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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

firing order ?,sss

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Old May 9, 2008 | 12:25 AM
  #1  
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atillett
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From: tom bean tx
firing order ?,sss

hello, ? is, did the 1988 5.8 have something different than the 1-3-7-2-6-5-4-8.........for some reason the po said something to the effect of having do run the same order as a 302, is that possible or would it even run on the 302 firing order????????.
 
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Old May 9, 2008 | 04:48 AM
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EPNCSU2006
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If it has a 302 cam in it, it would use the 302 firing order.
 
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Old May 9, 2008 | 07:07 AM
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The only way to know for sure is to pull the plugs and valve covers and look at the valve train as you rotate the crank.
 
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Old May 9, 2008 | 10:13 PM
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From: tom bean tx
well it is running rough and misfiring, at acceleration from a slow down, like a miss, and it sounds like a constant miss at idle. so i guess that i will be putting the wires back to 5.8 and see what that does.........i tuned it up using the old replace as they come off trick and it still runs like crap....so i will try and see if it helps it.
 
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Old May 9, 2008 | 10:28 PM
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Troubleshooting problems like this (called drivability problems) involves careful examination of parts and troubleshooting, not going off half cocked in any old direction. Only change the firing order if you know beyond a shadow of a doubt that it is wrong. Otherwise, look at cap, rotor, vacuum lines, sensors and other components with meters, gages or whatever you need to prove something is working or in spec.
 
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Old May 10, 2008 | 03:36 PM
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From: tom bean tx
sweet, the firing order was off, andddd, the difference is amazing, it is unbelievable the difference, when i took off in second gear, i almost broke my neck(well not really) but it was a whole lot quicker...and it was hard to keep it under 55. thank you to everybody.....
 
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Old May 10, 2008 | 04:03 PM
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amazing what the correct firing order will do.

amazing that the engine ran at all with the wrong firing order.

hope it was not running with the wrong order for very long.
 
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Old May 10, 2008 | 04:21 PM
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From: tom bean tx
i kinda think that it was not really the wrong firing order maybe just a few switched wires, idk, but i think it runs a lot better though........but i know that it was like that for a while though, but i drive maybe ten miles a week and it always didn't seem right for a 5.8. i am very much impressed, maybe for just a while as long as nothing else shows up....it just proves that you need to go by a manual and go by that instead of just removing and replacing as you go, if you don't know a lot about the truck when you get it..
 
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Old May 10, 2008 | 04:29 PM
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a couple of wires switched kinda means the wrong firing order.

glad you have it figured out.
 
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