- May 11, 2015
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This is my first post on this forum and I'm really hoping you guys can help me!
My car has had a misfire for well over a year at this point and I'm now officially stumped.
Here is what is does:
-It misses at idle- It sounds like: normal,normal,bump,normal,bump. The tach drops a little each time.
-Misses horribly under load. If I take off it starts badly missing around 2,000rpms then clears up around 2,300rpms
-When cruising you can hear the same noise above.
-Loss in power and rich Idle.
Here's what I've fixed/replaced after noticing the misfire:
-New carb (holley 650 ultra dp)
-New fuel pump (holley "red" pump) 6.5psi and fuel filters.
-New plugs, wires, distributor. (HEI and getting 12+ volts) Yes, I'm using the correct firing order.
-Rebuilt the entire top end.
-Set timing at 13 degrees initial. (messed with timing many times with same results)
-New alternator (130 amp)
-New exhaust
-Checked for vacuum leaks with carb cleaner and couldn't find any.
My cars specs:
1989 Mustang Notch
302 HO Carbed
T5
3.73 rear end.
All new suspension (SR performance springs, Koni shocks and struts, tubular uppers and lowers)
Someone please lead me in the right direction as I'm out of ideas. Thanks!
My car has had a misfire for well over a year at this point and I'm now officially stumped.
Here is what is does:
-It misses at idle- It sounds like: normal,normal,bump,normal,bump. The tach drops a little each time.
-Misses horribly under load. If I take off it starts badly missing around 2,000rpms then clears up around 2,300rpms
-When cruising you can hear the same noise above.
-Loss in power and rich Idle.
Here's what I've fixed/replaced after noticing the misfire:
-New carb (holley 650 ultra dp)
-New fuel pump (holley "red" pump) 6.5psi and fuel filters.
-New plugs, wires, distributor. (HEI and getting 12+ volts) Yes, I'm using the correct firing order.
-Rebuilt the entire top end.
-Set timing at 13 degrees initial. (messed with timing many times with same results)
-New alternator (130 amp)
-New exhaust
-Checked for vacuum leaks with carb cleaner and couldn't find any.
My cars specs:
1989 Mustang Notch
302 HO Carbed
T5
3.73 rear end.
All new suspension (SR performance springs, Koni shocks and struts, tubular uppers and lowers)
Someone please lead me in the right direction as I'm out of ideas. Thanks!
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