I brought it just over 2 years ago and it was my second pug ( the first being a 1.9 td 306) i went for a 406 2.0 hdi because i needed it to tow a caravan, when i picked it up all was good it drove well no knocks, bangs or clunks and seemed to have power well on par with my 306 anyway. So first trip with the caravan and thats when the problem started yep under load mil light on limp home mode !! made it to the camp site fortunatley not far and parked up left it over night ( it was dark when we arrived ) but the next day it was ok , no light and no problems that was 18 months ago and i have been chasing myself in circles ever since and despite being an hgv mechanic i have reached the end of my ideas and my teather if i'm honest.
So the current problem is as follows: over the past 3-4 months in an effort to cure it's woes ready to tow again this year i have : Checked all the vaccum hoses and pipe work both visually and with a vacuum tester, checked the vacuum on both egr and waste gate control valves and the ohms resistance (one good one bad) changed the bad one.
Next removed the bottom intercooler pipe to check for oil misting from the turbo as suggested else where on this forum quite a bite of oil was found !! ahh i thought pipes off, intercooler out, good proper clean job done.. nope still has ittermitant mil light but no limp mode just down on power.
Removed and cleaned the EGR valve, not really that bad but hey now i was getting desperate. Result no real difference.
Investigated why i was getting oil in the bottom pipe and now by this stage top pipe and the intake manifold.. Yep you guessed it failed turbo oil seal. No smoke as oil was weeping into the inlet side not the exhaust side, when i took the top pipe off the inlet was thick with oil sludge That's not going to help !!! So a weekend spent removing old turbo, pipe work, intercooler, inlet ect cleaning all pipework inlet AGAIN.. replaced turbo with a secondhand unit with a 12 month warranty complete with manifold and egr valve (which i tested before it went on. all good) reasembled with all new gaskets primed turbo with oil and all done. Result ahh better but still down on power but no mil light.
Ok getting somewhere, spoke to a mate who worked on pugs as a young man and still had a mate who was now a senior tech at a peugeot main dealer who suggested looking at the MAF sensor as the could give the symptoms, lack of power, slow to rev and loss of power under load. took it to a garage for a full code read (my OBD 2 hand held just wasn't going to be up to this one !!) various codes found including the normal glow plug after heat ect but also several relating to the MAF could be because it had been unplugged so many times. reset and cleared the codes and started her up.. glow plug again, but also airflow code that'll be the mass air flow he said..
OK ordered and fitted new MAF OE part from a uk based company, That was last night. Took her for a run Mil light on, but power was back and she pulled really well. All was good with the world
Even better this morning started up, No MIL light and drove great to work, it's so nice not having to change to 3rd to get up any slight climb. My life was great car fixed, sun shining, and best of all wife of my case about wether " That heap will tow the caravan this weekend" On the way to work i get a phone call, i'm not needed, no vehicle available for me to use ( perk of being an agency driver i assume lol) so i carry on the last 5 mile to get my paperwork signed "you booked me, you pay me !!" Grab a coffee and set of home. 4-5 miles into my journey climbing a slight hill and suddenly massive loss of power accompanied by a hell of a knocking and runnning really rough, NO NO NO NO NO check the mirror, cloud of sooty smoke, browny grey not black or white and no throttle response. Limped it up to the flat. turned her off sharpish and lept out and opened the bonnet expecting to find all sorts of carnage....and well nothing really, all appears well. Pipes, plugs and hoses are where they are supposed to be. Checked oil level, spot on the money. Ok what the hell?? fingers crossed turned the key and well nothing really bad ?? but now the revs climb to about 1500-1800 rpm with out me doing anything and operating the throttle either by pedal or by hand under the bonnet has any effect. diconnected the MAF. no effect
OK so i limped it home, pulls well enough as it made it home just on high tickover with me just using the gears to control the speed. Straight to the garage who read the codes last time and showed him the problem.. Head scraching, chin rubbing erm ?? plug in the snap on diagnostic box and this what we get... P1404
P0100
P1614
P0221
P0121
P0236
P0190
OMG what is happening here i've gone from 3 codes and problem solved to mechanical armageddon and more codes than you can shake a stick at in the space of 24 hrs
So guys that is my problem the guy at the garage have not got a clue !! I am running (well truth be told have run out) of money to through at it and would really really appriciated any help or advice you kind folk can offer, as i'm sure will my wife and kids who at the moment look like they have just lost their bank holiday away in the caravan !!!! And i have to tell her when she gets home from work
Many thanks in advance Dave.
