Chevrolet 4.3 V-6 sudden lost of power.

check that the catilitic converter on the exaust system is not blocked

check your fuel pressure, and fuel regulator ,sounds like your fuel pump is on it's way out ,specially if you have over 100k mile

which engine options, surely you know it? to fix it you must.

ran it out of gas, car ran perfect or it was found with no gas

and im trying to bring bad a log parked car..... history , context....

was this car a daily driver, last month>?

seaform is junk never use that , never use additives unless pure raw

desperation, tell me ,why do mfg ,void your warranty with this in anycar, there is only 1 answer to that....

and why risk 4 poison 02 sensors on a V6, (worst case)

huh?

ok, engine stalls. (can a fast right foot save the stall)?

if compression is good.

and 12vdc is at the EFI , system. no below 10v ever.

then check for spark loss. on all cylinders? good?

did you scramble the spark wire? they have a firing order?

did you?

does car start and run good and sound good on test fuel (spray)

??????

these answer bring us to fueling last.

injections.

all EFI systems cut fueling if

1. spark seems weak.



2. CMP errors



3. CKP errros



4. or IMMO is unhappy. (lamp says, im unhappy, injection is CUT0

let us know, what you find.



and a fuel gauge tells you if fuel pressure meets spec.

and the injectors dont leak and a balance test show they are equal

all with one simple $20 gauge.

a $2 NOID lamp test the injector pulse.

if its only since you changed fuel filter it may be not sealing properly and getting air in ,,,, sounds like a missfire though

See if you can jump start the car from another battery which is sound. If you can then the battery you have is rubbish and must be replaced.

thats one hell of a common problem for parts to be coming out of the clutch, if the problems did not start before the clutch lost a screw or bolt i would have to say that the missing clutch is most of your problem. if the clutch slips you will have a lack of power you tell this buy starting off in 1st gear give it some gas to get it going then give it alot of gas if the motor revs up and the car does not gain speed as fast then your clutch has issues.

its a 2006 ? original battery ? its gone now its life is over . a new battery will solve your problem they only last 4-5 years most likely this is your problem hope this helps

If the only problem is idle and it runs grat above ide then the most likely component is the Idle Air Control valve. This is providing you have no codes stored indicating something else.

You just go to the link I attached I'm sure you will get the solution of your problem 1991 LS400