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Author Topic: 1997 ford has miss?????  (Read 2196 times)

Offline huntergreg

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1997 ford has miss?????
« on: August 22, 2012, 09:10:52 PM »
I have a 1997 ford. It has a weird miss while in drive at a idle. When I put it in gear and have the brake on is when it does this. When I speed up it will go away. when It is in park it runs fine with no miss. It is driving me crazy!!  :bash: Any info would be great. Thanks

I also Have no check engine light on. I have been to autozone and checked a number of times for a light or code to come on but nothing.  :dunno:
I have changes==  fuel filter
                               spark plugs
                               air filter
                               o2 sensors
                               Took apart the throttle body and cleaned out the egr ports.
« Last Edit: August 22, 2012, 09:19:19 PM by huntergreg »

Offline sled

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Re: 1997 ford has miss?????
« Reply #1 on: August 22, 2012, 09:16:26 PM »
  Plug wires?

Offline huntergreg

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Re: 1997 ford has miss?????
« Reply #2 on: August 22, 2012, 09:18:22 PM »
  Plug wires?

Would the miss be there all the time or set off the check engine light??

Offline sirfunkeybut

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Re: 1997 ford has miss?????
« Reply #3 on: August 22, 2012, 09:20:26 PM »
any chance theres a hole in the muffler system? almost sounds like its losing back pressure  :dunno:

Offline huntergreg

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Re: 1997 ford has miss?????
« Reply #4 on: August 22, 2012, 09:22:52 PM »
any chance theres a hole in the muffler system? almost sounds like its losing back pressure  :dunno:

No holes anywhere. Haven't herd any kind of exhaust leaks.

Offline Heredoggydoggy

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Re: 1997 ford has miss?????
« Reply #5 on: August 22, 2012, 09:26:15 PM »
Faulty fuel injector?  :dunno:
If it was easy, everybody would be doing it.

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Offline Hunter mike

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Re: 1997 ford has miss?????
« Reply #6 on: August 22, 2012, 09:29:19 PM »
Take a real close look at the coils - they are notorious for cracking and intermittent failures...  The '97 still has two sets of 4 coils (98 and newer are coil-on-plug ignition).

I've had lots of other nitpicky little sounds that I initially though were an engine noise so poke around a bit.  My '97 was a pain in the butt with similar hard to diagnose problems and I had the check engine light every other week it seemed (different ones  :bash:).

Good luck... I traded mine in for a Cummins - the engine noise covers up whatever other problems there are  :chuckle:

Offline fair-chase

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Re: 1997 ford has miss?????
« Reply #7 on: August 22, 2012, 09:43:57 PM »
I have a 1997 ford. It has a weird miss while in drive at a idle. When I put it in gear and have the brake on is when it does this. When I speed up it will go away. when It is in park it runs fine with no miss. It is driving me crazy!!  :bash: Any info would be great. Thanks

Are you sure it's a '97?  :chuckle:  Because if you had said '77 this would be a classic case of the brake vacuum throwing your timing advance off. As it stands I have no idea why a '97 would do this related to the brake being depressed. Interested in seeing what the solution is.

Offline whacker1

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Re: 1997 ford has miss?????
« Reply #8 on: August 22, 2012, 09:51:57 PM »
Usually with a bad plug or plug wire, they will go into limp mode.  At least that is what has happened to me over the last 186k miles about every 60k or so. 

I think the coilsand injectors as mentioned prior are reasonable places to look.

 


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