Bogging Down

[JoeMadoo]

So my M30 runs great for about 5 minutes. When I take it for a ride around the block i barely make it back, it starts running like shit, and i can barely go up my driveway. It's not overheating. If i try to give it more gas, it just sputters, and I think i might have heard a valve hit a piston :(, but im not sure.

[MikeE30325i]

damn dude, that isnt cool at all.

good luck figuring it out, i can only imagine how you feel.

[SpunkyE30nOk]

check ya cap and rotor...I'm having the same issue with my m20, but mine won't stay running unless i give it some gas and then it sounds like shit. I figured out today that I over torqued my ignition rotor.

[drifty340i]

You sucked a bird in your afm with no air filter?

[Mr Deagle]

So how is that m30 working?


Im going with the bird in the AFM. Remove the bird and you should be fine

[bimmer_adam69]

bird???where in this thread did he say bird haha

but if its true then i agree release the bird...let him live!!!!!!!!

good luck with your finidings...

[JoeMadoo]

Haha. It seems like the bird only gets stuck when the engine is warm. My Idle Stabilizer Valve buzzes like crazy when its on also. I'm not getting the right voltage reading from the ISV harness connector, so I think my computer might be loosin it.

[bumpstop335i]

Try cleaning the ICV. check for vacuum leaks, plugs.
fuel filter?
Is your crank angle sencor tight or loose?

[JoeMadoo]

I cleaned the ICV.
New plugs, fuel filter.
No visible vacuum leaks either.
My sensor up front was loose, but i did tighten it and no luck.
I have a new coolant temp sensor, which i tested and it works.
The thing that bothers me is that when i test for 12 volts on the 3 wire ICV connector, there is only 9 on one side and 3 on the other. I think that is what is making the little guy buzz too.

It runs perfect when its cold, but when its warm its all i can do to drive it up my driveway.

[bimmer_adam69]

weird....have you tried testing the icv valve when she's cold to see if you've got 12 volts?? or is it the same when warm....and

i forget the name of the part(sorry)...but on the throttle body isnt there a sensor that needs to be calibrated, if that come loose or out of its original position doesnt it get fucked??? or...

am i just a moron and thats the idler controll vavle ICV????

[JoeMadoo]

Ya I calibrated the throttle body. I'm just not getting the right voltage out of the computer, I'm getting 3 instead of 12.

[JoeMadoo]

Well I got this crazy idea to unplug the o2 sensor and see how it drives. I drove it for about 20 minutes and it didnt bog down once. So i guess I must have wired it wrong.

[asubimmer]

damn dude, that isnt cool at all.

good luck figuring it out, i can only imagine how you feel.

if I quote you then I get an uber cool post whorization point too?

[Mr Deagle]

if I quote you then I get an uber cool post whorization point too?

hahahahahahaha +1

[gotKRAUT]

Well I got this crazy idea to unplug the o2 sensor and see how it drives. I drove it for about 20 minutes and it didnt bog down once. So i guess I must have wired it wrong.

schweet, glad to hear it....