82 mb 380sec starting proablem - PeachParts Mercedes-Benz Forum

bosanci28 · #1 12-03-2008, 07:51 PM

well i have the 1982 mb 380sec
in the morninig it starts okaythen i go to school about 20 miles ,,i get there i turn engine off,,and if i come in about 30-40 minutes the car does not want to start anymore from the first try ,,like half key when is turned! and i try the secound time ,,and the engine turns about 10-15 times intill it starts,,and at first runs rughf intill i press the gas pedal feww times then comebacks to normal,,
what the proablem,may be?,when the engine is cold starts okay,,when is hot starts hard?,,

thanks

mbdoc · #2 12-04-2008, 08:30 AM

Most likely fuel pressure bleed-off.
Common issue on CIS cars. Fuel pump check valve, fuel pressure accumulator, or fuel pressure regulator o-ring are the most common problems.

OF course the secondary ignition MUST be in good condition!

bosanci28 · #3 12-04-2008, 09:38 AM

what do you mean " OF course the secondary ignition MUST be in good condition!""

thanks

mbdoc · #4 12-04-2008, 11:22 AM

Dist cap, rotor, wires, & coil.

Low secondary ignition voltage will cause hard starting with a HOT engine just like a lack of fuel.

bosanci28 · #5 12-04-2008, 06:23 PM

Quote:

Originally Posted by M.B.DOC

Dist cap, rotor, wires, & coil.

Low secondary ignition voltage will cause hard starting with a HOT engine just like a lack of fuel.

the low secoundary ign. is this one?
the black one from left?

thanks

bosanci28 · #6 12-04-2008, 06:32 PM

Quote:

Originally Posted by M.B.DOC

Most likely fuel pressure bleed-off.
Common issue on CIS cars. Fuel pump check valve, fuel pressure accumulator, or fuel pressure regulator o-ring are the most common problems.

OF course the secondary ignition MUST be in good condition!

so the fuel pump check valve is it in here

fuel pressure accumulator

and the fuel pressure regulator o-ring ?

im trying to find out where all this are located
if can point me in the right direction
thanks

bosanci28 · #7 12-06-2008, 12:50 AM

Quote:

Originally Posted by M.B.DOC

Dist cap, rotor, wires, & coil.

Low secondary ignition voltage will cause hard starting with a HOT engine just like a lack of fuel.

it should be this one the check valve

and
the pressure accumulator i dont know where this one is

and the pressure regulator ,i know that this is next to fuel distribuitor ,,i did check --a vacum test-- and it was fine

what o ring you talking about?,, because this is one pieces?

thanks

t walgamuth · #8 12-06-2008, 05:44 AM

When I first got my 500SEC I chased this problem for months, spending probably nearly a thou on parts and labor at my indie, changing dist cap, wires, plugs and other things.

One day I was griping about it to an older gent who had made his living working on benzes when this car was new, and he said....."always push the gas pedal down about half way on startup on those cars".

I did that and also developed the habit of never shutting the car off when going into the village pantry to get a news paper or such and lived happily ever after. It was bleeding fuel into the intake on shutoff and when you restarted it the fuel would make it run rich and stumble until you revved the engine up and blew it out.

I never fixed the problem but it never got worse either. I drove the car sixty thousand miles that way. It ran strongly and smoothly in every other way.

bosanci28 · #9 12-06-2008, 09:51 AM

Quote:

Originally Posted by t walgamuth

When I first got my 500SEC I chased this problem for months, spending probably nearly a thou on parts and labor at my indie, changing dist cap, wires, plugs and other things.

One day I was griping about it to an older gent who had made his living working on benzes when this car was new, and he said....."always push the gas pedal down about half way on startup on those cars".

I did that and also developed the habit of never shutting the car off when going into the village pantry to get a news paper or such and lived happily ever after. It was bleeding fuel into the intake on shutoff and when you restarted it the fuel would make it run rich and stumble until you revved the engine up and blew it out.

I never fixed the problem but it never got worse either. I drove the car sixty thousand miles that way. It ran strongly and smoothly in every other way.

yes,i know,,but i cant live the car like that ,,because i need the smog to get my dmv sticker,,and it fail smog 3 times,,last time i took the car to one of my friend shop and he put it on a smog machine he adjusted to pass smog at 15 and 25 miles ,,but the proablem was ,if he took his foot of the gas padel the car will die,, will not stay at idle if he needs to go bellow to adjust the fuel mixture ,,so i just dont know man,im just changing some staff here in there,,im not working right now,,and money ,you know...

Benz Mercedes · #10 12-06-2008, 03:21 PM

Does it look like it has the original, or an old Warm Up Regulator? My original WUR on my 380 lasted 22 years and then it started to have warm start issues until I replaced it. I'm not saying that's your problem, but if soon, it becomes very hard to start when warm, I would suspect it to be faulty.

Ben

t walgamuth · #11 12-06-2008, 04:01 PM

We don't have emission checks in INdiana.

bosanci28 · #12 12-09-2008, 02:06 PM

well im in california,,and you can not get a way with out smoging the vechile here,,,