Question about 1993 Jeep Grand Cherokee

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I CHANGED MY SPARK PLUGS ON MY 1993 BIGHORN ISUZU PETROL, ONE OF MY SPARKS WAS COVERED IN OIL, CAN YOU TELL WHAT COULD BE CAUSING THIS?

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Ad piston rings may be the cause of oil on the spark plug. what happens under normal operation the oil that lubricates and cools the cylinder walls is getting on the other side of the piston, where the spark plug is and covering it in oil. A good test for this is a compression tester, this will tell you if it in fact is piston rings.

Posted on Apr 27, 2010

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I have overhauled engine for Isuzu bighorn 1998 petrol/gasoline engine. the 6VE1.timing belt is ok. Still it has a had start.


is this the Single head cam or twin version?
no photo of engine, so answers will be weak.

double posted. is this the single cam or twin cam engine?????? per side, the twin cam has 4 cams. 2 /bank.
i can not understand your questions, at all.
ok you overhauled the engine,
nor can i understand , still hard start.
does that mean it cranks slow and turn runs and drive perfectly ?
or cranks fast, but hard to start and runs perfectly?
or does that mean it cranks fast, starts, then misfires and runs crapppy-pappy?
hark, the devil really is in the details, no?

Generic answer.
all the wires and sensors , hoses not put back correctly.
oil full, coolant full, fresh gas in tank,
then you crank engine with no spark (I pull fuses)
and the crank it until oil pressure is good. yah, do that.

if really savvy, we check for top end oiling next. cranked only.


ok looks like oil pressure is good,(I don't want to wreck a new engine) (also check compression on a new engine, to see if we messed up., if not 150psi or more, you timed it wrong)



then we crank it, ok, it cranks and don't start
I check spark and it's timing using my timing light, it's wrong, i retime it, no and its ok. as is ..
ok sparks good, on all 6 cylinders. checked carefully and for static time.

so now start engine on test fuel,
if fails, see above for why.!
ok it runs for say 2-3 seconds and stalls. good.
We yell at the gas engine gods. O'BOY my engine seems to be OK ! progress....

next is fueling , ill stop now, as typing a book on fuel injection
is not easy here.
but fuel pressure is next. on all EFI engines. as is good fuel.
when did car last drive perfectly, 1 month ago,
10 years. what?
if long ago, the gas is bad. as are related parts all gunked up, like filters, and injectors.
and even the pump, or its sock packed in GUNK.
as you can see we have no history on the car, so.
really anything is possible. even vandalism.

btw we never just throw and engine in a car.
we check.:
1: compression, gee even sitting on a pallet.!
why install (6hr labor) a dead engine,?
2: then cranked oil pressure, spark/fuel off line.
same reasons.
3: then if all that is ok, I do check top end oiling now, if not any top end, the cams will not last very long. they will smoke and seize up in a flash.

this is how its done correctly, ask how.

Aug 20, 2016 | Isuzu Cars & Trucks

1 Answer

How much oil does a 1993 isuzu bighorn 3.1 turbo diesel take?


Not sure. easyest way to find out is call nearest autozone and they will be glad to tell you.

Aug 12, 2012 | Isuzu Cars & Trucks

1 Answer

Can someone tell my how to change an isuzu i290 spark plugs?


Can someone tell me how to change spark plugs 2007 I 290 Isuzu truck cannot get the cover off to get to the spark plugs

Mar 09, 2012 | Cars & Trucks

1 Answer

1993 izuzu bighorn hard to start then dies like no petrol, when it does start blows black smoke like running rich ?


check injectors for leakage when engine off-will have to install fuel press gauge run engine and check press ,turn off engine and whatch gauge -see how long it takes for press to drop,will cause hardstart hot engine-but should start better cold

Sep 19, 2009 | 1993 Isuzu Trooper

2 Answers

Oil in the spark plug well on one plug/ back left


you are going to have to replace the valve cover gasket, the seal around the plug wells is leaking.

Sep 16, 2009 | 1993 Acura Legend

1 Answer

Oil leaking into sparkplug chamber


thread dammaged in head causing spark pug to come loose can fit heli coil to fix thread in head so spark plug wont come loose and leak oil into tube. other places oil can come from to cover plug in oil
remove rocker cover then remove spark plug tube they are screwed into head and clean thread of tube and apply sealant loctite to thread refit to head and may pay to replace seal for top of spark plug tube that is in rocker cover
one of these or both can leak, if tube is tight in head it may not be leaking the top seal is

Jun 04, 2009 | 1993 Isuzu Rodeo

1 Answer

Canadian standard replacement headlight for '93 isuzu bighorn


it is more than impossible to find them used, you may have to buy them new from the dealer, tell them what you are doing and they can sell you the correct assembly.

Nov 26, 2008 | 1993 Isuzu Trooper

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