190 2.6 warm starting problems - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 12-29-2005, 08:41 AM Thread Starter
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190 2.6 warm starting problems

Update:

My 190 starts fine on cold mornings, or any cold start, but after reaching running temps if I turn the car off and let it sit for five minutes it sputters and dies, sputters and dies, after about three or four attempts it fires up reluctantly and then runs perfect.

It has a suspiciously low idle once warmed up, but when cold started the idle is higher as it should be, which indicates that the idle control valve is working as well as the cold start valve

This car has only 52K miles and had been sitting for over two years

Steps I have taken:

(1)Run fuel treatment through the system
(2) New bosch spark plugs
(3) cleaned the idle control valve with carb cleaner
(4) run carb cleaner through the intake
(5) new fuel filter
(6) checked the fuses on top of the fuel relay, they appear to be fine, cleaned the connection with electronic cleaner
(7) checked and cleaned the rotor button and distributor

(8) Had the fuel pump pressure checked (over 90 psi consistently)

Any other suggestions, i'm desperate. I've been told the oxygen sensors can go bad, would this cause this?


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post #2 of 6 (permalink) Old 12-30-2005, 09:54 PM
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RE: 190 2.6 warm starting problems

You may want to check your temp sensors.

If one has failed and is telling the puter the car is cold then you wont have as much trouble cold, but if its telling the management system its cold when infact its warm. Well you get the point.

I sugest this because they are know to fail and they are easy to test and replace. I know the black 4 pin one on the back of the head is for the fuel system, but recall having running results better once when changing the small (blue?) one by the #3&4 intake area on the head. go figure.

Is your 2.6 one of the later models. If so you can check to see if it has any codes stored in the ECU.
The plug would be by the upper strut mount and the battery. No special tools are needed to check this.

G/L[:)]

Yikes foregot you posted this in the wrong area so you may want to move it to the w201 repair section if you already havent. I havent looked there yet.

300E M104
190 16V
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post #3 of 6 (permalink) Old 01-01-2006, 07:12 PM Thread Starter
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RE: 190 2.6 warm starting problems

To be honest i don't know the body style or where to post - could use advice on that as well.
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post #4 of 6 (permalink) Old 01-01-2006, 08:21 PM
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RE: 190 2.6 warm starting problems

When you are on this page.. http://www.benzworld.org/forums/default.asp

Scroll down until you se the section that sayes W201 190 E,D W201 is the chassis # for the 190E or D.

That is the section that you will find all the 190 owners posting and viewing.

300E M104
190 16V
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post #5 of 6 (permalink) Old 01-01-2006, 08:53 PM Thread Starter
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RE: 190 2.6 warm starting problems

Thanks for all of the suggestions. I tried checking out the temp sensors, cleaned the connections, etc. However the comp says that I am reading no malfunctions -

I disengaged the idle control valve to see if there was a noticiable difference, and of course the car promply died, which makes me believe the relays are working as well (my understanding is that the relays control the valve)

I'm starting to think that the fuel accumulator is not working properly which would let fuel back out of the lines when I shut the engine off. During cold starts the cold start valve would help prime the engine....does this make sense to anyone, is it logical.

This car is going to be the death of me.......
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post #6 of 6 (permalink) Old 10-06-2006, 09:24 AM
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I had the same problem.
Replacing the fuel injector seals solved the problem.
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