Help help

[garzarigo]

I have a 1997 gmc sierra k1500 4x4 I'm having a big issue truck drives fine when I press gas pedel light but when I press down half way or more truck boggs down and will not pick up only code I get is a o2 sensor ice checked fuel pressure and its good changed tps sensor cleaned maf sensor and changed fuel filter has fresh tune up not sure what it could be any help would be appreciated

 

[spamaster]

Catalytic converter clogged?

 

[garzarigo]

Catalytic converter clogged?

I have no catalytic converters

 

[garzarigo]

I have no catalytic converters

And only code I get is a bad o2 sensensor

 

[98trck]

i had that code once on my '98 maybe its a bad connection
unplug and plug all of the o2 sensers that's what I did and no more code
when each is unplugged look is the connecter corroded or dirty.... clean it

another possible issue fresh tune up
my truck had a miss/shutter when I replaced cap n rotor
I noticed the burn mark was all on one end of the rotor
my distributer was out of phase
when you press the gas peddle down fast ignition timing makes an extreme move at once
and the rotor becomes miss aligned to the cap
I had to rotate the distributer alittle it made a big difference how my truck ran
.....all for the Good....
PETE

 

[98trck]

if I remember right there were three o2 sensers on my '98
one at each exhaust manifold and one at the Cat

keep us in the loop whether good or bad