i really can't just turn over the car to a dealer and say fix it. pride and
the last time i did that it effectively cost me $1300 for a new battery
they will take advantage of us
this time i noticed overnight a fluttering of performance as if one cylinder
i chked the plugs and found oil leaks from the valve covers onto the plugs
cleaned them and problem is still there
chkd for vacuum line leaks; none that i could see
then on the 3rd day, the Service Engine flashing lite, sometimes
chkd code: 42 timing
added info: years ago my gas mileage numbers were screwed up, but didn't
care, unless it meant ECM bad.
pls, tell me i don't have to hand my baby over to them and that i can just
buy a $25 part (still laughing myself) and plug it in to solve all problems.
let me ask an easier question
i have platinum plugs in it which are supposed to last a lifetime. could a
broken or faulty plug give a code 42 spark timing err?
i chkd a couple of them and they looked fine, but it has been 15 yrs for
thanks, i did chk the wires and found the oil from valve cover leaks
tightened them, and cleaned off the wires which look fine
cleaned the plug connections (in and out) and outside of plugs for oil
problem still there
will replace plugs with new platinum unless there is now an improved plug
for the '86
not looking forward to this task, esp right side, esp back one.
what in hell were they thinking?
at least we don't have to remove the engine to get to the back ones
always do the easy and cheap stuff first
put in sp wire, dist cap, coil, rotor, plugs, electronics points module and
the ESC all connetions to ALL SENSORS.
there is also an external timing 'set' connector, used when setting the
put in new parts one at a time and check results
don't ignore things like bad fuel, fuel pressure,
I chased a an intermittent sp wire for 2 years.
if compression and vacuum checks shows the engine ok, fuel and pressure ok,
wiring good, the only thing left are senors and ecm
if it was the ecm your car will definately not run
There is also
I have to disagree with this from personal experience. I had an
aftermarket chip go flakey on me after having it for 8 or 9 years. The
car would run perfectly, then suddly surge, rumble, hesitate, and
sometimes cut off. After going through several checks, I finally got
down to the chip and put the stock one back in. Poof! problem solved.
i have the Chevy manual
there is a flowchart for err 42 elec spark timing (EST)
and it seems to be dependent on whether the problem is intermittent or not
and from this it will be either the ignition module or ECM
a few years ago i had a code 44 err, lean exhaust indication and snugged
up all vacuum lines and the problem went away. don't know if this has any
bearing on the case at hand.
off to change the plugs, see above, got plenty of beer and cuss words
i only chkd a couple of them, so looking at all of them should tell me if
one or two are not firing
Eventful afternoon in Seattle
stage 1 4 plugs 4 beers and naturally i took the easy side first, the
left. front to back: 1 and 3 were amber; 2 where there was an oil leak
from the valve cover, VC, above it was a little bit more brown, but
however, 4, back left, was heavily oiled, maybe fired.
about this time neighbors who didn't even know me stopped by to laugh at my
attack on the right side physical impossibilities. Something about who do
you think you are going to pick up in that car at your age, .... 65. Even
asked if i remember why i chased nice women. i kept working and explained
that i did buy it 20 yrs ago.
which brings me to this: i had an '84 that all kinds of problems cropping
up, but i was forced into getting the plan to take care of ills (and that
was a salvation on a new model). But, i did decide (made too much money
then) that i needed the '86 which had the right brakes. better car, but
Back to the right side joke. turns out that most of the problem is the air
conditioning. there is a oblique strut support for stability that forces
the air unit 4 inches to the proximal which screws us good guys up. Design
people should be forced for at least one year to work on their cars to see
what havoc they have wrought.
but i digress, back again to the right side joke. i really want to
complain to the SOB that made the plugs so tight. Oops, that might be me.
Maybe, the heat and time made them that way.... sure.
More beer to keep me calm, but the cuss words, quietly at first, just
spilled out. the upshot of it was that the right side back plug was caked
with not just oil, but sludge - this plug was not firing. the front 3 were
Now, why does this happen? this is a design problem. the back plugs have
to be the hottest and have always been a problem since racing began. why
are we seeing this in a production car? why aren't we told of this? why
isn't there a fix?
i am also on my 3rd alternator replacement in 31K miles have we been
screwed for trusting them?
did it run better? yes. but, not perfect. 90% better. wires?
thanks for all your help and i hope it continues with this added info to not
only help me but thousands of others who read this N:L. keep up the good
All parts have to be somewhere, some go on first and some go on last, the ones
that have to be fixed are in the middle. Would you have bought the car if there
had been 8 plugs in a row down the middle of the roof so you could stand up
straight and change them?
Not to gripe about the plugs on the 'vette. My bride's land barge has
to have a motor mount pulled to change the serpentine belt--plug change
is recommended as 'associated maintenance.'
'89 Hookercar '02 e-blu coupe
Don't remember ever driving a straight 8 that had any vibration and that's all
my Dad had until he got the '56 Pontiac (Yes, I know they came out in '55 but he
didn't have one.). They sure did require a big roof though but it was no bigger
than my Chevy coupe. Now if you really want a big hood how about the 70's
Guess I just remember being a passenger in an old Buick that had a lot of
steering wheel shake at stop signs or at idle. What days those were to be a
kid. You often got to ride in the front seat, and there weren't even any
seat belts. How'd I survive?
A friend in my college years had a Chrysler Newport. Probably 2 or 3 feet
from the front bumper to the engine block. Talk about a land barge...
That may be the difference, my Dad never was at idle. Even when he rolled the
Bull Durham cigarette while driving with his elbows. He always said that the 55
MPH speed limit was for driveways. He passed away two years after they made the
speed limit 55 and I think it brought on his hearth attack along with the
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