clutch could be slipping or the turbo not kicking in? Trip to a mechanic anyway
If its a Diesel engine, it could the Heat Plugs - just had mine done and it starts like a dream! hope this helps.
it could be a leaking vacuum hose at the carb/throttle body or inlet manifold or associatedhoses also cheak air filter replace if dirty
It could be that the diesel fuel injectors have failed that is why you are getting low pressure on your engine. I actually found it to be the fuel rail inector pipes were loose and I put new rubber hoses on also. Problem fixed
There could be many reasons why the vehicle won't start. The battery could be drained, there may not be connection on the battery post, there may not be a spark between the spark plugs, the starter could be going bad, or the solenoid may need to be replaced.
Fuel is not good!
Could be in need of a tune up.
Assuming that you are enquiring about Peugeot models carrying the HDI designation, the answer is yes, because they are diesel engines. Nearly all diesel engines used in modern cars are turbodiesels because that is the only way to make them perform in a manner to compete with a petrol engined model. A normally-aspirated diesel could really only be used on commercial vehicles, and most of these are now turbodiesels too.
Could be in need of a tune up.
One could find a Peugeot 607 for sale at Auto Trader. There are many Peugeot 607's which are listed. One could also inquire at a used car dealer. There are also Peugeot vehicles for sale on various Kijiji sites.
Its speed could grow or shrink, or the direction in which it's moving could change.
Could be worn transmission and/or motor mounts. Could be a worn driveline.
You could look at used car lots to find a 1999 Peugeot. You could also look in used car magazines and in the classified section of newspapers.