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Turbo Technics

"Factory fitted" must mean done by Beaconsfield, surely? As I understand it, MB gave official approval to Beaconsfield's own project to convert the cars. Sadly for Beaconsfield, it turned out to be seriously unprofitable and the originator of the project departed.

If I were you, I'd talk to Beaconsfield (01494 672141), who are MB main dealers under the name Hughes of Beaconsfield Ltd. I've been there to buy parts; there were two other turbos in the customer car-park; I think they still have mechanics there who worked on the originals. They may be able to recommend someone in your locality.

It may be worth changing the plugs to the ones recommended. If it makes no difference, then you have a set of good spares. The TT manual is quite specific about this and other requirements, and they wouldn't be that insistent for the sake of it.

An afterthought: there is also expertise at:

http://www.enginetuner.co.uk/
[email protected]

Run by Alan Jeffrey in Plymouth, it has a rolling road. For what it's worth, he said to me "these are very reliable", referring to the turbo units, about which he is very knowledgeable.

I'm no technical expert, but I have a feeling in my bones that the problem is not located in the turbo system.
 
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when my friend comes round this week ill get him to read all of your replies and im sure it will be superb help in getting it done

thanks peeps
 
Re what Roger stated....get it over to Hughes if you can the workshop manager was originally one of the mechanics that worked on the conversions back in the early 90's, so he still has the knowledge etc.....just don't bank on it being cheap!
 
spark plugs are on order

found that the front anti roll bar had snapped so that being sorted

exhaust will be done tommorow night

and taxed in the morning

getting there
 
Personally I don't think you need lots of ideas of what the fault might be

You need one good mechanic who knows W124s, can fault-find, who understands aftermarket turbo setups, who has the right diagnostic gear, and who is confident he can sort it

You can have as many people as you like look at the car and offer an opinion (or, like us, not look at the car and offer an opinion) but the car won't get sorted until some methodical work is done to isolate the problem(s) and rectify them one by one

Nick Froome
www.w124.co.uk
 
today we (i say we rich did it and i watched) put the exhaust back together and started it up

touch the accelerator and it stalls

did this twice and turned it off

will have the new plugs for friday

if that dont solve it (and it probably wont) im just going to leave it for a while before shooting it
 
got the new spark plugs today "NGK BP6EFS"

weird thing is they are different to the ones that were in there "NGK BCP6ES" and when my mate removed them he said it looked like they were flooded with fuel (not sure what this means and did not ask him)

the old ones had a washed 3/4" from the spark bit and the new ones are a slightly taperd version with no washer !

so they went in ok but we have not started the car up yet just incase anyone here thinks they are wrong

reading through the turbo technics info they did a report and noted that their might be a problem and said its probaby 1 of 2 sensors but they could not computer diagnose which as their computer was not compatable with my car

either

Cam Sensor or Knock Sensor

would eithe rof these cause th issue along with the wrong plugs as last time we tried it a week ago with the old plugs still in it as soon as you touched the accelerator the car stalled

so a list of things we have recently changed

used correct high octane fuel
used injector cleaner mixed in with 40 litres of fuel
changed the spark plugs to the ones mentioned on page 1
removed the cat as it was nackerd (now no cat)
 
The G.F.P said:
got the new spark plugs today "NGK BP6EFS"

weird thing is they are different to the ones that were in there "NGK BCP6ES" and when my mate removed them he said it looked like they were flooded with fuel (not sure what this means and did not ask him)

the old ones had a washed 3/4" from the spark bit and the new ones are a slightly taperd version with no washer !
Click to expand...

Your car should use BCP6E with alternative BCP6ES.
You have the version with taper seat and no Crush washer, which is incorrect.

http://www.ngkpartfinder.co.uk/car_commercial_extra.php?id=6269

They won't cause damage short term but are not seating properly so fit the corrct ones.

I'm fairly confident the plugs are not the problem. It sounds like it's flooding at low revs.

