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Old Nov 10, 2009 | 06:37 PM
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FEESHON!!!'s Avatar
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New Guy Needs help

Ok , here goes -- hi everyone my name is lance and i live in Portland , Oregon . I like to fish and not work on cars . I have limited tools and am not a mechanic , but inclined . I have a 1991 f150 with the 6 . i have had this truck for alot of years and it never breaks . I changed the oil , put in coolant , and changed the plug wires . also new battery today . After doing all seemed good and then sputter , pop , pow , smokin , . to keep it going I had to spur the pedal and hang on . It will run a little longer than 8 secs but man . Where and what went wrong , endless I guess . When it quit the other day I thought I was out of gas . Put gas in and thats when it all went sour . Can someone help with some comments .
 
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Old Nov 10, 2009 | 06:41 PM
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ummm, bad gas?
 
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Old Nov 10, 2009 | 06:49 PM
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Did you mix up a plug wire on the tune up? Just a thought?
 
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Old Nov 10, 2009 | 06:50 PM
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are the plug wires on in the correct order?

is cap/rotor new also?

plugs? what brand/type?

what brand is everything?
 
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Old Nov 10, 2009 | 07:14 PM
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Originally Posted by quicklook2
are the plug wires on in the correct order?

is cap/rotor new also?

plugs? what brand/type?

what brand is everything?
Wires = Bosch from knechts , plugs are old , didnt replace cap / rotor I can say the truck ran fine all the time up until I started monkeying with it . I put 5 gal new fuel using the front tank does anyone have a diagram from cap to plugs . And also , it is smokin real bad smelling kinda gassy , it never smoked before . I pulled the plugs and they were real dry ,maybe to dry ? just a thought ---- thanx
 
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Old Nov 10, 2009 | 07:16 PM
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Fuel pump, Filter?

Blown Head Gasket? Why are you using coolant?
 
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Old Nov 10, 2009 | 07:42 PM
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Originally Posted by g_k50
Fuel pump, Filter?

Blown Head Gasket? Why are you using coolant?
Forgive me if Im an idiot , I drained the radiator and put 50\50 prestone . Was that a boner move ? I thought it always had coolant before . Please enlighten me for I do make some dumb mistakes . I replaced the fuel filter . I'm just stumped . Fuel pump could have failed . thanx
 
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Old Nov 10, 2009 | 09:26 PM
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All 4.9 engines have a 153624 firing order.

get a manual.
 
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Old Nov 10, 2009 | 11:50 PM
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Sounds to me like you just mixed up the firing order on your new plug wires.
It is the only modification that would cause these symptoms and it is more then likely the problem.

Firing order 1-5-3-6-2-4



Good luck!
 
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Old Nov 11, 2009 | 12:01 AM
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I wouldn't be concerned with head gasket just yet.
a 50/50 mix of prestone is fine. Remember that water rusts metal!!
If it all started when you tuned it up, then likely you took a wrong turn somewhere.
By your described running condition, I would also suspect that you may have put the plug wire on in the wrong order. The correct order is indeed 153624, so double check that.
Here's a pic of the order, since I'm assuming that if you had a manual, you wouldn't of asked.....that's what were here for.

Did you remove cap & rotor?
You say you put 5 gallons of gas in the front tank.....???
....Do you not normally use the front tank?...Why did you state that?
Since the plugs worked fine, i'll assume that is not the problem either.

I'd check the order of the wires and let us know what you find.
If you've not touched anything else, than I'm not sure what could have caused the condition, unless it's related to the gas somehow. In this case, hope it's just something you did wrong.
Either way, we'll need more info
 
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Old Nov 11, 2009 | 12:02 AM
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Doh!.......
 
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Old Nov 11, 2009 | 12:07 AM
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I wonder, was that "Doh" because you posted pretty much was I did right before you? :P

There you go it, three different people suggesting the firing order and two of us posted a picture.
 
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Old Nov 11, 2009 | 11:21 AM
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with the correct firing order and the fact that most caps have #1 marked a picture is not really needed.
 
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Old Nov 11, 2009 | 12:50 PM
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with the correct firing order and the fact that most caps have #1 marked a picture is not really needed.
The diagram helps if you do not know the direction of rotation on the distributor since the '91 does not have a vacuum advance to point it out for you.
 
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Old Nov 11, 2009 | 01:05 PM
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it is the hold down points that is important, not all vehicles have vacuum advances.

if removal of cap and temp. cranking motor to find rotation order is to much to do, then working on the vehicle should not be allowed.
 
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