scarface06

for a few weeks now, car seems like it's missing. Starts up ok, but as soon as I drive it, no power..hesitation. Almost feels like I only have 4 cylinders. Its a 5.0 89 lx. Changed the plugs, wires, and dist. cap & rotor. Seems ok at idle...but have no power at all when I hit the gas. Cats were rattling a few months ago, which leads me to think there clogged. Also, backfire through the engine compartment when I put it under a load. The exhaust seems to be flowing more through the left tailpipe then the right side. Car has just gotten worse and worse as time goes on. Timing is fine at 12 degrees, fuel pressure is at 32psi. Might do a compression test. Can a bad MAF cause this? If so, anyone know the size torx to get it off? If that aint it, I'll disconnect the exhuast

COMPMACH

You could try to clean the mass air flow sensor(wires).I'm not sure what size they are but its uses the taper proof style bits to remove it.My 95 gt had a dirty sensor and i had no power what so ever and it spark knock like crazy,so that could be part of your problem if not your problem all together.Hope this helps.

Tims 88GT

you could try cleaning the maf, but your fuel pressure needs to be 39 at idle with the vac off.

gspfunk

If you had problems w/ your cats, you might consider replacing your o2's. Bad cats can make them crap out in a hurry.

Tims 88GT

^^ why what happens to them? do they just get to hot?

scarface06

thanks for your suggestions guys...I'll start with the fuel system..then maf

scarface06

it was the MAF...cleaned the wires, UNBELIEVEABLE power now. I must have had this problem for years, because the car never drove like this. Gummed up with KN filter oil and dirt. Oh yeah, my fuel pressure is actually 39psi with the vac off, and 32psi with it on. Thanks for your help [8D]

ReVz

my cats are rattling now to.. are they clogged or wat?

GaryBisiniere

how do you clean the mass air flow sensor?