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Old 11-17-2015, 08:03 AM   #1
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Popping under hood

Just bought my gf her first fox it's an 89. Tore it apart and changed all the gaskets because it had been sitting for two yrs. dropped the fuel tank got rid of the old gas and bought new tires. Everything else seems fine. Before changing the gaskets the car would occasionally back fire idk if that'll help with solution to current problem but now after changing valve gaskets and upper/lower intake gaskets once I turn it on it starts popping almost like its misfiring...or something is in the engine knocking around but we were very careful bout plugging the heads with towels.


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Old 11-19-2015, 08:36 AM   #2
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Start with the basics....


Correct firing order.
Run your codes.
Vacuum leaks (check 3 times).
Timing.
Dizzy (and related items).
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Old 11-19-2015, 10:21 AM   #3
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Checked, checked again and rechecked firing order because it sounds like it's misfiring but it's correct. Haven't ran codes yet or checked timing but I figured because I didn't mess with the distributor cap at all the timing would be fine. No vacuum leaks that can tell. Hopefully running my codes will give me an answer.


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Old 11-19-2015, 08:14 PM   #4
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And what's dizzy


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Old 11-20-2015, 01:13 AM   #5
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^distributor

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Old 11-20-2015, 03:32 AM   #6
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Remember too that the routing of the plug wires is crucial in the old 5.0 too.Click image for larger version

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Old 11-20-2015, 07:23 AM   #7
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I don't think they are routed correctly. I can check once I get home I never knew that


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Old 11-21-2015, 04:34 PM   #8
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Are you 100% sure you restabbed the distributer correctly after reinstalling the lower intake??Its easy to stab it 1 tooth off by accident.
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Old 11-21-2015, 08:25 PM   #9
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Quote:
Originally Posted by wbrockstar View Post
Are you 100% sure you restabbed the distributer correctly after reinstalling the lower intake??Its easy to stab it 1 tooth off by accident.

Now that u put it that way I'm not so sure...but when I pulled the dist out I marked it on the intake and dist with a small line and when I reinstalled I just lined it back up. At first I didn't mess with it at all but removing the lower intake seemed impossible without doing so


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Old 11-22-2015, 09:46 PM   #10
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You've probably get it installed correctly,but do the following to check its position::
Use some Witeout or Liquid Paper & draw a line on the balancer at the 0° & 10° spot.If you're standing in front of the car looking down at the balancer,mark the 10° spot that's to the right of the 0° spot,not the 10° spot on the left side of the balancer.
10° 0°* 10°*

Remove the coil wire(to keep the engine from starting)remove the #1 spark plug,hold your finger over the hole while an assistant bumps the ignition key to rotate the crank.Once you feel compression coming out of the plug hole,use a breaker bar & socket,manually rotate the crankshaft til the 0° mark aligns with the timing pointer.Now remove the distributer cap to see which direction the rotor is facing.It should be facing towards the #1 spark plug wire post on the distributer cap.It should be pointed in the same direction as the green line in the picture below,ignore the red line that's shown.If your rotor is aligned with the green line(thats shown in the picture below)while the timing pointer & 0° mark are aligned,your distributer is installed correctly. If your rotor is aligned with the red line while the timing pointer is aligned with the 0° mark,you've got the distributer installed 1 tooth off-retarded
After you check this,put a timing light on it,let the engine reach operating temp,pull the spout plug,check to make sure timing is set at 10°-14°.If timing is too low(<10°)or too high(>14°)adjust the distributer til its set between 10-14°,put the spout plug back into place,aim the timing light at the balancer and make sure it reads between 20-24°.This shows that the ecm is advancing timing correctly. You're done
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TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
Prochamber w FM
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Old 11-26-2015, 09:01 AM   #11
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Fixed timing, routed my spark plugs as it showed in the chart. So far so good everything sounds amazing! Thanks!


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Old 11-27-2015, 06:18 AM   #12
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Good to hear man
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TFS 190cc(stage ll)
TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
Prochamber w FM
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Old 12-02-2015, 02:57 PM   #13
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I LOVE happy endings.
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391 rwhp & 424 rwtq...Mustang Dyno 11.5@122mph
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