1996 Ford Taurus stutters& stumbles

Tiny
CEDRICACKER
  • MEMBER
  • 1996 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 135,000 MILES
Hello I have a 96 ford taures it its runnin really rough. I changed the plugs & wires it still has a very rough take off stumbles alot. I changed the the fuel pump and it still is rough I think my converters may be clogged would that give it a rough idle even during takeoff I did notice 1 converter was cherry red when I looked underneath after I drove it any help would be great.


thanx
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Thursday, December 11th, 2008 AT 3:29 PM

3 Replies

Tiny
BUDDYCRAIGG
  • EXPERT
Sounds like you have a cylinder not firing.
So the unburned gas is getting to the cat, and the cat is burning it off, causing it to glow red.

You’ll need to do a load balance test to see which cylinder is dead.

Have the engine idling with a low RPM tachometer hooked up.
Remove one spark plug wire,
Make note of any change in RPM.
Reinstall spark plug wire and move to the next one.

When you get to one and the RPM doesn’t change, that’s the bad one.
Now you know where look, you just have to figure out why that cylinder is not sparking.

Remember spark plug wires can have 40,000 volts in them. And the electricity can jump about 1 inch at that voltage.
Take precautions and use the proper tools to keep yourself from getting shocked.

PS, most Dwell meters at auto part stores have a low rpm range on them, and they can be bought for about $10.

Good luck
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Thursday, December 11th, 2008 AT 4:23 PM
Tiny
CEDRICACKER
  • MEMBER
Ihave an 3.0 ohc motor so I could only check the front three wires, I just have one question could my coil pack give me this kind of headace I mean not fireing to that cylinder which ever one it is.

Thanx buddy
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Thursday, December 11th, 2008 AT 6:51 PM
Tiny
BUDDYCRAIGG
  • EXPERT
Anything is possible.

I'm a GM guy, but the way I understand that coil pack works, it's basically 3 individual coils put in the same box. Each coil fire 2 spark plugs each time it goes off.
One cylinder at the top of the compression stroke, and one at the top of the exhaust stroke.

So I bet (i didn't look up your firing order) but I bet if you find one dead cylinder on the front, you would have the corresponding cylinder on the back would be dead too.

Can you get to the coil pack for testing load balance?
Or if nothing else, at least do the front 3
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Thursday, December 11th, 2008 AT 7:06 PM

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