That Chugging engine of mine...

[21stcenturygadgetguy]

It seems like my Mark VIII lost some power the other day, I was driving, and all the sudden I lost a lot of power--It runs, but like its fowling out, or missing on a cylinder. I brought it in to a mechanic I just met, (New to the area, my sources are limited) he changed the spark plugs, and it is still doing it. He said the wires looked fine, and so now I am wondering if it could be a vacuum line? Any help from you all would be great! THanks a TON!!

 

[mmtphoto]

any check engine light? still could be wires, just because they 'look' good doesn't mean they are-you could use an inductive timing light to see if they are all firing, and that'd tell you if you might have a coil pack problem too. I had that once in my 93, it came and went when i finally found it made all the difference in the world. The back plugs can collect water around the plugs and can cause a miss. or a bad boot might cause a problem.
It doesn't sound like a vacum leak, you'd probably have a higher idle, hear it hissing-if it's a dead miss, you might have valve/compression problems-eliminate ignition problems first. Good luck.

 

[unity]

Ls Crosse? Hey Rich, what ya doing this weekend! We should make a road trip to LAX!

Anyway, the wires *can* cause this. The coil packs *can* cause this. But for $12 you can get a vacuum gauge and test that first to rule it out.

Also, try getting a full tank of good gas - Shell premium.

 

[mespock]

I've been chatting with him in the PMs. We'll be working something out soon.

I have a set of 94 coil packs if he needs them.

As always you are welcome to come help out!

 

[Reaper]

top priority, (my mark did it too)

1.) Change the fuel filter (a must)

2.) if that doesn't help, then it might be the transmission, change the fluid and filter 2-3 times, and it should clear it up.

3.) if 1 or 2 doesn't help, beats me then.

 

[unity]

Good one, could be the fuel filter. For that matter, the fuel pump.

Dont think its the trans though at this point though.

A vacuum and fuel pressure test would be first on the list I think. Always need to listen to the patient breathe and see if it has a pulse

 

[21stcenturygadgetguy]

Thanks all! I just put in a fresh tank of gas, I was wondering if KwikTrip did me in...Not sure. I put a can of STP Gas Treatment in, didnt help. No check engine lights--