XDL's - Bouncy idle: after cooling fan has finished - at end of video.
Live Data: general screens data

Screen shot - error codes

Hi I've adjusted the fuel pressure reg while engine is idling. It's now adjusted to the suggested pressure about 34psi running. I think there's still some issue, maybe vacumm or idle air control related? Idle seems to do the wave every now and again (idle up and back again). Will take a screen shot ...

Also, is there a way to use a vacumm bleeder to hook to the reg vac port to act as vacumm.

Ok, some good learning here for me.
So, do the injectors get 43.5psi at first start, then it gets regulated to 33 odd psi afterwards?

Could I adjust it to 33 psi manually, to see how it acts?

vlad01 wrote:Is that with the vac line connected and the engine running?


From my calc, you should see about 43psi running without the line. About 33 psi with the line and running.

Yes with engine running and vac line connected

That sounds about 10psi difference with or with out the vac line on the regulator.

Maybe that's the issue?

Seems to start ok at first
I did see a iac code, and at some point a vac error code.

But I'd have to check that again for codes stored

Hi Vlad,

This is with the engine running. Sitting about 3 bar, 43.5 psi. The needle is bouncing a little.

Hello team, Finally got the car running today after completing valley gaskets. Disappointment hits me when I started the car and to see its still rough at idle 700ish rpm. I decided to pull the vac line off the adjustable fuel reg, and it seems to not be as jumpy / rough, or uneven.. Q: how could I ...

This also sounds good.
I'll see how I go when I get home tonight.
Fingers crossed

Thanks Vlad.