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Old 07-19-2012, 11:37 AM   #1 (permalink)
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Default engine trouble new to 4cyl.

I have a 87 sammy carbed all stock. i got it for 200$ and it was sitting in the woods. i have put new air filter new fuel filter new plugs new plug wires ran ok for a while never could break 50mph. I have been tooling around in it on our property and having a blast. my problem started when i took it out one night and got it to about 35 on our road and it cut out on me took it home finally checked the plugs and they were fouled so i replaced them and it started right up. took it out for a ride drove less than a mile down he road and it cut out on me again fouled the plugs again. any ideas or any help has anyone else had this problem. im hoping head gasket or valve guides leaking oil but im scared its piston rings? any other ideas and has anyone done a basic rebuild on these how much and where to get rebuild kits if neccessary?
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Old 07-19-2012, 11:53 AM   #2 (permalink)
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Does it smoke out of the exhaust? (blue=oil, black=fuel)

How long was it sitting?

Did you dump the old gas and change the oil in it as well?
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Old 07-19-2012, 12:06 PM   #3 (permalink)
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i was told it sat there for 7 years. before i drove it around i dumped all the old gas and put new in plus with a fuel treatment to get any water out of the system. along with new oil in the engine and tranny and transfer case. it does not smoke more than a 25 year engine should. (only during start up ).
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Old 07-19-2012, 12:11 PM   #4 (permalink)
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So...fouling the plugs without a visible exhaust smoke to any degree then. Odd.

Please define "fouling"...wet? Coked on crud? Black oily? Or???
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Old 07-19-2012, 12:16 PM   #5 (permalink)
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wet black oil covered
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Old 07-19-2012, 12:25 PM   #6 (permalink)
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any ideas on what to check next i've been reading up on this forum about valve seals and other things. next chance i get im going to do a compression test and then ill know how extreme my issues are. and then ill need to figure out what to do next
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Old 07-19-2012, 12:26 PM   #7 (permalink)
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Very odd (no smoke).

PCV valve changed?

Any piston "blow-by" as evidenced by vapor & pressure out of the oil fill hole when idling by chance?
(rings / cylinder bore issues).

Timing check & set too.

After that...compression check.
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Old 07-19-2012, 12:37 PM   #8 (permalink)
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Visual inspection down the oil fill hole. Sludge? (clogged drain-back holes, leaving oil flooding the top end / valve stem seal area).
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Old 07-19-2012, 12:41 PM   #9 (permalink)
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oil fill hole pressure? piston blow by? what should i look for for that kind of thing
and pcv valve change? are you saying to change that or to check and see if it needs changing
timing check (im new to these 4cly. i rebuilt chevy 350 but thats extent of knowledge)
should i pull the timing cover and see if the cam and crank gears match up or check and see if the belt is the problem( if so will the haynes manuals tell me what the indicators for the timing marks are/ should be)
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Old 07-19-2012, 12:45 PM   #10 (permalink)
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Quote:
oil fill hole pressure? piston blow by? what should i look for for that kind of thing
Quote:
evidenced by vapor & pressure out of the oil fill hole
Quote:
pcv valve change?
Clean it, or easy / cheap...change it.

Quote:
timing check
Ignition timing. Do you have a Zuki Service Manual?
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