Sputtering chaos. (long post)

[mtechnik]

Hi guys i'm new on r3v as you can see. Will do a proper intro in a bit.

This morning started the car etc and when i started to drive off slowly smth didnt seem right. Went to tank at the gas station a little up the street, fired it back up--> There's this sort of sputter that sounds more or less like a VW Beetle/ Subbie WRX but not as loud.

-Idle is constant
-Engine was still rather cold but seemed a tad rough

So I got frustrated and came back home.
After a couple hours i took it back out after letter it warm up completely.

- Idle is constant but there's a noticeable vibration
-When letting off the gas the "exhaust sound" is "normal" give gas again-> the sputter
- No oil in the coolant expansion tank
-No milky oil on dipstick
- No white smoke out the exhaust
-No apparent power loss, then too i didnt want to push it much.
-Fuel filter replaced some 48.000km's ago.

I'm at a loss ......... please help.

Thnx in advance

[Erick]

Spark plugs fouled?

[mtechnik]

hmm didnt think on that.. so it's rather common then?

[Erick]

Not a matter of common.... spark plugs usually go bad if they were never replaced. (Or have been considerably driven on without replacing).

Before megasquirt (or any sort of rational tuning), my turbo car would go through spark plugs on a monthly basis.

[mtechnik]

hmm ok. At the last oil change in December the plugs weren't replaced cause they were still good .

Whao..plugs monthly

[mtechnik]

bump

[mtechnik]

problem solved luckily. Spark plugs were shot