just started when i left work today, started the car and let it idle for a few minutes like usual, when i started to pull away it started to miss real bad

no codes, checked wires for arcing and burns and they looked ok

its like flipping a switch as soon as it gets to 24-2500 it clears right up and runs perfect. does not do it at idle or very light load (just like an ignition miss) but i never seen an ignition miss go away like that. anyone have any ideas here, or seen this before

thanks in advance for any responses

 

mine started doing that - and got progressively worse and expanded to more rpm ranges. Still, when cold, it would be crisp and rev nice - until driving.

I just pulled the plugs - 6 were all fouled, and installed a Delteq. I guess my opti may have been crapping out and fouling the plugs?
It runs mint again with just new plugs - and the Delteq.

 

The opti from all i have been reading is the most obivious thing it could be. How many miles on the one in there? If like mine it has 100K+ might be worth a shot since it will go out sooner than later.

 

yeah it has 120k on it, but i dont understand how if it was the opti it would just go away after 2.5k

 

It's just a distribuor, cap and rotor with wear. They can do strange things - or just fail all together.
It may develop into more problems as mine did if you keep driving.

 

I had the same thing happen to my car, turns out a new egr valve and some seafoam was the fix.

 

i dont have a egr and everything in my motor is nice clean and new but thanks for the reply

 

ok i am not sure about this but it kinda sounds like i am getting really bad spark knock when it is missing

 

With a laptop and a cable you can see if it is having knock.

 

Scan it to make sure all sensors are reading correctly. I had a pinched wire to the MAP sensor, and it wouldnt rev past 2500rpms period. Not exactly same problem but similar I guess. You could push past the "blip" if you revved hard, but it didnt seem to run good uptop that time. HTH

 

it only seems to have this problem when it gets hot

 

I just went through the exact same thing. Started all at one time. Finally got it on a scope and saw something wrong with cyl 5. pulled the opti and there was obvious arcing beween 5 and the coil post. New opti and runs like new. All I really needed was the cap & rotor but I replaced the whole thing for insurance.