my car is jumpy :(

[p3rsian]

hey
my car in the morning when i gas and the car goes over 2rpm it feels like the car is like jumping the rpm doesnt go smoothly up it like skips and jumps a little bit , the car also some times and i mean like 1nce every month does it when im on a hill .. whats goin on ?

[Autotechnica]

Sounds like Turbo lag :lol:

Are you driving the car when the engine is cold, or does this happen when it's up to normal engine temperatures as well?

I have no clue what the problem is, I've never seen this before.

bump, someone help this guy,

Bry

[M3Daemon]

I really hope you mean 2000 rpm and not only 2 :wink

But seriously... that sounds like some of the cylinders are not firing. Firts thing I would do is check the ignition coils and spark plugs. Whatever it is, it sounds more like it is an electrical problem. Let the dealer run an electronics test (if you would have the equipment to get the fault code I figure you would have done so already), that is pretty much the only way to diagnose a complex problem.

Anyways, it sounds serious ... get it checked soon!


Daemon

[Kevin325i]

It almost sounds like clogged fuel injectors, so when you're hitting the gas it's not getting the fuel it wants.

Does the car feel like it has no power? cause it could be a cylinder not firing.
If you've got a '92 325i sometimes the ignition coils crack, it's possible that maybe this is your problem used

Just tossing some ideas around

Kevin

[DesmoBob]

many symptoms at full load (misfire, poor output when warm, etc) are cross-referenced to the following family:
- fuel pressure regulator
- fuel pump
- fuel return line

if there was an accompanying engine fault corresponding to misfire, these are what it said could be causes (*asterisk = "indicate actual field findings"):

Originally posted by TIS

-- *Vehicle ran low or out of fuel
-- *Poor fuel quality (ex. water in fuel, customer uses an additive, etc.)
-- Low/high fuel pressure
-- *Ignition coil
-- *Injector harness connector loose (X6150)
-- *Fouled spark plug(s)
-- *Restricted / contaminated fuel injector(s)
-- *Crankshaft position sensor
-- Poor combustion due to low compression or high leakage
-- *Broken valve spring
-- *Engine over-rev
-- *Hydraulic bucket tappet (HVA)binding. Note: A common complaint associated with a binding HVA element is that the engine runs rough during the warm up phase.

for jolting under partial load, TIS says "check injector valves for leaks & cleaning."

[///M Power]

might need a new fuel pump!