My car runs fine for about the first 60-90 seconds. Then it runs like crap. As if it has about 2 plug wires disconnected. It has a miss at all speeds and rpm's. I disconnected the 02 sensors and that didn't make a difference. I replaced the plugs 4 days ago and the wires today. Any ideas?

 

Is it in close loop when it starts to mess up? Could be O2's (they have to heat up).

Joe

 

It isn't the 02's and I hope it isn't the opti

 

What did the plugs look like? If they all looked the same(ok that is) look for a fuel or vacuum prob, if one or two look bad look for a wire or cyl prob(oil seal, broken valve spring). Only look to opti after all checks fail to help, plugs will be the main indicator of where to look.My missfire problem turned out to be a afr with a leaking vac diaphram and a cracked evap hose, after replacing opti and wires and plugs. Good luck

 

Check your coil while your at it. If you have to, swap coils with someone and see it helps. It doesn't take very long at all. Saves you money, instead of buying things that don't fix it.

 

My car is a 94 with 62,000. The plugs look fine other than me running rich because of this problem. I am hopeing it is the coil. I will find out tomorrow.

 

I put a new coil on it today and it didnt help. I am going to check the ignition control module tomorrow. I am thinking it is the opti

 

That sucks!! Hope it's not the opti.

 

Try that ICM first before coming to any conclusions.

 

I found out the ICM is good. I don't know if this would matter or not, but my alternator went out while I was driveing it the day before I started haveing problems. Could that have messed up something