My 1997 Oldsmobile Aurora, engine running High Rev(WOT)- but it surges/falls- MVI 1794.avi

[bacon54654psn]

there is a park rev limiter aka governor

it only allows the engine to rev to a specific point when in park or neutral

it can be removed if you reprogram the ecu

sounds to be about 3krpm

most of the limiters are set to 3k in p/n

the drop when idle along with the rufness is more than likely a mis fire if you rev your engine like that all the time

also sounds like you have some blow by

looks like your motor mounts are a little warn out due to reving high all the time

[mnalep2]

Mine needed a fuel pump. U can get a fuel guage tester for $25 - Harbor Freight to test.

Check to see the spark plugs are getting good spark. Harbor Freight has a tester for $2.50.

Clean the mass air flow sensor. There is a special spray u can get at any auto supply store.

Clean the 'butterfly valve on the intake manifold - special spray for this also.

Also make sure you have good gasoline in it. Try some dry gas, and put in gas from different gas stations.

Good Luck!

[cordelmar]

mine runs smooth but wen i get to a stop it dies every time, i clean the air intake sensor, i pourd additive in the fuel and oils to clean what ever mite be dirte.

I notice that it dies wen the engine warms up after a few minutes. Can some one help me with this?

[ipodtouchfan221]

Sounds like its knocking?

[cordelmar]

Clean your intake sensor with carb or fuel injection cleaner, (comes in spray can)

and after a few miles you fix the problem.

[YoungerPrice]

maybe the IAC motor,vacuum leak,EGR vavle,tps sensor,map sensor,map vacuum line

[briankevinpitt]

These cars have all kinds of "safety"/torque/over reving features to keep you from blowing the engine. All Aurora's do that.

[mnalep]

RCFLYER83, Thank you for that information. I did not know there was such a limiter.

So I only have one engine problem, which is the drop in rpm at idle, and occasional roughness.

[RCFLYER83]

Sir that would be the nuetral rpm limiter. It keeps you from blowing up your engine.