68000miles,there are no lights on dash ,the car has small amount of power at low revs ,will not rev much above 2000rpm, then does it very slowly no increase in power.had this on previous citroen when turbo was not boosting engine.not jerky just very little power ,will reach about 40mph on the level through gears.
bought vehicle last year with 52000 on clock had it serviced after purchase,correct oil used as far as I know,can't gtee that.serevice due shortly.
My neighbour is a mechanic ,he plugged in diagnostic gadget,when he gets back I can tell you fault codes,the last one I remember was wrong throttle position or something ,will let you know numbers asap.
car will work fine most of the time if I leave it switched off for a while.possibly the fault happens after higher sustained engine revs.
Hi there , Good evening to you ,
Ok as your fault is intermitenet it is a bit more difficult to diaganose
from your description i would supsect a faulty boost vacuum regulator as this is quite common on these engines , basically this regulator is supplied with a vacuum from the vacuum pump and then is actuated by the PCM to send a certain amount of vacuum to the turbo vane actuator these can stick internally and cause no vacuum to be supplied to the turbo , this regulator is located at the rear of the engine block
also inspect the vacuum pipe that runs from this actuator to the turbo
what i have seen several times is the rubber /pipe connection at the turbo becomes swelt/swollen usally due to a cracked intercooler pipe ( hairline crack at the weld )
this sprays oil onto the turbo vacuum hose and contaminates the end pipe resulting in intermitinent boost issues ( this needs to be a nice tight fit onto the turbo )
these engines are also prone for turbo failures or turbo variable vane actuators sticking when hot ( caused by carbon build up on the internal vanes )
again this could cause your issue
these 1.6 dv6 engines produce a lot of soot and this can also lead to turbos sticking due to contamination of the vanes
other issues which cannot be overlooked are PCM software updates ( through fords IDS laptop )
as if the parameters of eg, boost sensor are out of limits then no vacuum will be appilied to the turbo
usally when i have a fault like yours in my dealership i carry out a fault code checktake note of the codes then clear them and road test the vehicle extensively until the fault arises again then re-check the codes and work from there
the usall code is p0299 -turbo underboot which can be caused by all of the above issues i spoke of
if you need anymore help or advice on this issue please let me know
if you are completlety satisfied with my answer/advice PLEASE CLICK ACCEPT
Kind regards XXXXX XXXXX and have a nice evening
Hi Brian.Having great difficulty trying to reply to your messages,thanks for reply.
code p0299 does come up as turbo under boost. ,if I turn the engine off for 3 minutes it usually starts and runs for a while. sometimes if revs are kept up it will get me home,sometimes it cuts the turbo boost again, just had yellow engine light come on and stay on ,did odd thing this morning ,cooling fan started with a cold engine .where do I start.are these engine induction cleaning processes,like the one BG offer any good.
hi Brian , good evening,sorry to drag this one,
I have had conflicting reports of fault p0299.
took car to local garage and they showed me that the code was mechanical fault in the turbo , the gararge suggested that the turbo was busted and should be replaced ,I disagree because when I restart the car the turbo can work perfectly until I slow down to low revs for a time.
Do you know what the correct diagnosis for the code is?
They have said that they need to do a smoke test on the induction system to see if there is a leek anywhere,should I ask for a rolling test? if they can,t do it maybe I should take it to a ford garage,trouble with main dealers is that they cost twice as much and currently between jobs things are a bit tight,but I need a car,so any suggestions.many thanks again