I have a 1990 Mustang 5.0 and I'm having problems with the firing order. in the internet it gives me 1 3 7 2 6 5 4 8. but will not run smooth, backfires through exhaust and intake. I used the old ford firing order 1 5 4 2 6 3 7 8 and the vehicle runs better but still misses and has LOW power. can anyone help I am confused.. Have put in new map sensor and engine computer again please please help..car is stop no modifications
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Below are the firing orders for 5.0L, 4.6L, 3.8L, and 2.3L late model
Mustangs. Remember to be very careful when checking your firing order
ignition system on your car runs on very high voltage. Do not remove
spark plug wires from the distributor or spark plugs while the engine is
Firing order sequences:
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