[Arcnspark]

I have been using Chevron Techron in my p-car 2-3 x yr with no probs. IIRC- the Techron is the only additive authorized by Porsche.

 

[dolucasi]

Last time I visited dealership I was told if I only used Chevron with Techron I will never experience fuel injector issues (after the injector replacement)
That was over 3 years ago. I only put Chevron premium with techron in the tank and have not experienced any issues so far.

So I second that emotion.....

 

[garymand]

If you’ve seen my previous post then you may have read that my car had a varnish problem when I first got it. Long story short, cleaned the tank using a siphon pump, new fuel pumps new fuel filter, which got the car running with 0 problems for a few months now but it still has a very rough idle at start up settling down after about 10 seconds.

Just recently got a new EHA and it has reduced the hard start and rough idle significantly although the car still often takes 2 or 3 attempts to start and sometimes it’ll start on the first try. i think my injectors are glazed and sea foam/fuel injector cleaner has not helped much.

Is it possible to pull my injectors and clean them manually by hand? Or would it be better to buy new ones?

Maybe this is normal for these cars and their age? I see many people with, multiple start attempts, hard start and/or rough idle issues but are still able to drive with relatively no problem.

 

[garymand]

Hi, I just used a kit and pump I got on ebay and Youtube. I worked perfectly. 2 of my injectors were spraying a partial cone. The kit lets you back flush the internal screen and the spring area behind the exit port. The pump allows you to push the recommended paint acetone or paint thinner through to see the spray pattern.

I only have 100k on the motor, but I am tuning the injection pump with a wideband and want to make sure i wasn't compensating for an injector problem. I was able to fix or verify all the other variables, but without this pump and kit, I could not be sure of the injectors.

Now that I have done that, the motor was a bit richer, which made good sense. I am getting good repeatable measurements, so I do not need the pump and kit -can't imagine I will ever need it again. It cost me about $180.

Are you interested?

 

[Betterdaze]

I decided to leave my injectors alone because the hex nuts where seized and I didn’t want to round them. I’ll hit them with some PB blaster this weekend and try again.

Instead I went ahead and dropped in Stabil 360 which helps protect against ethanol and did another oil change because I had mistakenly listened to the autozone guy who’s computer said to use 5w30.

I changed the oil to 15w40 and the car has been starting on first attempt and the idle is way way smoother. Forgive my lack of mechanical expertise smh but would that make THAT much of difference

 

[355190E26]

The right oil does make a difference in these cars. M103 engines need a heavy weight oil, out here in CA 20w-50 is a popular choice.
I always get a laugh out of autozone employees-"Computer says it requires THIS" This is the same computer that will ask whether you have a manual/auto transmission when you just want wiper blades

 

[Betterdaze]

The right oil does make a difference in these cars. M103 engines need a heavy weight oil, out here in CA 20w-50 is a popular choice.
I always get a laugh out of autozone employees-"Computer says it requires THIS" This is the same computer that will ask whether you have a manual/auto transmission when you just want wiper blades

Yeah very annoying, I’ve found with these older cars no one really knows what they’re talking about, not even my local mechanics unless they specialize in MB, that’s why I come to Benzworld!

 

[326218]

You should be using whatever oil is recommended in your owner's manual.

 

[dolucasi]

Those recommendations in practice only last for the first 100K miles or so, once the cars are at 200K miles and worn, one is forced to and recommended to use thicker oil.
Most use 20W50 in california, 15W/40 would be the low end. Anything less just tends to burn oil quickly.

 

[Betterdaze]

I found the cars old maintenance records and 15w40 was the last oil documented I just went with that. I’m in Ohio and have about 114,xxx miles

 

[Crutt]

If you’ve seen my previous post then you may have read that my car had a varnish problem when I first got it. Long story short, cleaned the tank using a siphon pump, new fuel pumps new fuel filter, which got the car running with 0 problems for a few months now but it still has a very rough idle at start up settling down after about 10 seconds.

Just recently got a new EHA and it has reduced the hard start and rough idle significantly although the car still often takes 2 or 3 attempts to start and sometimes it’ll start on the first try. i think my injectors are glazed and sea foam/fuel injector cleaner has not helped much.

Is it possible to pull my injectors and clean them manually by hand? Or would it be better to buy new ones?

Maybe this is normal for these cars and their age? I see many people with, multiple start attempts, hard start and/or rough idle issues but are still able to drive with relatively no problem.

Have you checked the Fuel Pressure Regulator?
I also experienced rough idle at start up settling down after 20-30 secs
[/QUOTE]

 

[Betterdaze]

I finally pulled a couple of my injectors and they look pretty solid no gunk nor corrosión and the rubber seals are intact though a little hardened.

Can someone remind which port on the FD houses the small filter screen?

 

[rockinronnie592]

Use Stabil or equivalent when storing my cars for winter and my snowblower etc. It seems to work as advertised but I dont think it would help to neutralize the effects of ethanol. As far as I know premium gas does not contain ethanol at least in Canada and thats what i use in my 190E.

In regards to Ethanol, I believe it is now a law to have @ least 10% Ethanol in the gas?

 

[ianrandom]

In regards to Ethanol, I believe it is now a law to have @ least 10% Ethanol in the gas?

Where abouts in the world, just to be sure?

Here in the UK we recently moved to 'up to' 10% in standard fuel. Premium fuel is often 'up to' 5% but I use one that has none in it.

 

[rockinronnie592]

Where abouts in the world, just to be sure?

Here in the UK we recently moved to 'up to' 10% in standard fuel. Premium fuel is often 'up to' 5% but I use one that has none in it.

In Canada the government enacted that All gas have 10% Ethanol. Less Ethanol is better for injectors so I put injector cleaner once I have 15, 000 miles on Benz.

 

[ianrandom]

In Canada the government enacted that All gas have 10% Ethanol. Less Ethanol is better for injectors so I put injector cleaner once I have 15, 000 miles on Benz.

Good idea.