1999 Mercury Mystique firing problem

MCDERMITTAARON

MEMBER
1999 MERCURY MYSTIQUE

1999 Mercury Mystique 4 cyl Automatic

I have weak fire. Im supposed to have bright blue fire and I have orange (sign of weak fire). I already changed my plugs, wires, and coal pack. But no luck. Any ideas? Now ill let you know that I have no distubator, its a dual (2) coal pack and im already pulling 13+ volts from the battery.

4 Replies

BLACKOP555

MECHANIC
10,371 POSTS

All cylinders have orange spark?

Are you sure your grounding out the spark tester porperly?

What is the negative voltage at the coil?

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Tuesday, April 7th, 2009 AT 6:47 PM

MCDERMITTAARON

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3 POSTS

We found another problem my timing belt is missing teeth. So it cant completely turn over. So I got to get a new timing belt and set the timing. We also found out that I have a fuel problem. Its getting right fuel pressure. But it seems like its flooding. But I was told that the timing can mess up my fuel and spark problem.

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Thursday, April 9th, 2009 AT 7:54 AM

BLACKOP555

MECHANIC
10,371 POSTS

Yes if the vehicle is putting fuel in before teh spark or after the spark it just builds up and will flood.

Fixing the timing shoudl restore proper fuction. Camshaft and crankshaft sensors may have to go through a relearn procedure.

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Friday, April 10th, 2009 AT 8:54 AM

MCDERMITTAARON

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3 POSTS

When setting the timing. The exhaust camshaft has a spring pulley. Explain how that works. Do I put tension on it or what. Ive never seen anything like that before. We bought a new belt and installed it. We didnt put any tension on it. And it flipped out of wack and split. So bought a second belt and installed it with the tension on the camshaft. And the car turns over but it seems like it may be out of time by just a tooth or so.

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Monday, April 20th, 2009 AT 8:14 AM