Excursion Misfire, need help, please.
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Excursion Misfire, need help, please.
I have a 2000 Ford Excursion, 6.8 V10.
Had a friend of a friend put a used F-250 V10 engine into my excursion due to blowing up my last engine. This engine is misfiring, and the man that put it in is totally clueless as to what he is doing. Took it to a shop, spent over a thousand and the misfire came back. Cylinders 1, 6, 7, 9, and 2 are misifires according to the computer. Supposedly the shop put new ones in, what are the steps I should take as far as fixing the problem myself?
Had a friend of a friend put a used F-250 V10 engine into my excursion due to blowing up my last engine. This engine is misfiring, and the man that put it in is totally clueless as to what he is doing. Took it to a shop, spent over a thousand and the misfire came back. Cylinders 1, 6, 7, 9, and 2 are misifires according to the computer. Supposedly the shop put new ones in, what are the steps I should take as far as fixing the problem myself?
FTE Chapter Leader
Joined: Nov 2010
Posts: 30,595
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From: N. IL
I use the 'brutal force' method.
Buy a new COP and one at a time, swap it with the others. Each time noting if it runs smoother. No doubt there are more intelligent "entirely satesfactory" methods - see the link below.
YouTube - Testing Coil-on-Plug igntion
Buy a new COP and one at a time, swap it with the others. Each time noting if it runs smoother. No doubt there are more intelligent "entirely satesfactory" methods - see the link below.YouTube - Testing Coil-on-Plug igntion
Fleet Mechanic
Joined: Sep 2002
Posts: 1,388
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From: Greensboro, NC
Cylinder misfires can be caused by plugs, coils or sometimes fuel injectors. Was the replacement engine running well when it was in the original truck? These engines like Motorcraft or Autolite Platinum plugs so that is a good place to start. To help narrow things down a bit, either swap coils with a known good cylinder or you can test them with a voltmeter. Here's a link which can help with the testing:
http://f150online.com/forums/lightni...-coil-pac.html
Do you still have access to your other engine and those coil packs? If so - I'd try to grab them all and you can use them for your troubleshooting as well. I know some people have tried the ebay COPs with good results vs. paying 45-70 a piece at the auto parts store. Here's a link: 00-04 05 Ford Excursion V8 V10 Ignition Coil 10 DG508 - eBay (item 350438706293 end time Mar-11-11 18:30:34 PST)
http://f150online.com/forums/lightni...-coil-pac.html
Do you still have access to your other engine and those coil packs? If so - I'd try to grab them all and you can use them for your troubleshooting as well. I know some people have tried the ebay COPs with good results vs. paying 45-70 a piece at the auto parts store. Here's a link: 00-04 05 Ford Excursion V8 V10 Ignition Coil 10 DG508 - eBay (item 350438706293 end time Mar-11-11 18:30:34 PST)
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I have New spark plugs, 6 new coils, new fuel injector connectors. I will swap coils to see if that is the problem. And no, unfortunately, the guy who put the engine in, stole my old coils, wiring harness and fuel rail and quite a few other parts , so I think I will proceed to buy new coils. Are the ebay coils trustworthy and reliable? Also I was told that The ECM could be the problem. The truck ran good for about 2 days after I got it out of the shop. then it all came back. Also it has Autolite platinum Spark plugs which are brand new. Is it bad that I have driven the truck like this for over a month now?
Elder User
Joined: Sep 2008
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From: Stafford, VA
I have New spark plugs, 6 new coils, new fuel injector connectors. I will swap coils to see if that is the problem. And no, unfortunately, the guy who put the engine in, stole my old coils, wiring harness and fuel rail and quite a few other parts , so I think I will proceed to buy new coils. Are the ebay coils trustworthy and reliable? Also I was told that The ECM could be the problem. The truck ran good for about 2 days after I got it out of the shop. then it all came back. Also it has Autolite platinum Spark plugs which are brand new. Is it bad that I have driven the truck like this for over a month now?
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