Im having a strange issue that I cannot figure out. When i first got the car, It ran pretty good, but i knew it had more potential. So i swapped the plugs, they looked pretty clean but i had the new ones anyway and changed them. Performance increased a little, mostly in throttle response. While driving (racing) I missed third a few times and got wicked backfires (gun shot loud). As time went on, it started popping on engine breaking/loaded downshifts, so I changed the fuel filter and the wires. After doing the wires, it seemed like it sounded better, but still had the backfire/popping issues. SO I did the coil, and now it drives like ****, High RPM popping and breaking up, backfires whenever i let off the gas. High RPM sounds like popping and banging all over the place above 3000 RPM and doesnt seem to want to climb. Im running out of ideas besides the Opti, but didnt know what this item was wired into the coil. Any ideas?


Also just bought fuel pressure tester, and will post results TM

 

Have you had the ignition module inside the distributor tested?

 

im not seein the picture. check to make sure the plug wires are in the right places easy to get them crossed

 

I've never heard of that, its inside the optisoark?

 

Do an oil change and examine the oil for metal debris. This is sounding like a flat cam. An exhaust leak can cause the popping as you decelerate but not at high speed. At high speed an exhaust leak will throw the o2 sensors off a little but it will not buck and pop.

A bad opti usually will not cause popping through the exhaust unless it is not firing and the fuel is burning in the cat. This will throw a code on OBDII computers which will be on a 96 or 97. What year is your car?

Massey

 

allright what year is it and what motor?

 

Craby the motor is a LT1 but the year I am lost on.

Massey

 

I did them one by one but will double check when I do all m y diagnostics tommorow. Picture was an attachment, and shows a taped up relay looking box with black and white wires going through it

 

93 LT1, cats are removed and straight pipe welded in. No known exhaust leaks, just minor pin hole where the welds are, that I will patch up later

 

Is it me or does it sound like the new coil was worse than the stock?

Idk if it could be caused from no cats And no mufflers ?

Idk if this could be hpening because no cats And no mufflers?