car not revving

[greek_beast]

hello all,
i have an ef fairmont and the car doesnt rev past 4000rpmon gas or petrol when on full throttle...tried map sensor, 02 sensor, has high flow cat n 1 muffler installed about 1 year ago, when does happen engine sounds like its pingin on gas (very rattly) any1 came across this, any help would b appreciated

thanks steve

[[Sterling]]

Throttle cable maybe?

[greek_beast]

nah mate

[67rce]

Dude, your accelerator cable WILL be stretched.

[greek_beast]

nah mate it goes past 4000rpm when goin lightly on on throttle it only happens when full throttle

[Mr_4.0]

fuel filter, ignition timing, fuel pump, fuel pressure reg, blocked cat, smashed valve...........