Lets see if we can tentatively diagnose this.. stumble at low rpms

maybe this pic is better
DSC01509.jpg
 
are you useing premium fuel? these cars need atleast 91 octane (i think)

make sure your not getting fuel at some old run down station, some dont take care of their tanks well.. just a precaution..
 
I switch between medium and low grade fuel usually with once in a while premium.

But in any case. Put in new plug. Put on now COP also. Runs great! Thanks for the help everyone.

edit: after a run around the block I think I have a slight miss somewhere but that was the big problem.
 
I say it still has a slight miss but the code doesn't come up. Is there a way to tell if there is a COP gone bad or do you need to just do 'trial and error'?
 
trial and error pretty much... I dont understand why people dont just run premium its only a few dollars extra per fill up.
 
I started on changing the spark plugs last night. One the right side the back spark plug was in the same condition.
 
Tony, as I stated yesterday, your valve cover gaskets are leaking, and oil is getting into the oil tunnels. You will continue to have this problem. This can cause your slight missing problem and not throw a code. It will get worse the longer it goes, and a coil will get destroyed. This may be worth an investment to a professional


photo 001.jpg
 
The valve cover gasket might be an small issue but from what I understand it's not going to cause a stumble.

What I've done so far is:
1. Change all spark plugs. Gapped at 54 ( autolite 764's )
2. change the fuel filter
3. gone through 2 tanks of gas
4. I had 2 COP's I pulled from a junk yard mark and I put them at different times on the plugs going around the plugs with no change. ( all the boots are new but I did inspect them when I did the plugs. )

5. I have a popping sound from the bottom of the car. maybe one of the cats are plugged up. That would cause this right? Here's a couple video's. Nothing great, kinda short and you'd need real speakers and not just computer speakers to even use the sound as it's a phone video.

YouTube- vacuum leak?
YouTube- vacuum 2

That sound you hear at the very beginning of the 2nd video started happening after I pulled the dash. Racking my brain trying to remember what I didn't plug back in.
 
that sound you hear in the dash is most likey from the airbag SRS system. eaither the bulb is out or something is wrong with it, as far as the motor sound, does not sound to good to me.. how many miles on her??
 
Daviddc114 said:
that sound you hear in the dash is most likey from the airbag SRS system. eaither the bulb is out or something is wrong with it, as far as the motor sound, does not sound to good to me.. how many miles on her??
Click to expand...

another video driving in traffic...
YouTube- miss 3

There are about 140k miles on the engine. You can't really tell from the videos but it's def. a miss. Either a COP or an injector. Minake has a 89$ diagnose and if they find anything wrong they use 50% of that toward the problem. I"m going to do that just to find out what the heck is wrong with it.

also I think there is a hole in the exhaust or a plugged cat or something.
 
here is what you can do, let it idle with the COP covers off the valve covers, while the car is idling you should hear see and feel it if it is missing, one by one pull each COP off, and then on again. if that cylinder is firing you will see / hear it get worse, if so put it back on and move on to the next one, when you find the one that does not cause an effect, you know that is your problem cylinder. from there you can check the COP, and or injector.. try swapping COP with another cylinder to see if the problem moves to that cylinder.. you will have to have patience and use process of elimination.. but the thing is USUALLY when the motor is miss firing it should throw a code / check engine light, sometimes it might not, but usually it does...
 
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