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1991 Cadillac Seville has 'misfire'?
My Cadillac (4.9 L V8) has a misfire and blows air but it doesn't get hot or cold. I've taken it to two different places for diagnoses and they say it runs 'rough.' The misfire happeneds and then it stops misfiring. The ride is smooth but the motor doesn't seem to have a lot of power for a V8 could it posiblly have something to do with my pistons? IT ISN'T A HEAD GASKET
I have repleaced the following:
02 censors
have a new cat converter
have replaced injectors
did a tuneup and cleaned the motor PLUS added brand new oil.
It seems to leak water but in small amounts. The mechanic are stumped. Might I add I am loosing coolant.
Any info would be great, I've had this car for almost a year and it hasn't ever passes emissions.. It's my first car but it is rather nice for it's age so I want to figure this problem out and go cruise around. Thanks guys!
1 Antwort
- wayneLv 5vor 8 JahrenBeste Antwort
You said you just changed to new oil,take a good look at the oil make sure it is not changing colour to a slight milky look,as you said it is leaking water but not sure where from.If water was getting into your engine ,combustion, when you did tune up ,did you check the colour and condition of your plugs,that is critical,as that will tell you what your engine is like.If you did not. Remove plugs and take a good look at them,do it cold day after you used it and number and mark which plug comes from what cylinder.should all be same colour light tan colour,clean and no deposits etc.or moisture.
Quelle(n): Classic car restorer 41 years.
