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+--- Forum: DW10 HDi section (https://www.306oc.co.uk/forum/forumdisplay.php?fid=10)
+--- Thread: HDI Power Loss (/showthread.php?tid=28540)
HDI Power Loss - daveygravey - 02-01-2015
A few weeks back my 306 HDI felt sluggish at low RPM and then picked up a bit around 2500-3000. The car also has a pro_steve remap stage 1 (been on for a while and really transformed the car - cheers steve)
I got it into the garage to take a look. I saw some oil on the inlet elbow (boost leak) and then I found what I thought was the culprit:
[attachment=20891]
[attachment=20892]
yes, it looks like the car tried to ingest the air filter!
...But after cleaning and re-sealing the inlet elbow + EGR blank (while I was there) and fitting a new air filter today the car feels exactly the same.
I've tried disconnecting the MAF and the car feels even more bogged down when you accelerate.
I've read the ECU errors and apart from the MAF error P0100 (when I disconnected) there is only a glow plug error P0380.
I'm running out of ideas...
Could the MAF still be knackered but not producing an error?
Could the EGR valve be stuck or does that not matter anymore since I blanked it?
Something more serious?
Dave
RE: HDI Power Loss - Paul_13 - 02-01-2015
Lift pump in the tank blocked?
I wrote a guide the other day on this
RE: HDI Power Loss - Toms306 - 02-01-2015
Lol, might wanna change the filter more often!
It shouldn't be the MAF if it feels worse with MAF unplugged. EGR leak wont make any difference after its been blanked.
Could be FPR related.
RE: HDI Power Loss - daveygravey - 02-01-2015
The engine starts and runs absolutely fine - just lacking in the power department. i've had a quick look at lift pump and fuel pressure but these appear to be related to starting and continuing to run?. It's safe to drive but I won't be overtaking anything but a milkfloat.
RE: HDI Power Loss - Paul_13 - 03-01-2015
If it's running on its definitely the fuel pressure regulator at fault. I had this exact same problem and a new fuel pressure regulator sorted it
RE: HDI Power Loss - daveygravey - 03-01-2015
(03-01-2015, 08:43 AM)Paul_13 Wrote: If it's running on its definitely the fuel pressure regulator at fault. I had this exact same problem and a new fuel pressure regulator sorted it
Hi Paul - thanks but no it's not overrunning - just lacking power.
RE: HDI Power Loss - Paul_13 - 03-01-2015
Whoops my bad. Skim reading again
Read it throughly and it makes sense now
RE: HDI Power Loss - madmadmax - 04-01-2015
when did it last get a fuel filter change?
RE: HDI Power Loss - Poodle - 05-01-2015
Do you still have the air-doser assembly attached? Sack off the butterfly out of that if not.
RE: HDI Power Loss - Paul_13 - 05-01-2015
Where is the butterfly located?
RE: HDI Power Loss - DeeTurbo - 05-01-2015
If it's a 3 plug ecu it'll have the doser and it'll be at the bottom of the elbow. Remove the elbow and take the shaft and butterfly out if it has one.
RE: HDI Power Loss - Poodle - 06-01-2015
Some of the single plug ecu engines have it too, otherwise as above.
RE: HDI Power Loss - daveygravey - 07-01-2015
No, mine's not got an air doser (it's an early HDI - 1999)
RE: HDI Power Loss - Poodle - 07-01-2015
What happens if you rev it all the way out, does it pick up later on?