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Author
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Topic: 85 mustang gt
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93 5.0
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Member # 12418
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posted
 
 
My buddy has a all stock 85 mustang gt 5 speed and he tried to smog it but it keeps burping during the test like a miss only at 2500 rpm he's replace the cap and rotor wires plugs and new cats anyone have any idea what it mite be before he goes and buys a new carburetor timing at 10 and plus are gap to 44
Posts: 230 | From: 209 | Registered: Sep 2012
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LXjames
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Member # 10791
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posted
Plug gap seems a bit tight try .052. Some manuals have suggested .044 but it's "not correct" per say
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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93 5.0
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Member # 12418
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posted
Would that make it burp like a miss
![[Confused]](confused.gif)
Posts: 230 | From: 209 | Registered: Sep 2012
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LXjames
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Member # 10791
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posted
I had 1 single plug that was under gapped on my hci notch and it caused a miss/thump in the exhaust while cruising on the freeway. Gap the plugs a bit higher and see how it goes
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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Martinna
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Member # 12493
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posted
Can you post the smog test sheet? The hydrocarbons will read high if the burp is a misfire. Does the timing advance okay? You always should run as little timing as you can get away with for smog. 7 degrees on foxes. Less timing reduces your hydrocarbons and NOx readings.
Posts: 1093 | From: City | Registered: Oct 2012
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93 5.0
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Member # 12418
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posted
I'm going to go over there night after work and check every out and look at the paper work
Posts: 230 | From: 209 | Registered: Sep 2012
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LXjames
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Member # 10791
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posted
quote:
Originally posted by Martinna:
Can you post the smog test sheet? The hydrocarbons will read high if the burp is a misfire. Does the timing advance okay? You always should run as little timing as you can get away with for smog. 7 degrees on foxes. Less timing reduces your hydrocarbons and NOx readings.
They will flag you at 7* timing. The car is supposed to have 10 dead on no way around it
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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93 5.0
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Member # 12418
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posted
Got it to pass gap the plugs to 52 and got a new coil and it pass thanks ca ford's
Posts: 230 | From: 209 | Registered: Sep 2012
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