Cylinder 4 misfire - Bank 2 system too lean

Tiny
MOUNTAINMYST
  • MEMBER
  • 2007 FORD 500
  • 125,000 MILES
After six months of my car occasionally hesitating upon acceleration and jumping a bit when idling, it finally kicked out an engine light code indicating cylinder four was misfiring. Two days ago I took it to my local trusted mechanic. I left it with him for about ninety minutes. It appeared he did a thorough investigation. He explained there are multiple causes and levels of repair regarding a cylinder misfire and that unfortunately, my problem goes to the deepest level. The engine. He said he replaced the coil pack with a used one before ordering a new one to see if that would fix it and it did not. He lifted the cap and had me listen to clicking noises going on in there. Sounded like an electric charge type of clicking noise to me. He said that was never anything you wanted to hear. Very bad! He further explained I was only getting 60 lbs of compression. Bottom Line: "Your car is terminal."

Strangely, he indicated he had another customer in this past month same car, same problem at 150,000 miles. Same diagnosis. I live in a small rural town. Is this a known problem with Ford 500 or just a coincidence? Or a misdiagnosis?

He said it would require an engine replacement to fix it and he could not recommend I do that at this point in the life of this car. He drove it and said the transmission also sounded "off" to him. I agreed. I have only driven this car for three years and have always complained about the extremely whiny engine.

He told me I could continue to drive it until it quit but he would not recommend taking it on a road trip. Only around town. Ironically, it has driven perfectly the last two days, leaving me baffled and confused about what to do.

I am basically asking for a second opinion. Is it possible my mechanic missed something easier to fix other than an engine replacement or should I consider this a complete loss? I am really bummed as it does no sound like I can even use this car for a trade-in. Nor am I financially wanting to assume car payments on another used vehicle with its own unknown problems. (Fixed income!)

I was so happy to see you guys out here in cyber world, so graciously offering advice to those like me who truly have no clue. Many thanks!
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Saturday, May 20th, 2017 AT 9:10 AM

8 Replies

Tiny
SATURNTECH9
  • EXPERT
If you only had 60 psi compression and that cylinder would not fire that would not be intermittent. So sounds like something else is going on. A simple compression test would tell you about that cylinder four having very low compression. But with it running good now I do not see how that is likely. Is check engine light off now?
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Saturday, May 20th, 2017 AT 12:37 PM
Tiny
MOUNTAINMYST
  • MEMBER
Thanks for the quick response! No. My check engine light stays on. For two years it has maintained a code for some type of emission problem regarding my fuel cap. Please keep in mind, this off and on engine hesitation problem has been going on for six months. Some days it drives horribly and the next day acts like nothing is wrong. If it truly is "terminal", it is strange to me that it drives okay some days. Pretty much half the time. What the heck? Any ideas?
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Saturday, May 20th, 2017 AT 1:15 PM
Tiny
SATURNTECH9
  • EXPERT
You need to have it scanned to see what the exact code numbers not code descriptions you have in the computer. That is where we need to start. Diagnosis has to be done to find the problem.
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Sunday, May 21st, 2017 AT 12:31 AM
Tiny
MOUNTAINMYST
  • MEMBER
The code is P0304.
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Sunday, May 21st, 2017 AT 1:39 AM
Tiny
MOUNTAINMYST
  • MEMBER
I do not have the code for the emissions issue (the one that has been there for two years). I will have to get Auto Zone to give me that one the next time I go to town, maybe tomorrow (Monday). I was simply told my fuel cap's seal was probably broken.
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Sunday, May 21st, 2017 AT 6:44 AM
Tiny
SATURNTECH9
  • EXPERT
So the current code you have is p0304?Or that was the past code you had?Because you said you have to have it scanned for evap code. If that's the case let me know what the current codes are when you habe it scanned on mon.
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Sunday, May 21st, 2017 AT 1:30 PM
Tiny
MOUNTAINMYST
  • MEMBER
P0304 is the last code scanned and what resulted in me discovering the #4 cylinder was misfiring. I did not ask if the other 2 year code was still present and the mechanic did not mention it. I will have Auto Zone rescan it and let you know. Thanks so much!
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Sunday, May 21st, 2017 AT 3:19 PM
Tiny
SATURNTECH9
  • EXPERT
Ok let me know the actual current codes you have you might think about getting ypu own code reader there getting a lot cheaper these days. Some of the cheap ones even have some live engine data readings on them.
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Monday, May 22nd, 2017 AT 6:55 AM

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