1992 Mitsubishi Galant black smoke out exhaust, gas in oil

Tiny
72517251
  • MEMBER
  • 1992 MITSUBISHI GALANT
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 42,000 MILES
Auction salvage car, with burnt back seat, melted rubber mount that attaches exhaust pipe to body, directly under burnt back seat, found gas in oil, no gas in vacumn line coming from fuel regulator on fuel rail, all spark plugs very black. At first, I thought a lit cigar caught the seat on fire, (ha-ha).

now I suspect clogged, caty. Convertor or bad oxygen sensor made the exhaust hot enough to melt rubber exhaust mount under the floor board and rear seat. 4 cyl 2.0.

p.S. Car came with a jumper wire that ran from a electrial device on the drivers side of radiator to fuse box.
tried car with wire connected and not connected, with no change in black smoke. HELPPP. EXPECT $$$, BOB

would like specific instructions, on how to test componets. If possible

check engine light on, went to AUTO ZONE they said it is too old for their machine to test, motor is at least a quart low on new oil, removed plenty of gas and oil from engine and oil filter
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Sunday, May 23rd, 2010 AT 8:39 AM

1 Reply

Tiny
MHPAUTOS
  • EXPERT
Hi there,

Thank you for the donation,

This has all the signs of a failed (leaking) fuel injector, the over rich mixture will cause the cat to over heat to the point of causing the fire, excess fuel will wash the bores of oil and dump fuel into the sump,

Mark (mhpautos)
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Monday, May 24th, 2010 AT 4:01 AM

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