Help

[robert2006]

Ok i have a 84 firebird with a 2.8 i just changed the spark plugs but not wires i got on the freeway and when i went to 5th gear it felt like it was slipping and back firing what could this be

[81DaytonaPaceCar]

It only does it in 5th gear?

Does it do it throughout the RPM band?

[Phantom409]

Ya, we need more info please

[robert2006]

help me

when i get in 5th gear it back fires only 5th gear
some times i can drive in 5th for a littlww while then it starts back firing it blew the lid off the air cleaner man i need some HELP

[1slo_camaro]

could it possibly be your shifting into 5th gear to low and its loading the tbi, carb. up with gas? thats essentially a ticking time bomb there if thats what your doing. other then that idk why it would only do it in one gear. unless you have a problem in the trans or some weird shit like that

[1BADAIR]

high load conditions(5TH) will show miss conditions. Primarly plug wire issues. make sure the wires are all clipped on. If they are old you may want to change them

[2002Z4CSS]

If the problem just happened after changing the plugs, check them for a cracked plug or bad wire.

[robert2006]

ok

i changed the spark plugs wires and distrabatur cap and it still does it back fires in 5th gear

[ezcruisn71]

If the problem just happened after changing the plugs, check them for a cracked plug or bad wire.

If you dropped a spark plug before you installed it there is a very good chance that the insulator shell got cracked. Also if your spark plug socket does not have the rubber boot inside of it you can easily crack the insulator when installing the spark plug.It is very hard to see these cracks in the spark plug. Also check the spark plug gap and check to make sure your firing order is correct.