I have bad Rough Idle

1994 VOLVO 960
167,500 MILES • 2.9L • 6 CYL • AUTOMATIC
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ENNAHOJ
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I was using high octane fuel, i read i could use regular; i did one time, i do not any more. But since then its been running really rough; also, the coolant reservoir was pretty empty, i bought the 50/50 anti freeze, same color and then things started to leak all over under the car. I had the fuel filter changed; platinum plugs installed, new front struts, oil filter, air filter, oil change.
When i bought it used about a year ago, it ran great.
any help you could provide would be appreciated.
sincerely,
Ennahoj
May 24, 2016 at 10:06 AM
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HMAC300
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This may be a head gasket problem, have coolant system pressure checked for leaks, there is also a chemical they can add to system that detects leaks. you could also have a freeze plug leaking on side of block but a pressure check will be able to get that pointed out.
May 24, 2016 at 12:11 PM