GV = Grand Voyager, sure, 3.3L sure V6 , the baby brother to my Jeep V6, 3.8L
Heads up the car has computer brain cluster. CCD bus networked
The speedo only works if the cluster tells it the live data from PCM
or fuses top cluster not blown (JB Fuse 2 not blown) or tranny VSS sensor is dead. (veh,speed, sensor) sorry no VSS ever killed any engine,!speed is MPH. live.
the car is old, and most cars that old have lots of hard failures
and were ignored, until the day of TOO MANY HAPPEN.
like the the adage, "the straw that broke the camels back" relived.
first off , my answers are USA only, except above.
1996 is the EPA year of new OBD2 PCM the runs the engine.
that means any scan tool here ,EVER MADE, works here.
16pin under dash OBD2 DLC jack
check all fuse first. cab and engine bay, all means ALL.
there are 50- causes of cranks but no starts. or stalls
I will not go and list 50 bad parts, I will assuME you want to
do tests. and will even buy tools (meters and gauges) to do so.????
most folks posting here only want guesses from the blind. sadly./
and to scan the PCM first (next after fuses checked) ok?
there are 3 game plans besides sell it dead.
1: do the tests
2: get shop to do it.
3: OR GUESS AND GO BROKE,
ONLY YOU KNOW YOUR GAME PLAN , AND NOT TOLD YET
In a real shop that loves his customers.
they will do the tests, and even do extra tests.
what if the tech run a full compression test and told you it fails.
or is near failing and will fain soon after he fixed that caused this engine dead now>>??? see how that works? He is your friend
(as in gee the repairs are over the value of the car now, dead)
$3700 running used and far less not. $1500?(econ 101 decisions)
Lets DO IT:
now the tests using tools. (100 years the same )
1: the compression test must pass over 150psi
the readings are done WOT, spark out and fully charged battery
wide open throttle , the readings are based 2 factors.
WOT wide open throttle or close. MUST HAVE AIR TO COMPRESS , the engine is and AIR PUMP.
varies,(engine good) by the CR of the engine, (compression ratio)
and the ALTITUDE, (if under 500 feet) we know what it reads for sure. a LEAK down test tool , is great too ,got shop Air?
I have all 3. and do both tools but on all DOHC engine I do only leak down. and off topic here.
so if that
old engine (no miles told) is good??????
what comes next. if scan tool told you spark is dead it is.
we test spark on all 6 not just 1.
are the spark plus 27 years old "OOPS
and last if fueling test. did the scans show a shorted injector?
fuel pressure is tested and most cars this old the FPR is no god
fuel pressure regulator(oops in the tank at pump , sadly)
MOST PERSONS CRYING COMPRESSION TESTS ARE NO GOOD
NEVER EVER DID IT THE CORRECT WAY OR
DID NOT COMPENSATE FOR ALTITUDE IN DENVER. CO.
ASK HOW, DO KNOW HOW.
NO THE LEAK TEST AND THE COMPRESSION TEST WILL
NOT FIND A BAD CAM LOBE. 1/2 GONE. SORRY WILL NOT!
IF FINDS BAD RINGS AND VALVES BENT/STUCK/OR BURNED, OR STUCK AND WARPED HEADS. valve spring broken happens
THE CYLINDER TO CYLINDER EQUALITY TEST IS SUPER GOOD. AS THE SHOP MANUAL STATED!
checking fuel pressure to spec, is last .
now watch scotty do the tests. (hoping engine is good,he IS)
watch him, the tests are simple and if lucky ,bingo.
https://youtu.be/064Ilsz8Fzg
my 3.8L does180 psi on all 6,near the same 90k on the clock
150 is good point ,,never 90.