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- Posts: 478
- Joined: Fri Jun 02, 2017 11:10 pm
- Location: Western Colorado
I had this happen once on my turbo system. I had a fan failure in the MS and the resulting shutdown pulled rough pump vapor through my purge vent valve because I had all the vents ganged together in the hood. I ended up cleaning the inlet, replacing the purge vent filter, and finally swapping the EPC. All had been contaminated with rough pump oil vapor. Once I did that, things quieted down.MSCHemist wrote:
In my continuing saga of bringing back my 6890+-5973 that was allowed to regurgitate foreline fluid into the diff pump I am having 2 main issues now the biggest of which is tuning.
I hope its not your calibration vial valve. Those darned things are super expensive (~$3000).
You can try for more quiet in the baseline by swapping in an EPC from a working system after making sure the rest of the inlet hardware is clean.
Another possibility is filament sag. If any part of the filament body gets too close to the source, it will ground and turn all signal into hash. If this were intermittant maybe that would cause some of what you are seeing.