2002 ford Taurus missfire and red hot exaust manifold rear 3 cyl


Asked by Jul 16, 2012 at 12:23 PM about the 2002 Ford Taurus SE

Question type: Maintenance & Repair

Hello all,

Daughters 2002 Taurus AC pulley failed.  I got car AFTER a local (to her work) repair shop started work to remove/replace AC compressor, estimate too high and she asked dad to fix.

Clutch assembly with pulley $65+belt $28

After reassembly and fired-up the car noticed it wanted to run very rough at idle but would smooth-out above 1K RPM.  
Thinking the CPU needed some time to re-acquire data after battery disconnected for 3 day's let it run for a couple of min while checking for broken wires or disconnected vacuum hoses.
All of a sudden noticed that the rear exhaust manifold had gotten cherry red........Do not have a code reader accessible till tomorrow, but thought of asking as what I may have disconnected while lowering the front part of the cradle to cause this.
Any pointers greatly appreciated.
P.S. Engine was running perfect until the pulley froze-up and tossed the belt (engine shut off as soon as the belt ripped).

4 Answers


Sorry forgot to add it has a 3.0L DOHC Duratec engine in it.


Unburt fuel is getting in to the cats heating it up cherry red. Fix the misfire and see if it goes away.

1 of 1 people found this helpful.

Afternoon all, Misfire and overheating exhaust manifold where caused by a couple of disconnected vacuum hoses at the right rear side of the intake manifold just a few inches past where the MAS hose connects into the manifold. One hose had a good snug fit, but the other (see attached picture) was really spun-gee and appeared not to make a real good seal. On this L shaped connector two red (approx 1/8") hard lines connect into the side and the 3/8" opening attaches to the intake manifold. Anyone knows what it is called and possibly what the part number may be? Thanks in advance. A

10 of 10 people found this helpful.

was gonna say, red ehaust manifold means running lean. Yes, vacuum leak is a possibility. I would go to a junk yard for this or ask a ford dealer.

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