on both sides of the fuse, if not the fuse has failed and needs to be replaced.
2.Testing Fuel Pressure Test for proper fuel pressure with a test gauge on the fuel rail, most throttle body injection cars (TBI) are between 13 psi and 17 psi. and most (DPI) direct port inject systems are between 40 psi and 55 psi. If no or little fuel pressure is observed and there is 12 volt power present the fuel pump, the fuel pump needs replacing.
3.Checking Timing Belt Test for compression by removing a spark plug and insert a compression gauge. Crank the engine over about 5 seconds the gauge should read between 125 psi and 165 psi, if no compression is observed remove front engine cover to inspect timing belt or chain. Crank engine to observe cam rotation, if the cam does not rotate the timing belt or chain has failed. (note: if the timing belt drives the water pump it is best to replace the water pump at this time)
4.Test for Injector Pulse Remove injector connector to insert injector test light (node) or volt meter. Observe light flash or gauge pulse while cranking. If light/voltmeter doesn't respond, an ignition distributor/crank angle sensor (CKS) or an ignition module is most likely your problem.
5.Test for Ignition Spark Remove spark plug wire, insert an extra spark plug into end of wire, rest spark plug next to a ground source then crank engine. You should observe a blue spark between the spark plug gap and ground source. If no spark is observed, an ignition coil, ignition rotor or spark plug wires might have failed. (always keep hands away from engine when cranking)

Jun 16, 2008 | 2000 Nissan Quest

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