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Re: Missing 4.6 V-8
| Brad Behm | 29 Oct 2006 16:47 |
Fred,
Thank-You for the post
Compression is fine...but that's at starter moter speed. Is there some other valve train related problem that could be causing the intake valve to hang up that may be typical with this motor? I swapped # 1 injector with the adjacent cylinder and cleared the codes hoping when "check engine" comes back on it will indicate problem in the swapped cylinder rather than # 1. Short of that I can't think of anything left but valve train malfunction. What do you think?
Thanks Brad
> Brad, > [quoted text clipped - 27 lines] >> >> Brad |
| septicman@peoplepc.com | 29 Oct 2006 15:22 |
Brad,
These engines are prone to having the cam follower pop off, making either valve inoperable. Do a compression test of the cylinder. If there is zero compression, it could be because the intake is not opening at all.
Land O'Lakes Fred
> Hi, > [quoted text clipped - 14 lines] > > Brad |
| Brad Behm | 28 Oct 2006 16:02 |
Hi,
My '95 Town Car with 4.6 SOHC V-8 is missing on the # 1 cylinder. The computer says so, and the spark plug indicates incomplete combustion as it is pretty black compared to all the others. Sometimes it the engine backfires into the intake plenum especially under acceleration. I have eliminated the coil pack (swapped sides), spark plug (replaced all) , and spark plug wire (replaced) as the problem. Should I be looking at fuel delivery i.e. plugged injector, or even valve train problems or is there something I have overlooked in the ignition sector? My gut tells me it's ignition related, especially because of the intermitent "cough" up the intake manifold...reminds me of crossfire. Is there an electrical/electronic component that would only effect the # 1 cylinder that I haven't already checked out, or should I move on to fuel or valve train?
Thank you in advance anjyone who can help me.
Brad
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