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Lincoln LS random misfire

82 messages,  Last post on Oct 01, 2009 at 10:29 AM

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#53 of 82 Re: misfire [jay456] by akirby May 08, 2008 (6:56 am)
Replying to: jay456 (May 07, 2008 7:41 pm) Are you sure you counted the cylinders correctly? Maybe you replaced the wrong ones. If not then it could be the fuel pump. Replies to this message: jay456 (May 09, 2008 6:29 am) akirby (May 09, 2008 6:41 am) pman9 (Jun 11, 2008 12:49 pm) jay456 (Jun 27, 2008 4:49 pm)
#54 of 82 Re: misfire [akirby] by jay456 May 09, 2008 (6:29 am)
Replying to: akirby (May 08, 2008 6:56 am) yes...wait... i think so pasenger side from front of vehicle to rear 1-4 driver side from front of vehicle to rear 5-8 that should be correct. some of these messages say its not the fuel pump i think ill check pressure at the rail next just to make sure. have you ever heard of the PCV tubing i mean could that actually cause misfiring to happen. Replies to this message: akirby (May 09, 2008 6:41 am)
#55 of 82 Re: misfire [jay456] by akirby May 09, 2008 (6:41 am)
Replying to: jay456 (May 09, 2008 6:29 am) I think that's right. Here is what I found:   Back (Fire Wall) 4 8 3 7 2 6 1 5 Front (Radiator)   I've heard some references to the PCV valve with misfire symptoms - certainly won't hurt.
#56 of 82 2003 Lincoln Ls V-8 misfire code PO357 by learpilot May 30, 2008 (4:16 am)
I have a random misfire. I got the code of PO 357 Ign Coil G Primary/Secondary Circuit Malfunction. Which coil is "G". Is that number 7 , second from the firewall drivers side ? Thanks for your reply, Rick
#57 of 82 Re: misfire [akirby] by pman9 Jun 11, 2008 (12:49 pm)
Replying to: akirby (May 08, 2008 6:56 am) Just signed up so I may be late on your help. I know the problem well. Some times if you slide the connector off of the ignition coil that is in question you'll find the rubber seal pushed back. This will create a loose connection and condensation can get trapped and last but not least it will throw out a code and bad idle. From experience, don't replace a coil until you check the connection. Replies to this message: jay456 (Jun 27, 2008 4:49 pm)
#58 of 82 Re: misfire [pman9] by jay456 Jun 27, 2008 (4:49 pm)
Replying to: pman9 (Jun 11, 2008 12:49 pm) try to get to it this weekend, how do i go about fixing it if this is the problem
#59 of 82 by pman9 Jun 30, 2008 (8:29 am)
Be careful cause they can be very fragile after a few yrs. Check the connector that hooks to the coil. You should be able to push the plastic down with your thumb nail and slide it off. When you get this off there should be a colored (gasket) o-ring inthe connector itself. Make sure it hasn't slid back. Use electric cleaner and spray into it but lightly. Let them all dry and hook them back up. Make sure you diconnect your battery before you start. so that it will rescan the code. Good luck
#61 of 82 MAF diagnosis a year later? by lsv8girl Aug 11, 2008 (2:28 pm)
How about this, guys? I know little about cars - just what guys at work talk about. My 2000 LS (V8) started off by not accelerating when getting on the highway, had the "computer" reprogrammed 2 or 3 times. The guys at work suggestedthe MAF sensor could be going, but I didn't mention it to the dealer, I figured it was their job to tell me the problem. It was ok a few months, then noticed a drag when accelerating from 40 to 45+ - basically at 42 mph regardless. Since I didn't really drive on the highway anymore, I decided to delay any further diagnostic until $ came in. Finally, the car stalled 2 mos ago at 43mph, and started after about 10 cranks with CEL. Dealer said 8th cyl misfire $450, brother-in-law (certified shop) said $350, so he fixed it. CEL again, shop changed fuel&air filters, & oil. Light comes back (lean exhaust codes) , dealer took air filter out, put theirs in, CEL driving off the lot. Took it in again today, now they say $1300, new MAF sensor and remaining 7 coils shot. No answer as to why those 7 were fine 2 mos ago! Any suggestions? Replies to this message: jetstang (Aug 11, 2008 7:48 pm) wmman (Sep 18, 2008 1:05 pm) rgnmstr (Nov 15, 2008 12:58 pm)
#62 of 82 Re: MAF diagnosis a year later? [lsv8girl] by jetstang Aug 11, 2008 (7:48 pm)
Replying to: lsv8girl (Aug 11, 2008 2:28 pm) You can buy the COPS on ebay for about $20 each, factory motorcraft pieces, not rip offs. I had a cop miss, and just replaced them all as I had a valve cover leak, after living with a miss for a month. I don't know how your coils could all go bad at the same time, but it probably needs them. You can replace the cops and plugs yourself with some basic hand tools and a little patience and save a ton of money. After that, have it rescanned if needed, then see about the rest of the repairs.

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