Car misfires....please help

9

96floridacar

New Member

Jun 26, 2005

7

0

1

Jun 27, 2005

#1

• Jun 27, 2005

• #1

I have a 96 GT Convt and I just got the intake changed because it cracked. Ever since I got that changed, the car is running real ruff and doesn't have any power. The check engine light flashes on and off constantly. Its my only car so I've been able to drive it to work but it is very hard to do cause it idles very ruff. The guys at AutoZone used their computer and it came back misfire on plug 7. What could be the cause of this? It used to run great. It has 127,000 miles on it.
Any suggestions?

 

96WhiteNight

New Member

May 11, 2004

303

0

0

Carlisle, PA

Jun 27, 2005

#2

• Jun 27, 2005

• #2

Just the plug wire first of all then pull the plug out check the gap and stuff. Then if that fails take it back to who ever did the intake swap and make them fix it.

 

9

96floridacar

New Member

Jun 26, 2005

7

0

1

Jun 27, 2005

#3

• Jun 27, 2005

• #3

It was a shade tree mechanic who did the work and he is telling me I need to install a new head gasket. I don't think thats the problem because it did this about a year ago and a reputable shop just changed the pcv valve and it fixed the problem. I tried it myself and it still runs poorly. I hate to take it to a shop and be at their mercy.

 

S

sbelyo

Member

Jun 10, 2005

192

0

16

Jun 27, 2005

#4

• Jun 27, 2005

• #4

Just check and change the plug first. The plug wire could have also worked it's way loose. If you haven't changed the plugs or wires lately, now's the time.

The check engine light will come on for a mis-fire.

I doubt it's a head gasket. You'd be seeing smoke from the exhaust, and maybe oil in the coolant.

 

96WhiteNight

New Member

May 11, 2004

303

0

0

Carlisle, PA

Jun 27, 2005

#5

• Jun 27, 2005

• #5

sbelyo said:

Just check and change the plug first. The plug wire could have also worked it's way loose. If you haven't changed the plugs or wires lately, now's the time.

The check engine light will come on for a mis-fire.

I doubt it's a head gasket. You'd be seeing smoke from the exhaust, and maybe oil in the coolant.

Click to expand...

I agree

 

9

96floridacar

New Member

Jun 26, 2005

7

0

1

Jun 27, 2005

#6

• Jun 27, 2005

• #6

I'll check the plugs and the wires. One bad thing is I do see some smoke out the back when I first start the car then it stops soon after. Thanks for your help.

 

R

Roger_4.6_96

Founding Member

Jul 16, 2002

1,209

0

0

Reno,NV

Jun 27, 2005

#7

• Jun 27, 2005

• #7

Did you happend to get coolant everywhere ? If so look in your spark plug holes.

 

9

96floridacar

New Member

Jun 26, 2005

7

0

1

Jun 28, 2005

#8

• Jun 28, 2005

• #8

Yes, I noticed that there was coolant around the plugs and all over the engine. I've stopped the leaks but now it runs crappy.

 

Team801

Member

Dec 17, 2003

104

0

16

Salt Lake City, UT

Jun 28, 2005

#9

• Jun 28, 2005

• #9

Did you change your plugs yet?

Thats what I would do if I was you and also change the wires.

 

9

97gtblue

New Member

Apr 11, 2005

283

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0

pensacola,florida

Jun 28, 2005

#10

• Jun 28, 2005

• #10

check for a vacumn leak

 

d98gt

Founding Member

Mar 14, 2002

4,505

59

204

SE Texas

Jun 28, 2005

#11

• Jun 28, 2005

• #11

When my intake finally cracked, the coolant ended up getting into the plug holes which caused a wire to screw up.

The wire was sparking off behind getting to the plug and I noticed this at night. I replaced the wires/plugs and it fixed my problem.