bad miss fire yesterday

[LT!freak94]

ok so i am headin to a junk yard yesterday and my car just out of no where starts to miss fire so i get home check all the wires and plugs nothing worng put everything back together and it runs fine take it for a test drive rand better then it did befor it started to miss fire and idea what went wrong but while i was out i fouond an 98-02 red with tan top ss and we bot got on it i kept up with him till about 100 then let go we stop he was like wow diddent think your car was that fast lol but any idea would be helpfull about the miss fire

[Batman]

Smells like an Opti to me......

[bad64chevelle]

Originally Posted by Batman

Smells like an Opti to me......

How does an opti smell when its bad? Maybe we could have figured out the problem with jOn's car alot earlier had I known that. J/P

Yeah sounds like it to me too

[LT!freak94]

ok smack me but whats an opti

[bad64chevelle]

The OptiSpark is pretty much the "distributor" for a LT1 engine. They are our cars worst enemy. They arent as bad as people make them out to be when replacing them, but they are a PITA.

[LT!freak94]

how bad and how much would it be to replace and if so what kind should i get if their are diff ones???

[bad64chevelle]

Well if you have the skills, then its not that bad, just time consuming. I picked up a GM replacement for 250 brand new. You could go with the rebuild kit or whatever it is, dont know how much it is, or if its even worth it. You will take off the Elbow, air intake, Water pump, fans, and a few other things off the front of the engine. If you need help let me know, and where youre located. It could be possible to work something out if you needed help.

[Fastbird]

NEVER replace just the cap and rotor portion of the opti. It's not worth it, especially considering the problem may not even lie in those pieces. It could be an optical sensor failure.

Replacing the opti is fairly easy.

Drain the radiator.
Remove the intake ducting, radiator fans, crank pulley, water pump, then opti. Once you have some experience you can have an opti out of the car in about an hour.

I believe the cheapest going rate for a new GM opti is from Jason Cromer at Sam Taylor Buick Cadillac. 877-726-8295 The 92-94 non-vented units goes for about $260-270 now.