power loss

[crash406]

i have a e300td it has no power at all , the usual culprits have been changed ie:fuel and pre filter,filter in the tank and air filter but to no avail,round town seams ok if you hit a hill it loses power rapid and you could have your foot to the floor, on a very slight down hill slope it picks quickly up , is this a figment of my imaginnation. but overall its a slow barge.

 

[ManJ]

How many of us are gona say MAF???

 

[Ian B Walker]

How many of us are gona say MAF???

Non probably as its a diesel

 

[ckember]

could be the MAF or the pressure rail sensors or a pressure leak or the turbo or the injectors.

 

[blue190]

I would suggest a build up of gunk around the fuel pick up causing fuel starvation when engine needs it. Had same symptoms on my tractor at work last year and had to blow back down fuel pipe from filter with an airline to blow the 'stuff' away from the tank end. I might be talking rubbish here but its worth a try and is a cheap fix if it works.

 

[gazz]

E300 is not common rail, so rail sensors unlikely. MAF is a possible. Check for whistling from the front. Split intercooler/pipes are common on these. Symptoms hint that it is low on boost pressure.

 

[GazCaff]

Non probably as its a diesel

Ian, [whisper] 210 E300 TDs do have MAFS [/whisper]

I wonder if one of the inlet hoses has blown off? Do the six pots have a MAP sensor?

 

[Ian B Walker]

Thanks Gareth, just re read the initial post. its a 210 not a 124 its the E's in the wrong place

 

[BlackC55]

Try the vacuum transducer or a vacuum leak from the turbo's actuator. Another common cause.

 

[Dieselman]

Split intercooler/pipes are common on these. Symptoms hint that it is low on boost pressure.

Your assumption of the condition sounds possibly correct but split intercooler pipes is never going to happen on a E300TD as they are made of aluminium as opposed to plastic of the CDI engined cars.
Pre 1998 there was a tendency for the connection hoses to blow off as the spigot had no flange but this was modified to stop this happening.

My guess goes with possible MAF failure (although it sounds a bit severe) or turbo not being actuated.
As BlackC55 has said check the vacuum transducer for the turbo wastegate.
You should be able to see the wastegate linkage being pulled when you start the car and even when idleing.

Try swapping it with the one for the EGR valve as they are the same unit.

Also if the EGR valve fails the ECU will drop the turbo as it goes into limp home mode.

You can measure the output of the MAF with a digital multi-meter and it should produce about 4.8v when the engine is at high revs under load. Use Pin5 of the MAF against Gnd.

Boost pressure can be measured with a dial type tyre pressure guage or another guage that reads upto 20 psi. Boost should be 1Bar or 14.5 psi.

 

[gazz]

have had a few where the pipe that comes off the intercooler outlet up to manifold has dropped away. It seems the little brackets on the pipe fracture with age, particularly if some ham-fist has yanked on the manifold when getting at glowplugs, without realising there is a bolt under there!!

 

[Dieselman]

have had a few where the pipe that comes off the intercooler outlet up to manifold has dropped away. It seems the little brackets on the pipe fracture with age, particularly if some ham-fist has yanked on the manifold when getting at glowplugs, without realising there is a bolt under there!!

Almost certainly poor work in the past. The bracket shouldn't fracture unless the bottom bracket isn't bolted up to the engine.

 

[crash406]

hi thanks to all , seems like i have a new car maf was blocked up ?? well shows this site works thanks again..

 

[Dieselman]

Do the six pots have a MAP sensor?

Yes.