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They can. The fuel solenoids go bad with fuel contamination and can cause erratic fueling. The high pressure outlets have issues too which could cause a miss.

Some people have done that by sliding the head out just far enough to get the oring off and the new one on, but you run the risk of some internal pieces falling out of place when you do that.

I'd say not to run vegetable oil at all would be my recommendation. That's all on you.

I use qx231 by crystal clean. It is meant to clean up fuels and oils which makes it great for pumps. I know head guys use it in their dunk tanks too.

@@DieselPerformanceEngineering Thanks will look it up but not sure in Australia. I’ve put waste veg oil through the pump starting cold on wvo and stopping on a ve pump full wvo. Not purging with diesel in hindsight should have plus better filtering! Only did 3000 kilometres. Brand new china copy ve pump. It looks putrid inside from bad oil or rust, water etc. What do you think is likely needing repair. Learning about this and not sure really what to do. Its in 100 peaces atm same as this video. The veins in the front pump part are really clogged up maybe its that. But its putrid brown rust sticky looking on all metal peaces! Its cleaning off pretty easy though. Im thinking of building some sort of crude homemade test bench at home too. I ordered a new head and rotary ali express. China again! Hard to work out where to get a coupler thing for it!? Ive got a three phase electric motor that might spin it with s VFD. Do you have other videos on how to determine what is wrong and right with the ve pumps? How do you figure out what’s wrong so know what to fix??

@@jaffasoft8976 to figure out if everything is running right you need a test stand with injectors, advance gauge, transfer pump gauge, boost control, and overflow measuring capabilities.

@@DieselPerformanceEngineering cool, i know what the advance gauge is! What’s the others. Its a bit noisy when watching any others vid the test bench is running and usually in a languages cant hear or understand. Have you done a run through video explaining what is going on during the test bench process with the different gauges. Most videos i see around are in a different language and can not follow. I just got me VE pump out the ultrasonic cleaner. It looks cleaned up pretty good with s tooth brush scrubbing all the parts. I will start assembling today. I have ordered some CC diesel cc volume measuring tubes and 6, 800mm lines to connect to pump. Finding a coupler for the VE pump to join the electric motor is bit tricky. Not sure where to buy an adapter as ve pump is slightly angled where it slides on the spline and woodruf key!? Not even sure how the adapter works never seen a video up close explaining how it bolts the ve pump on so it can spin it.

That can affect your advance on certain pumps but not your governor as far as I know. I would make sure everything in your governor looks right and then I'd make sure your fuel screw is in the same place. Fulcrum lever would be my next suspicion

Thanx for the quick response. I'm gone give the pump a new look. Maybe i do something wrong. What do you mean with the advange ? And the fulcrum levler is that the thing were the cable is fixt? Im from Holland and try to understand.

@@ruudvanewijk308 call Arjan at Dutch Pump Performance. We do work together and he can help you in Dutch!

Thanx i wil contact him.

Message me or call the shop with the pump number and I can get you a Bosch line. The number will be something like 0460426397 and stamped on the aluminum housing. Shop number is 8163246680

Give it a quarter turn from fingertight

You can, I've heard of people doing it. The correct way to take it apart and put it back together is in the vertical position according to Bosch to keep your springs, rods, etc from getting misaligned.

I’ve done it used grease to hold it in lasted 3 years just now getting pump issues but i think it’s unrelated

Glad to help out! Good luck on your project

Normally there is a 10 digit number stamped on the main pump housing. From that number we can get parts breakdowns for you.

Thanks 👍

Thank you Raymond. We have to share the special stuff when we see it to keep the history alive!