Had a busy day diagnosing and fixing faults

Discuss, ask, or get help with engine and mechanical queries in here.

Moderator: Moderators

TopDonkey
2.0 16v
Posts: 157
Joined: Sat Nov 21, 2009 6:07 pm

Had a busy day diagnosing and fixing faults

Post by TopDonkey »

Bought my car a few days ago as spares or repair off ebay as it was smoking like a chimney and there were loads of warnings coming up on the mfd and loads of boost for 2 seconds then it went into limp limiting me to 2750rpm and no boost at all till it turned off and on again.

First problem i spotted was that the lower intercooler hose had a huge split in it, replaced this and it was a lot better, but after 5-10 seconds at full boost going up hills, the turbo would cut out again, and i would enter limp mode again, and i was still smoking slightly under partial throttle.

First thing i did was to blank the EGR on the inlet manifold side, made up a 1.5mm galvanised steel blanking gasket, and whilst i was there, i disconnected and blanked the dozer valve actuator (mechanically, not electrically), these 2 things seemed to sort out the smoking and made the car run a lot better, but after 10 seconds, the boost was still cutting out and going into limp mode, so i decided to swapout the boost sensor with my 806 when i discovered that the pipe linking the boost sensor to the intercooler wasnt there, and someone had screwed a screw into the intercooler takeoff as well !!

So i made up a plastic pipe that was a tight interference fit into the intercooler takoff hole, roughed it up and araldited it in, then used the rubber pipe i had taken off the dozer valve to reconnect the boost sensor, took it out for a 20 minute drive, and its like driving a new car !, runs moch smoother, resonds instantly to the throttle, and can sustain fill boost for 30 seconds plus (i didnt want to go faster than that!).

My engine light is still on, but i believe that this should go out after 20 succesfull stop starts ?

So a busy afternoon for me, and got it all finished just before it got dark !

got a 400 mile drive tomorrow to do in it, that should give it a really good test :)
User avatar
mjb
Site Admin
Posts: 7983
Joined: Wed May 31, 2006 9:06 pm
Location: Stoke

Re: Had a busy day diagnosing and fixing faults

Post by mjb »

Awesome work!
TopDonkey wrote:My engine light is still on, but i believe that this should go out after 20 succesfull stop starts ?
Don't know about that one, it may need a diag tool plugging in to clear any stored "permanent" faults.
<steve_earwig> I think this forum is more about keeping our cars going with minimal outlay than giving our cars more reason to go bang
adam03031980
2.0 Turbo
Posts: 442
Joined: Wed Nov 08, 2006 8:53 pm
Location: deeping st james

Re: Had a busy day diagnosing and fixing faults

Post by adam03031980 »

Cant you clear the faults usually if you remove the battery leads for about 20 minutes thats what i did on mine and it seemed to sort itself out maybe it was just a fluke with me.
TopDonkey
2.0 16v
Posts: 157
Joined: Sat Nov 21, 2009 6:07 pm

Re: Had a busy day diagnosing and fixing faults

Post by TopDonkey »

I've just driven 70 miles and discovered 1 more fault !, the engine temp is apparently stone cold all the time, so i am thinking that the temperature sender is faulty ?, or does the 406 have a history or faulty dash guages ?

I would clear the fault with my diag scanner, but i cant find it at the moment, i havent used it for about 4 months and it has gone walkies !

but the car drives perfectly fine at the moment, and i have lots of miles to do tomorrow to test it
User avatar
Doggy
Mod with a 2.2 HDi, De-Fapped!
Posts: 10710
Joined: Mon Oct 13, 2008 11:49 pm
Location: Northants

Re: Had a busy day diagnosing and fixing faults

Post by Doggy »

Which engine have you got, TD?
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
TopDonkey
2.0 16v
Posts: 157
Joined: Sat Nov 21, 2009 6:07 pm

Re: Had a busy day diagnosing and fixing faults

Post by TopDonkey »

Its the HDI 110, I have 3 vacuum solenoids on the firewall, so think i have fap, but not 100% sure about that yet
User avatar
Doggy
Mod with a 2.2 HDi, De-Fapped!
Posts: 10710
Joined: Mon Oct 13, 2008 11:49 pm
Location: Northants

Re: Had a busy day diagnosing and fixing faults

Post by Doggy »

No, I don't think you'll have a FAP. 8)

AFAIK it's only 2.2 HDi's that are cursed in this way. :x

Good work so far - keep us posted on progress.
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
TopDonkey
2.0 16v
Posts: 157
Joined: Sat Nov 21, 2009 6:07 pm

Re: Had a busy day diagnosing and fixing faults

Post by TopDonkey »

Next problem has come up

The cooling fans dont cut in at all !, driving through london wasnt fun with the heater on full blast to try and keep the engine cool enough

Does anyone know of any particular weaknesses or problems with the cooling fans ?

