okay so i have a 1993 190e 2.6 i think not sure...mechanic says it's 3.0 but i cant tell, well that's not the problem but it has bout 145k miles was running fine then about six months later it stalled and would not start it would spitt out white smoke once i got it home everytime i tried to start then after 30 tries it started anyways i changed fuel pumps(2) for this 190e and fuel filter also then it ran fine for about 4 months when it started to act up, loss of power, feels like i get 1/4 mile to the gallon but it would shift really hard and sometimes at maybe 3000 rpms it sputters while trying to shift but if i floor it then it runs fine also sputters while i rev in park but anyways i took it to europe repair shop they told me it was flex disc and me like a dummy went ahead and ordered but took it some else where to get second opinion and the guy says feels like it's fuel starved advised me to check fuel injectors in which took me the whole day today to do(first time) they were all clean but clean around and blew em just to make sure, tried running the car and i guess it helped just a tiny bit but then i thought it might be fuel distributor since i let the car run out of gas until empty one time when it did not start so maybe fuel dist. is clogged? any help. PLEASE!!!! I WOULD REALLY APPRECIATE AND SORRY FOR SUCH LONG STORY BUT MORE DETAILS THE BETTER THE HELP RIGHT?

 

Saucony23,

I have been around these cars a long time, and when it comes to fuel system, I doubt anyone will be able to pinpoint the problem, without actually putting instruments on the fuel injection. Also, regarding the fuel system,general tinkering, without instruments, a specific trouble-shooting plan, and Mercedes training, tends to only make it worse. And this includes general repair shops that do not specialize in German cars.

A tech will most likely first check for any obvious problems visible to the eye, such as missing or cracked vacuum hoses, shoddy repairs, air leaks etc. Then perhaps check the code bank to see if any clues appear there. After that, a step by step test of the fuel components may have to be performed. They can test each component of the fuel system to see if it is operating within acceptable limits.Mercedes specifies these limitsand little judgement is required; if it is out of spec, it needs to be replaced. Do not be surprized if such testing reveals that several components need to be replaced. In my opinion, one of the biggest threats to the fuel system is water; it tends to corrode the inside of many fuel parts for example, including the fuel cell, fuel lines, and fuel distributor.

A German repair shop here will put instuments on a car and give a full repair report for under $200.00. This does NOT include the parts or actual repair. It may include: Testing the fuel pump pressure with a pressure guage, testing the fuel pump volume with a graduated beaker, checking the leak-down of the fuel injectors, fuel lines and fuel accumulator to verify that they hold pressure. Check the fuel-air adjustment with a dwell-meter, Stoichmeter, etc. Check the proper operation of the fuel distributor and air flow sensor. Check cylinder compression and valves with a compression meter.

 

hey BlueSilver thnx alot for all that info but yea i just spent about $240 for a front flex disc replacement job and have three tickets i need to get rid of before they take me lolso taking it to the shop at the moment would be out of question even though it needs to bebut i spent the whole sunday trying to tinker with it before i saw your respond here and i checked if there was any fuel comming from the distributor onto the fuel lines that connect to the injectors that i had cleaned the day before just to check and fuel was indeed going through then i got one of my bright ideas to check the spark plugs so i checked gap and if they did actually spark which they did and i wanted to take the fuel distributor apart to check if it was clogged but im guessing it's not since fuel is indeed comming out from the fuel dist. to the fuel lines exept i didnt know how to test injectors so i havent checked the injectors yet. i also read something saying it may have to do with im guessing the catylic converter being clogged from deposits of some sort i dont know if there's a way to check for that or clean withouth instruments but i appreaciate your help BlueSilver anything i can do at home without instruments and your help will be greatly appreciated.

 

oh also before i forget, is there any way to check the modulator without instruments i know you've said everything would need instruments to test but i was just wondering

 

Saucony23,

I have pretty much found a way to get any job done on the car with regular tools except when it comes to the fuel system. As a matter of fact, fuel system problems seem to give my dealer and the local German shop a great amount of trouble. I swear you can have fuel at the injectors and spark at the plugs, but if the system isn't tuned just right, it will not run, and I do not know how to tell you to do it at home. i wish you luck; hopefully it is something small.

Blue

 

hey blue, man just my luck...lol well i know the reverse lights went out but they used to work just fine..i dont know if the backup switch has to do with any of my sputtering problems since i guess it is connected to the transmission or is that just totally out of ?

well thnx for the last response blue i really appreciate all your responses

sau23

 

On these models, the reverse light switch will not affect the engine.
Its a simple on/off switch; you can check it with a volt meter, test light, or by jumping the two wires together to see if the reverse lights come on.

blue

 

oh no the lights work if i rig them but it is just when i put the car in reverse that they do not come on so i was thinking it might be the backup switch underneath the car directly under the center console but i took my car to many shops and all i got is that it read code 14 and they said that it was the speed control that goes to the tranny?

 

Yes, I was thinking reverse-light switch too as being the simplest problem. Good grief, I didn't know the speed control could stop the lights from working.