Pop, and boost spike under acceleration

VADER

Little engine that could
So, I finally got the car going after changing gas tank, fix fuel line in tank, mini starter (sounds weird vs orig), new front tires and battery. And a fuel filter
Take it out, seems to run fine but any slightly decent amount of throttle causes a pop and spike in boost. The spike is basically from being at -1 to 0 psi under throttle to a pop and spike in psi to 5 and then I let off. So, it's not under heavy throttle, I was thinking a hose is lifting up or a leak in lines.
I did a search and most think coil pack or module, plug wires.
Just wanted some thoughts before I start spending more $$. It did start to do this before I got everything replaced, but normally its floor it and boost slams to 20 psi plus.
Any thoughts, many things were replaced about 15 years ago but car has only seen maybe 2k miles in that time
 

Mr.Spool

Well-Known Member
So, I finally got the car going after changing gas tank, fix fuel line in tank, mini starter (sounds weird vs orig), new front tires and battery. And a fuel filter
Take it out, seems to run fine but any slightly decent amount of throttle causes a pop and spike in boost. The spike is basically from being at -1 to 0 psi under throttle to a pop and spike in psi to 5 and then I let off. So, it's not under heavy throttle, I was thinking a hose is lifting up or a leak in lines.
I did a search and most think coil pack or module, plug wires.
Just wanted some thoughts before I start spending more $$. It did start to do this before I got everything replaced, but normally its floor it and boost slams to 20 psi plus.
Any thoughts, many things were replaced about 15 years ago but car has only seen maybe 2k miles in that time
verify fuel pressure rise 1to1,and no hoses that are unclamped,ripped,and vac lines are secured.
 
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