Rough idle, flames from exhaust

Asked by Oct 25, 2016 at 10:38 AM about the 1994 Mitsubishi 3000GT 2 Dr SL Hatchback

Question type: Maintenance & Repair

I recently replaced the motor in my 3000gt after a
mechanic said I bent 8 valves in the orginal motor.
After dropping the motor in, making sure that
everything was hooked up (minus the egr valve and
sensor that is not on this motor) I got her started
but she back fires and runs rough. While working
on it the other night the wife said that she seen a
glow coming from the exhaust when I revved it,
looking for myself I noticed a 6inch flame shooting
out of the exhaust and both cats glowing bright.
What could be causing this? How can I fix it?

2 Answers

103,715

It sounds like the ignition timing is way off.

1 people found this helpful.
175

Hot dam! Son u got a fast n furious car. Running way rich timing off by a lot! Something is hooked up wrong! You need a odb scan tool to make sure everything is in order before you blow it up

Your Answer

Mitsubishi 3000GT Experts

  • #1
    dandyoun
    Reputation
    2,630
  • #2
    Daniel Foster
    Reputation
    1,080
  • #3
    T_S_T
    Reputation
    260
View All

Related Models For Sale

Used Mitsubishi Eclipse
10 Great Deals out of 873 listings starting at $1,488
Used Mitsubishi Lancer Evolution
10 Great Deals out of 482 listings starting at $13,998
Used Ford Mustang
270 Great Deals out of 37,082 listings starting at $2,150
Used Chevrolet Corvette
101 Great Deals out of 15,517 listings starting at $3,900
Used Dodge Stealth
35 listings starting at $4,995
Used Toyota Supra
50 listings
Used Chevrolet Camaro
224 Great Deals out of 28,922 listings starting at $3,900
Used Nissan 300ZX
115 listings starting at $3,995
Used Nissan 240SX
9 listings
Used Mazda RX-7
56 listings
Used BMW M3
12 Great Deals out of 1,668 listings starting at $6,995
Used BMW 3 Series
833 Great Deals out of 32,432 listings starting at $995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.