1998 Ford Crown Victoria motor not hitting on cylinder 3 &a

Tiny
JUNIOR2
  • MEMBER
  • 1998 FORD CROWN VICTORIA
  • V8
  • 2WD
  • AUTOMATIC
  • 98,000 MILES
I checked compression consitent on all cylinders, checked fuel rail pressure very good, changed the injectors and tested them nice cone of fuel, new spark plugs, changed coils twice, cleaned fuel rail with a professional pressure cleaner and solution. Checked spark with tester ok. Pulled valve cover and changed lifters and push rods checke lobes on cam good, cranked motor valves opening and closing like they should but still missing on both cylinders. These cylinders as far as I can see have fuel and spark and good compression and still is missing. This car ran perfect than ran out of gas and started missing. First it dropped 6 pushrods from gas gum but not on these cylinders I fixed all of them by cleaning and replacing push rods and making sure the valves were opening and closing correctly. If you have any idea let me know. Thanks Junior2 I will be glad to donate which I have done on other sites but they were unable to help me. You tell me how to fix it and I will be very happy to make a donation, thank you
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Friday, August 28th, 2009 AT 12:20 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
If you have spark, fuel and compression, as long as the timing is correct, they should fire. Are you sure the injectors are getting power? Are you sure the fuel pressure is good and you are getting spark to those cylenders?
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Thursday, September 10th, 2009 AT 1:40 PM
Tiny
JUNIOR2
  • MEMBER
Yes I checked the compression it was with in 8lb of every cylinder, I pulled the injectors and cleaned them they are all spraying a perfect cone, I changed them any way, I cleaned the fuel rail several times with a snap on pro cleaner. The rail is clean, The fuel pressure is very good, all cylinders are getting fuel. All the coils are firing I tested the coils moved them around still the same problem, I still put two new coils on and tested them too.I checked the lobes on the cam they are good, I replaced the lifters and primed them allso changed the push rods They were in good condition, but changed them anyway, I cranked the motor with the valve cover off and the valves were moving up and down and plenty of oil pumping thru the lifters. The injectors are firing correct and have the correct voltage to them, I have the tool to test it plus you can hear it with a stethascope, All the plugs are firing great.I even took them out and cranked the motor and watched the arc, I never do that.I had to see with my own eyes. The timing is fine I checked it I have done mechanical work for years. If you have Fire, compression & fuel it has to run if the timing is right. And it does run on 6 cylinders.I have allso had 3 other people I know come over two of them are full time mechanics and the other builds race cars and they can not figuire it out. It does not make sence at all.I guess it should be in the Smithstonian.I checked it for codes there are no codes. Cylinder 3 and 4 are the problem.I know its not believable if someone told me this I would say impossible. Well its sitting out side and I can not nail down the problem. So what do you think?
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Thursday, September 10th, 2009 AT 4:24 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Wow. Like you and your friends, I'm stumped. Keep in mind, because I'm not there, the questions may sound elementry or stupid, but I have to ask anyway. Is there any chance of the boot on a plug arcing? Was the crank sensor checked?

What is most interesting to me is that it hasn't set a misfire code. I need to think. I have a feeling this one is going to drive me crazy too. Also, realizing what all you have done, the above questions may seem stupid, but I have seen it happen before, and I have seen good mechanics not even think of them because when the plug is out and grounded, electricity will always take the easiest way out.
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Thursday, September 10th, 2009 AT 9:24 PM

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