Question about 1985 Ford F 250

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I have a 1997 f 250 hd with a 460 7.5 liter engine just had all the gaskets and plugs and wired replace but it rund rough and sometimes blowes white smoke

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White smoe is an indication of antifreeze getting into cylinder which can mean blown head gasket, cracked head or block

Posted on Aug 22, 2010

Testimonial: "Thank you very much now i had a garage do the work so if its the head gasket or head could it be there responsiblity to fix because they just replaced"

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My 97 honda accord is blowing white smoke and running rough then i went to start it now it wont start


Sounds like either a blown motor (rings need replaced) or a bad head gasket or cracked head.
If the rings are bad your car would have felt like it was losing power because the engine will no longer have the same high compression that it's required to turn the wheels. You may have heard your engine knocking or seen a light blue colored smoke coming from your exhaust as a result of your engine burning up oil in the combustion chamber from the rings leaking.
If your head gasket is leaking or your head is cracked you'd likely find milky looking oil when you drain your oil from water/antifreeze being mixed in and noticed a white smoke coming from your exhaust that is actually water vapor coming through the exhaust.
If your car was running rough when you last shut it off try pulling all of your spark plugs and either cleaning them or replacing them all. A bad head gasket or bad rings can both foul spark plugs. A car will run rough with 1 or 2 fouled plugs, but once enough foul it will no longer run at all just sit and crank over. If changing the plugs get's it started for ya, check your tailpipe first for water, if nothing, change your oil. If no signs of water/antifreeze or milky colored oil then it's probably rings.

Aug 27, 2012 | 1997 Honda Accord

1 Answer

Have a 2.5 liter and number 2 cylinder exploded. I replaced the entire engine including head, valves, spark plugs and wires. new engine ran a little rough and had a check engine light for a o2 sensor....


check the spark plug wires. go somewhere dark, get a spray bottle with some water in it, then mist the spark plug wire and look for a spark to jump

Sep 06, 2011 | 2000 Jeep Wrangler

1 Answer

I have a 1990 ford ranger xlt that blows out smoke from tailpipe its white with blue in it the mass airflow sensor doesnt do anything when un plugged it has a miss to its a 2.3 liter engine


Sounds like you have a blown head gasket - white smoke = coolant. Pull plugs and look for "steam cleaned plug" or for coolant in oil - looks milky.

Mar 20, 2011 | 1990 Ford Ranger SuperCab

1 Answer

1985 f250 with a 460 gas motor blows blue/white


Blue --is Oil
White- is Coolant

Bad intake gasket or head basket

May 04, 2010 | 1985 Ford F 250

1 Answer

Recently I had my 2000 gmc 2500 6.0 liter truck start running rough. I changed the spark plugs, checked the coil packs and replaced the fuel pumpand fuel filter. Still no change....Any suggestions?


ROUGH IDLING CAN BE CAUSE BY MANY THINGS.I AM LOOKING AT LEAKING VACUUM HOSES OR INTAKE MANIFOLD GASKET LEAK.DIRTY FUEL INJECTORS AND WORN ENGINE VALVES WILL CAUSE ROUGH IDLING.ALSO LOW IDLE SPEED CAUSE ENGINE TO RUN ROUGH.

Apr 18, 2010 | 2000 GMC New Sierra 1500

2 Answers

My ford 6 liter blows blue smoke under acceleration and while stopped at a stop light the compression was checked and all cylinders are good any ideas ???


Engine Smoking:
.
Black Engine running rich Possible Failure
-Map sensor, fuel injector or fuel pressure regulator.
Blue -Replace Faulty Transmission modulator valve
White Possible Failure. -Head gasket.
Hope this tip helps.
r/
David

Mar 10, 2010 | 2001 Chevrolet Silverado 2500HD

2 Answers

1999 buick 3.8, was running rough with white smoke.


white smoke tells me engine coolant is mixing with the combustion chamber. you have leaking head gaskets

Feb 07, 2010 | 1999 Buick LeSabre

2 Answers

98 Chevy Tahoe 5.7 liter engine cuts out and misses. It happens when the engine is up to operating temperature and under load. At idle - after engine is warm - it runs rough sometimes, but when it is put...


Have you checked for vaccume leaks?
You've got lots of parts in there, Has the problem been the reason you have replaced all of those, or did it come up while doing some of the repairs?

Dec 18, 2009 | 1998 Chevrolet Tahoe

1 Answer

Intermittent


Pull the spark plug wires out one by one and check for oil on wire. Sometimes the valve cover spark plug hole gaskets leak oil into the spark plug hole and causes a misfire. If oil found clean with brake or carb cleaner and blow out with compressed air. also when car runs bad listen under hood for snapping noise this would be spark escaping to ground somewere. In a dark garage you might be able to see the spark.

Feb 09, 2009 | 1995 Toyota 4Runner

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