Search found 118 matches

by exec406
Sat Dec 22, 2018 6:00 pm
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Changed the swirl flap diaghpram and that improved things a bit in terms of no smoke. Still getting flat spots. One other part I am looking at that may be the issue is part no. 1920.GH - intake manifold pressure sensor. Is it worth changing that?
by exec406
Fri Nov 16, 2018 9:18 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Hi

Interesting what you say there about cold air getting to the engine as at 60mph plus (colder air being presented to the engine) there are no flat spots, but at lower speeds there is.
by exec406
Thu Nov 15, 2018 8:26 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Hi

No fault codes appear when the engine flat spots.

Thanks
by exec406
Wed Nov 14, 2018 7:11 pm
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Smoke test on the vacuum system turned out fine. Garage did some further diagnostics and noted a wiring issue near the turbo / wastegate. A wiring repair was done in the past and it appears this was not done that great back then. The wiring repair done by the current garage made no difference and en...
by exec406
Mon Nov 05, 2018 6:50 pm
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Garage is going to do a smoke test to check for boost leaks.
by exec406
Sat Nov 03, 2018 10:21 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Indeed, this engine has the most torque of all the engines used in the 406 - 314 N⋅m (232 lb⋅ft) / 2000rpm.
by exec406
Sat Nov 03, 2018 10:10 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Hi Not sure if the EGR is blanked - will get that checked. Garage think it could be a wastegate issue on the turbo but I mentioned there's no wastegate on that one (2.2 DW12 - ECU controlled turbo) They thought car was to old for that (non wastegate turbo) but the 2.2hdi was one of the latest engine...
by exec406
Sat Nov 03, 2018 8:37 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Hi Garage think the turbo may be at fault, so having it removed for an inspection. Even tried fitting a new Swirl Flap EV. Car drove OK for a short while at speed after new Swirl Flap install then it flat spotted again. It was mentioned to me a couple of years ago that the engine note was indicative...
by exec406
Wed Oct 31, 2018 5:30 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Hi

Not local but will ask them to try that.

Is the swirl solenoid part number 1628.CH?

Found the thread below from a few years ago about the DW12 Vac system.

http://www.406oc.co.uk/viewtopic.php?t=21527

Thanks
by exec406
Tue Oct 30, 2018 7:41 pm
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Boost solenoid replacement made no difference, still being looked into...
by exec406
Tue Oct 30, 2018 6:24 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Hi

Now getting a boost solenoid fitted - is that one of those that is on the bulkhead? This is a different part to the electrovalve 1628.LQ just fitted.

Thanks
by exec406
Sat Oct 27, 2018 10:40 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Hi

Connections checked to new electrovalve (1628LQ) and OK. Still getting the flat spots on acceleration.

Could a faulty unit be causing this? I wasn't getting this happening with the old one fitted.

Thanks
by exec406
Sun Oct 21, 2018 11:17 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Hi

Thanks for the info, appreciated.
by exec406
Sat Oct 20, 2018 6:34 pm
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Hi I got the 1628LQ Airbox electrovalve fitted and now I'm getting a new issue that I didn't get with the old one (the previous one had one of the two small plastic pipes broken, and was causing (I think) limp mode at over 50mph constant. With the new part fitted, I'm getting some sort of 'turbo lag...
by exec406
Sat Oct 06, 2018 11:06 am
Forum: Engine, Clutch and Transmission
Topic: N75 valve on 2.2 DW12 2.2 HDi engine
Replies: 37
Views: 2426

Re: N75 valve on 2.2 DW12 2.2 HDi engine

Thanks, the issue with the valve was identified when I was getting the coolant temperature sensor changed. Basically on occasion, I lose acceleration / power (limp mode) at about 55mph plus. It will then come back to normal when at lower speeds. Issue also happens occasionally when turbo wants to co...