Intermittant loss of power

Clean the MAF sensor. Could also need a tune up, plugs, wires, cap, rotor, fuel filter. Could also have a stopped up catalic converter that needs to be replaced.

i would recommend you connect a fuel pressure gauge to the engine fuel rail port and watch the fuel pressure as you drive it note fuel pressure should be between 31 and 39 psi and stay there while vehicle is being driven. if it drops check the wiring to the pump in many cases the pump connector is burned and losses connnection. also try watching the egr see if its diaphragm keeps surging try disconnecting the vacuum hose to it see it any change is noticed, common problem 4.0 engines of that year EGR's cost about 90 dollars but help stalling and emissions problems greatly.

Hello Mg.

Basic diagnostics first. Check for spark and fuel pressure.
Then compression test.
I am suspect the timing belt may have broken or skipped some teeth from your description of failure.
If the belt has broken you will have no spark, no injector pulse and low compression.
If the belt has skipped you may still have spark and injector pulse but compression will remain low or none.
This engine I believe is a non-interference engine so if the belt breaks it should not damage internal parts.
If you need more assistance on this leave them in a comment to me.

KL

As a seasoned DIY, it sems you have a good understanding of this problem. What grade petrol r u using? I assume u have eliminated fuel pressure and filters as well. Try checking the injectors if they r working fine. Check them while cold and also after the engine has warmed up. Good luck pal.

No your tranny is most likely ok. I would be looking at the transfer case.

the "tool " is refering to service work. Could be fuel related but not really the fuel filter. do you have plenty of miles between services. otherwise may be showing you that your service is due. and mileage will suffer. I am assuming you have no loss of power? No power loss no fuel filter problem. check when the next service should be done and check your air filter. another big thing that trips sensors and leads to poor mileage.

my trafic did the same.no power pulling away until the turbo kicked in and it turned out to be the airflow meter.Hope this helps as it cured mine.Plus non of them rev past 3800 revs its normal.

The battery grounding ******** vw's periodically go bad and need replacement, I would suspect this to be the case.
It will corrode
in its casing, resulting in faulty electrical systems.

Have Audi 1994 80 v6 2.6lPrefix ABC No power on acceleration but is intermittant, feels like loss of fuel

does it feel like its in 2 gears at once and dragging. what was the original trans problem(why you changed it)