Please Help. I have a misfire under my car when in drive or sitting at a light.

3 posts 3 contributors 598 views

denwhiOP

Member since Mar 2011
4 posts
indianapolis, IN, USA

Aug 22, 2013 at 9:25 AM

2003 Crown Vic PI
Sometime it feels like the idle skips a beat. I can feel vibrations under my feet. This morning when I pulled up at home the idle was loud (high) and my check enging light came on. However, it went off after it sat. Thanks

jdmeaux

Member since Jan 2009
525 posts
Lafayette, LA, USA
1 vehicle in the registry

Aug 22, 2013 at 11:23 AM

Go get a parts house like O'Reilly's, Autozone, or Advance Auto to pull a code if you don't have a OBD scanner. Once you find out what may be wrong, then you can start fixing it.

*******************
PROUD MEMBER of www.crownvic.net

It's just a SUPER-DUTY Mustang GT Sedan. 198K miles and still rolling HARD.

1997 Crown Victoria P71 SVT *** ex-US Marshall service (the CAR)
STOCK?? I bet it was modified.

13.26 @ 107.24 MPH 1/4 mi w/ me, tools, & full tank of 93 octane

I added CAI, NICHE 19 X 8.5 " wheels with 245/45ZR 19 rubbers, and completely rebuilt the front end with poly bushings, Kooks headers, 2 1/4inch exhaust, TCI 2200-2400 rpm Stall converter

.PLANS:: engine upgrade, 5.4L 2v stroker, rebuild interior in leather w/ buckets, thinking about turbos

curemode2002

Member since Mar 2012
147 posts
Lehi, UT, USA
1 vehicle in the registry

Aug 22, 2013 at 11:33 AM

+ 1 on the codes it will still pull codes even if the light is not on

If you find it is a misfire on say number one move the coil to a different cylinder and see if the error code moves that will tell you it is a coil pack issue. If you move and it does not follow you will want to pull the plug and inspect it to see if you have a coolant leak or mixture issue. If it looks good change the plug.

Usually with the coil on plug motors like ours you will need to change the coils every 80-100k.

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