about the car:
Pontiac 350
orig 2 bbl now 4bbl (Rochester Quadrajet)
HO heads
single exhaust 2.25 (sadly)
TH 350 Auto
2.56 open diff (sadly)
My problem is an acceleration issue.
either rolling or from a stop
when I give it between .25-.75 throttle,
the engine stumbles, pops out the exhaust, hiccups, and makes a scene.
But, give it full throttle and it runs like a top.
It has a new fuel tank, filter, and carb.
the fuel pump is probably original
The HO heads put the engine right on the verge of detonation and I've retarded the timing a little as a saftey precation.
I'm thinking that the problem is with the single exhaust and maybe the fuel pump. I'm hoping it's got nothing to do with detonation as a higher octane fuel is not readily available to me.
can someone confirm my diagnosis and/or give me any other ideas?
Thanks
Pontiac 350
orig 2 bbl now 4bbl (Rochester Quadrajet)
HO heads
single exhaust 2.25 (sadly)
TH 350 Auto
2.56 open diff (sadly)
My problem is an acceleration issue.
either rolling or from a stop
when I give it between .25-.75 throttle,
the engine stumbles, pops out the exhaust, hiccups, and makes a scene.
But, give it full throttle and it runs like a top.
It has a new fuel tank, filter, and carb.
the fuel pump is probably original
The HO heads put the engine right on the verge of detonation and I've retarded the timing a little as a saftey precation.
I'm thinking that the problem is with the single exhaust and maybe the fuel pump. I'm hoping it's got nothing to do with detonation as a higher octane fuel is not readily available to me.
can someone confirm my diagnosis and/or give me any other ideas?
Thanks
Feb 7, 2006 at 4:26 PM