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Loss of power on accelleration w/ Brown Smoke

Tiny
CHUCK ROAST
  • MEMBER
  • SUZUKI
1999 Suzuki Grand Vitara 2.5L 4WD Automatic

Problem seemed to start after an oil change at a speedy Oil Change place where they overfilled aprox 2 qts. Engine started smoking at startup for aprox 5 sec.
Determined overfill condition and drained down to full mark.
Still smoked on startup. On accelleration, preignition Knock, (Loud) accompanied by Brown Smoke. On reduction of accellerator sound and smoke ceased.

PCV Valve was completely fouled and replaced. No effect. I'm wondering if changing the PCV while the engine had been shut tdown for 5-10 min might have just pumped rocker arm oil back into the new PCV as the first start after the R&R was clean, no smoke.
Thanks in advance, I also donated.
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Tuesday, May 29th, 2007 AT 10:59 AM

2 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Possible. Can you se if there is oil in the intake manifold? If it was pumping it down the exhaust, it probably put a bunch in the cat converter. Will take a while for it to burn out, hard throttle works a little better for getting the cat real hot to burn contaminents out
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Tuesday, May 29th, 2007 AT 2:09 PM
Tiny
CHUCK ROAST
  • MEMBER
  • 2 POSTS
Thanks for your quick reply. What did I miss prior to ". Possible"
I'm not sure I could see into the intake manifold w/o removing the throttle assy. Sounds logical though. I guess it would foul the plugs pretty bad also and that could account for the power loss on accelleration.
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Tuesday, May 29th, 2007 AT 3:23 PM

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