The cam timing actuator might cause some bogging down but yours sounds more extreme than that. Disconect it so it sits in the relaxed state and see if there is a difference. I doubt the knock sensor is retarding the timing that far.
 
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This is new information.

but the car is very very lumpy from launch to about 2,000 revs

it judders then kicks into life

That sounds like the spark may be overcome. Check the power of the HT output with a flash tester.
 
"Your car should use BCP6E with alternative BCP6ES."

This may well be correct, but what does it say in your Turbo Technics manual, GFP?

If my previous post misled you and the new plugs are wrong, I'll buy them from you. But check your Turbo Technics manual.
 
I agree with you about the heat range, maybe swapping to BCP4E might be better, but I can't see the fitting of a turbo kit altering the plug seats from crush washer to tapered seat.
That would take machining which isn't done with this kit is it.?
 
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I don't doubt your well informed comment, Dieselman, and agree that re-machining seems unlikely. It's just that the TT recommendation for plugs in the 300 engine differs from that on the NGK site (I know we're talking about the 320 here).
 
It might well be that the engine might benefit from a cooler range of plugs for long term longevity but this is going to exacerbate any starting/running from cold situation.It sounds as if the engine is getting fuel OK from the wet plugs but the ignition system is failing to supply an adequate spark at low revs. MARK300Sl,s point about the INLET manifold Hobb's switch which directly reflects the ignition timing is a good one, How this works in M104 engine I don't know?? This is assuming the TT conversion uses ignition retard rather than extra fuelling at boost in the m104 engine? this from the mercedes shop thread:-

The Hobbs switch simple opens the circuit on the EZL which retards the timing.
This is the "Achilles Heel " of the original TT fuel enrichment system.
TT retards the timing because they couldn't enrich enough under boost.
The switch opens between 0.09 - .11 bar ( 1.32 - 1.62 psi )
So retard comes in at beginning boost.
Timing retard = power loss

Max boost is measured at 3000 rpm and should be .47 - .5 bar ( 6.91 - 7.35 psi )
The R16 resistor is fixed and primarily on USA cars.
Most Euro cars have an adjustable EZL trim setting plug which TT requires to be set at "S" for non catalyst and "1" for catalyst.
I removed the fixed R16 from my USA car which gives a bit more advance.
Not noticeable on a NA engine, but appears to give a bit more

might be interesting to monitor the ignition timing with a strobe light to see what happens to the ignition timing off and on boost-- thats if there are timing marks on the crank pulley.
 
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Roger Jones said:
"Your car should use BCP6E with alternative BCP6ES."

This may well be correct, but what does it say in your Turbo Technics manual, GFP?

If my previous post misled you and the new plugs are wrong, I'll buy them from you. But check your Turbo Technics manual.
Click to expand...


no problem as my mate is a mechanic i got them for £13!

cant argue at that

very very good of you to offer to buy them

actually are you offering as you feel you told me to get the wrong ones or becaus you can use them?

not got a manuall just a print up of how the parts were added & installed
 
just read all your post

cheers guys and ill get the turbo mate to read all this when he come around to see it

and yes the plugs were flooded when he took them out
 
bought the plugs with no S on the end and they are apparantly still washer less?

can this be the case?

or have they accidently orderd the last ones again?
 
The G.F.P said:
Without making me suicidal why does nearly every single person who has anything to do with mercedes (main dealers, indy mechanics, enthusiats, the milk man & paperboy) hate the car and refuse to have anything to do with it

infact turbo technics themselfs shun me when i offerd to throw cash at them to get the beat running

0-60 in under 5 seconds & tickles 155mph all day long (so ive read)

im off to slam my man vedg in the fridge door in preperation for the replies
Click to expand...
Were you "on the drink" when you posted this ?
 
Looks like you got BP6EF instead of BCP6E. The C denotes crush washer.
 
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