i have a 1997 Z28 lt1. i took off from the light driving the other day and my car stalled and back fired. would crank but not start. so we rebuilt opti, replaced fuel filter, all seals and gaskets. Made sure timing chain was good(not off timing) but when i start my car it will start but very very sluggish. revs slowly, almost dies when you nail it, also back fires on way back down through rpms. keep getting cam pos sensor code,so we cleaned made sure it was lined up right and still having problems, do i need a new opti spark or what. already double and triple checked plug wires to make sure they were correct and they are. Only mods are headers, and hypertech power programmer, and over and underdrive pullies someone please help. Already took power programming off and still same problem. I NEED HELP

 

Which or where did you buy the opti? I'm on my third one since April when I bought the car. So far the NAPA one was crap, the two cheapo "just like AC/Delco" ones from eBay were crap, and I'm hoping the stock AC/Delco one works out, and so far it's running fine.

A lot of people in various forums say the Accel is crap and the MSD is hit or miss. The general consensus is that the best way to go it the real AC/Delco opti.

 

Its the same one we rebuilt it and put it back on new caps and rotors and it runs barly give it gas and boggs real bad and is tough to rev up so what works best

 

Have you removed your plugs and inspected them?

 

is the opti lined up correctly? I remember u have to mark the position of the old opti's spline and make sure the new one is in the same position, if i remember correctly. something like that...

 

Well since you put only cap and rotor on it and you are getting what sounds like DTC 16 lo res failure (at least that's what it is on OBD1, not sure for OBD2)...... looks like you need a whole new opti. Go to the dealer or call Sam Taylor in FL.

 

plugs and plug wires are brand new. and yea the opti is lined up right triple checked it. i do have a coolant sensor light on and it had been on since i bought the car and never had problems. so most likey i have to replace opti what is the best?

 

Stock.

 

The DTC 16 Low resolution failure...... will it turn on the check engine light and not give a code.

 

yes it does turn on a check engine light but it gives a code for a cam pos sensor. but every body that i talk to says car souldnt run as bad as it does just because of a cam sensor

 

1995's dont have cam position sensors do they or is that inside of the optispark......

 

His is a 97, so it would have a cam pos sensor.