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 bad catalytic convertor, red exhaust
#1062336
07/25/13 12:46 PM
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Joined: Nov 2009
Posts: 227
OP
Wheeler
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My montero sits for weeks and after vacation a week back I jumped in it to take it for a spin like I usually do every few weeks. I noticed it didn't want to rev very high and it didn't sound the same. After driving the neighborhood I know something was wrong Because it couldn't get to 15 mph and sounded like it was bad gas or a bad pump. After draining the gas and putting almost 5 gallons of premium in I sat in my drive way reving it higher than idle to get new gas in the lines and my buddy looked under neath at smoke and seen a red hot exhaust. Thays where I'm at now
You can call me Fez
'95 SR 15x8 steel rims w/ 33x12.5 Duratracs, cranked torsion bars, "Baja" lights
'09 Nissan Sentra SR
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Re: bad catalytic convertor, red exhaust
[Re: xFezx]
#1062337
07/25/13 02:31 PM
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Joined: Sep 2009
Posts: 476
Mudrunner
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Red hot exhaust could be from a plugged cat or timing issue. Power loss could also be caused by both. Smoke is normal (just kidding). Smoke could be from bad VSS that was previously unnoticed because it exited the tailpipe. Perhaps if the cat is plugged, now the smoke is exiting at the gasket and is noticable.
Drop the exhaust and see if the power issue is eliminated.
1992 VR4 12.5 @ 110 - SOLD
1993 Stealth RT/TT 11.4 @ 129 - SOLD
1991 VR4 9.2 @ 159 - Old Shop Car
1992 Stealth Twin Turbo ATX - SOLD
1990 Montero LS LWB - RIP
1995 Montero LS - RIP
1998 Montero
1992 Galant VR4 474/1000
2007 Prius
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Re: bad catalytic convertor, red exhaust
[Re: MBrannon]
#1062338
07/25/13 11:58 PM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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Or it is running very rich, due to a bad ecu ect sensor, a atuck open injector, or a leaking injector. This can melt the cat and clog it, causing the loss of power. A clogged cat/blocked exhaust can be pressure checked. Drill a small hole in the pipe ahead of the cat and check the pressure. Google search how much pressure you will see with a clog - iirc, a pound or two is all it takes to decrease power.
Not responsible for advice not taken...
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Re: bad catalytic convertor, red exhaust
[Re: xFezx]
#1062339
07/27/13 04:46 PM
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Joined: Jun 2004
Posts: 1,513
Body Damage is Cool
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My montero sits for weeks and after vacation a week back I jumped in it to take it for a spin like I usually do every few weeks. I noticed it didn't want to rev very high and it didn't sound the same. After driving the neighborhood I know something was wrong Because it couldn't get to 15 mph and sounded like it was bad gas or a bad pump. After draining the gas and putting almost 5 gallons of premium in I sat in my drive way reving it higher than idle to get new gas in the lines and my buddy looked under neath at smoke and seen a red hot exhaust. Thays where I'm at now OR It's from the VSS leaking a lot of oil and then it began to burn in the CAT/Exhaust. Extra oil can cause CAT to fail -or so I heard. I had a chevy that went out of time once (distributer turned) and it caused hot CAT and cracked the Exhaust manifolds.
1990 Black Monty LS Over 300K' 1993 Isuzu Rodeo LS 4x4 46k (yes only 46K!)1989 Honda Transalp 600 Africa twin,
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