Bay Window Bus Fuel Pump and Question

[Baconator200]

Hi, I am very new to the VW community and have a few questions.

I have a 1975 transporter with a 2.0L FI engine

1. When I start go to start my bus I can hear the fuel pump prime the system and then the bus starts but once I start driving the fuel pump becomes ridiculously loud. The pump almost sounds like its gurgling.
Is my pump faulty or maybe is it sucking in air?

2. My second problem is whenever I hit a bump on the road I hear loud banging right under the shifter. Are my bushings worn out on the shift tube or could it be something else im not aware of?

3. When driving on the highway at 70mph my bus will randomly stutter. I don't know if the engine is dropping a cylinder for a second then picking it back up. It might be caused by either spark or fuel. I'm ruling out spark because every part of the ignition system has been replaced.

I will appreciate any help or advice that is given and will try and stay as active as I can on this page.

[busdaddy]

Welcome!

Loud fuel pumps usually indicate crap in the gas tank partially blocking the outlet or a clogged fuel filter.

A noise over bumps from under the front floor could be many things, start by having a couple buddies bounce the bus up and down on the front bumper to see if you can make the noise, if it does get underneath where you won't get crushed and isolate where it comes from.

The highway stutter probably relates to question #1.

Does your fuel pump run before the engine is started?, it shouldn't do that.
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[Baconator200]

Yes, my fuel pump does run before the engine starts. I figured this was the bus priming the system but it sounds like something is wrong.

I will do what you suggested tomorrow and see if I can recreate the noise.

I will post my findings tomorrow once I get some time.

Thank you for your feedback!

[aeromech]

Try tightening your shock absorber bolts
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[AB westy nut]

The stutter at 70mph can be so many things. Could be worn tracks on the air flow meter. Could be a timing issue. Does it happen right away or only after a long period of driving? Have you tested/replaced the TSII? Is all your cooling tin in place? Have you checked/adjusted the valves? Have you replaced the fuel and air filters? How are the spark plugs? Tried running some injector cleaner? Check to see that the FI grounds under the intake plenum are really really tight. Check your battery negative strap to see that it's tight and making good contact on the body. Check all FI connections.
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1976 Sage Green Westfalia Deluxe

[secretsubmariner]

I'm betting on the clogged fuel filter.

Mine started whirring very loud at a different higher pitch, and I found my fuel filter chock full of sediment.
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1970 Auto Fastback FI

[cellobus1]

X2 on the shock bolts, but check that the steering dampner isn't loose also. Also there's a bushing at the front end of the shift rod that just falls off sometimes, 211 711 182. It may even be something as simple as the undercarriage cover plate being loose.

I have the same stuttering problem but it just happens randomly on an otherwise perfectly running car, so I'm all ears, but I would think that with breaking up at 70 mph a rev-limiting rotor might be in your distributor?
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formerly, 1959 Standard bus
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[pioneer1]

Noisy fuel pump...could be loose or rubbing on the frame- its suppose to be mounted on rubber bumper. Also have a google on "cavitation"...
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