I'm not working tomorrow, so will be investigating it tomorrow afternoon

The engine light cleared itself after 5 stop starts of the engine, so didnt need clearing with a diag tool

Thanks
teamster1975
Site Admin & Mad Biker!
Posts: 6277
Joined: Sun Oct 28, 2007 8:07 pm
Location: Woking, Surrey

Re: Had a busy day diagnosing and fixing faults

Post by teamster1975 »

The relays are a favourite for duff fans; either that or the fans themselves.
I'll dig out steve_earwig's howto...

Edit: Troubleshooting list, good read
1996 406 1.8LX Got a bad case of hydro lock!
1996 406 Executive 2.0 Turbo XU10J2TE No longer hangin' on in there :(
1997 Honda CB500V
2003 Volvo V40 1.8 GDi SE killed by a nutter in a beemer 5 series
2008 Mondeo 2.0 TDCi Titanium X

"Always look on the bright side of life, dedo, dedo dedodedo"
TopDonkey
2.0 16v
Posts: 157
Joined: Sat Nov 21, 2009 6:07 pm

Re: Had a busy day diagnosing and fixing faults

Post by TopDonkey »

Nice one, thanks very much, thats exactly what i needed, i will be fixing mine tomorrow now
User avatar
steve_earwig
Moderator
Posts: 19813
Joined: Thu Oct 04, 2007 6:09 pm
Location: Jastrebarsko, Croatia http://www.jastrebarsko.hr/lokacija/

Re: Had a busy day diagnosing and fixing faults

Post by steve_earwig »

Is that fans as in two of the beggars?
Unskilled meddling sin©e 2007

The submitted form was invalid. Try submitting again.
teamster1975
Site Admin & Mad Biker!
Posts: 6277
Joined: Sun Oct 28, 2007 8:07 pm
Location: Woking, Surrey

Re: Had a busy day diagnosing and fixing faults

Post by teamster1975 »

Hey Steve, I couldn't find your post on rad fan diagnosis, can you post a link please & I'll put it in the knowledge base :)
1996 406 1.8LX Got a bad case of hydro lock!
1996 406 Executive 2.0 Turbo XU10J2TE No longer hangin' on in there :(
1997 Honda CB500V
2003 Volvo V40 1.8 GDi SE killed by a nutter in a beemer 5 series
2008 Mondeo 2.0 TDCi Titanium X

"Always look on the bright side of life, dedo, dedo dedodedo"
TopDonkey
2.0 16v
Posts: 157
Joined: Sat Nov 21, 2009 6:07 pm

Re: Had a busy day diagnosing and fixing faults

Post by TopDonkey »

I havent checked to see how many fan(s) i have yet, the wife is forcing me to do some housework this morning, so i wont be able to look at it till after lunch :x
User avatar
steve_earwig
Moderator
Posts: 19813
Joined: Thu Oct 04, 2007 6:09 pm
Location: Jastrebarsko, Croatia http://www.jastrebarsko.hr/lokacija/

Re: Had a busy day diagnosing and fixing faults

Post by steve_earwig »

I did a post on fan diagnosis? I'm afraid those neurons must have long since popped off :oops: I do remember doing one on how to change the b*ggers but then someone else came along with a much simpler way of doing it :(

Hold on TD, so while you're doing your Mrs. Mop routine what your other half doing? Perhaps you should "accidentally" throw your tv out the window while you're dusting it...
Unskilled meddling sin©e 2007

The submitted form was invalid. Try submitting again.
teamster1975
Site Admin & Mad Biker!
Posts: 6277
Joined: Sun Oct 28, 2007 8:07 pm
Location: Woking, Surrey

Re: Had a busy day diagnosing and fixing faults

Post by teamster1975 »

Funny you should both say that, I've just swept up & mopped the floor (my wife's time of the month arrived today, I'm collecting brownie points :supafrisk: :supafrisk: )
1996 406 1.8LX Got a bad case of hydro lock!
1996 406 Executive 2.0 Turbo XU10J2TE No longer hangin' on in there :(
1997 Honda CB500V
2003 Volvo V40 1.8 GDi SE killed by a nutter in a beemer 5 series
2008 Mondeo 2.0 TDCi Titanium X

"Always look on the bright side of life, dedo, dedo dedodedo"
Post Reply