Got the Blues again

[lastdaze04]

:bigcry::bigcry::bigcry::bigcr y::bigcry:

I noticed Wed morning when I went to work that the car seemed to be acting not quite right. It has a regular miss,:bs: so here is what I have done to diagnose the problem so far, :(
1. checked my spark coming off the coils, all are sparking perfectly
2. just in case I was wrong I switched all coils from right side to left and the left side to the right, still acted exactly the same.:confused:
3. put new NGK-TR6 spark plugs in. No difference still running semi crappy.
4. did a SEAFOAM treatment thu the vacuum line untill she stalled out, one whole can used. Still runs semi crappy.:mad:
5. went to Autozone got a compression tester. All but one tested out to 165-175. one hit 75:mad2: and it was the 1st cylinder you see on the drivers side.

So those of you in the know, (that are mechanically inclined) please feel inclined to help me out as to what is going on here. All help, suggestions, and ideas will be appreciated.:help:
Thanks in advance
Rick

[ImpalaSlayer]

uhh stop diving NOW!!!! or else it is going to cost you much more money!

[1stMerc]

This should be in the manual for your compression gauge, but just in case it's not.

If compression is low in one or more cylinders, you can isolate the problem to the valves or rings by squirting a little 30 weight motor oil into the cylinder through the spark plug hole and repeating the compression test. The oil temporarily seals the rings. If the readings are higher the second time around, it means the rings and/or cylinder is worn. No change in the compression readings tells you the cylinder has a bad valve.

[ImpalaSlayer]

This should be in the manual for your compression gauge, but just in case it's not.

If compression is low in one or more cylinders, you can isolate the problem to the valves or rings by squirting a little 30 weight motor oil into the cylinder through the spark plug hole and repeating the compression test. The oil temporarily seals the rings. If the readings are higher the second time around, it means the rings and/or cylinder is worn. No change in the compression readings tells you the cylinder has a bad valve.


never thoguht of that. thats good info

[Pat]

There was some discussion about cam followers that came dislodged, you can take the valve cover off, easy enough on the drivers side, and take a look see. Should be apparent.

What happens, so it was explained on a recent post here, is that the engine is running fine when you turn it off, but due to cooling warpage the cam follower falls out so when the motor is started up the next day, bingo instant miss.

Really, I'm not making this up, it on one of the threads here but I don't remember which one. Maybe someone else does.

[Bradley G]

best of luck on the fix.I read the post Pat is talking about too.Maybe that can help you solve this.

[Black_Noise]

yeah, i wouldnt drive it untill you find out WHY the #1 cyl has such low compression, and my guess is bad rings. have you been running any harsh tunes, or do any crazy launches lately?

Like the others have said, if its not a ring, its gotta be a valve, the air is getting out somewhere.

You could also check the anit-freeze for oil, or vis versa to see if you got a bad gasket on the head.

[imorb1994]

i would reference FASTCAR's threads to me it sounds similar
http://www.mercurymarauder.net/forums/showthread.php?t=45745
http://www.mercurymarauder.net/forums/showthread.php?t=45952
http://www.mercurymarauder.net/forums/showthread.php?t=46037

[CKMustangCobra]

Leakdown Test. Any shop should do it for you for free.... that will tell you where the problem is.

Hopefully it isn't a valve seat.