1989 gmc

[gordeee]

so i have a89 serria idles fine but when you get on it it boggs it almost stalls i put new fuel filter ,fuel punp strainer ,plugs wires cap fuel pressure reg ,adjusted timing and it still boggs any ideas?

[2000CAYukon]

Clogged cat, timing chain, bad coil, bad injector(s).

Can you even get up to speed on the freeway?

//2000CAYukon

[gordeee]

i think i can get it up to about 25 new cats

[2000CAYukon]

Check fuel pressure is within specs (9 - 13 PSI)

Timing chain or maybe ignition coil, just a guess.

In neutral, can you rev the engine?

//2000CAYukon

[gordeee]

revs fine in netrual and park as soon as you start to accelerate it boggs