A while back I had posted a message about my van, when ever it would get
moisture in the air or rain and snow, my Van would act as if it were flooded
and it would miss severely. On of the reply's that I got told me to do a
tune up and change the plug wires and the cap. I did this and yes it was
really bad. But the other day it was moist again and it acted up again. Now
I'm at a loss for what to do next.
Is there any any out there that has experienced the same thing in an area
that gets moisture often? If so what could be causing it?
Please let me know, thanks.
I also have a 97 Astro.
Did you use Silicone Dielectric grease for the spark plug wire boot ends
before placing onto spark plugs?
Due to the exact fit AC Delco Distributor Cap, AC Delco Rotor, and AC Delco
Wire Set are all very expensive dealer installed, I have been told as a
d-i-y to be especially careful not to purchase any of the aftermarket wire
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I have installed aftermarket wires for a number of years on GM vehicals.
I perfer to use Accel brand spark plug wires, and make custom wires for cars
& trucks I install them on. When I had my 87 Astro I was running an
excessive wire for it. 8.8 MM veriboot wires, with Spiral cores. This
actually helped with the #4 cylinders problem with fouling plugs. Not to
mention the longer boots put the wires further out from the exhaust
manifolds. The stock wires had a problem with burn thru on Cylinders #2 &
I also use Accel Cap & Rotor kits, when availible. Other then that I
only use AC-Delco ignition parts on GM cars.
My yahoo mail fritzed out and deleated the mail when my reply failed.
since I had copied it to word, Ill just post it here.
you worte to me:
*You had posted a request for a answer for :a 97 *Astro drivability
problem not a 87 Astro. For what it is *worth I used to own a 85 Astro.I
had tuned it once with *aftermarket parts and afterward it had no problems.
I mentioned my 87 Astro as it was a non stock vehical when I parted it
out. While some have speculated as to what I did to it, that's a trade
secret. Lets just leave it at sub 15 second 1/4 mile times. When it was less
then 3 years old it had aftermarket parts on and in the engine.
*I didn't mention in my previous post about using AC-*Delco Platinum spark
I do not like platinum tipped spark plugs. I Brass or Copper core with a
the same for the electrode would be best. For Preformance applications I
side cut the ground electrode/prong. I also Index the plugs. That is billed
at 1 hour per plug for that service.
*On my previous post, I stated briefly my experience on *this issue as a
Astro owner and not 35 years as a *wholesale automotive parts vendor. A GM
Service *Department Manager at another dealership had *mentioned about
problems with aftermarket wire sets *which I tried to explain simply
without a long *dissertation. That person mentioned correcting the *problem
by using the exact fit AC Delco wire set *seemed to be the solution.
I have bought all of two sets of AC-Delco exact fit replacement wires.
Not only did they not fit as well as the orginals, in both cases I have wire
burn thru from wires being too long and touching exhaust manifolds. I would
rather make a set of wires, that fit properly for a customer then install
wires that do not. I also do not like thin wires. Good spark is key to
keeping high milage cars burning clean, as well as winning races.
I used to buy Accel wire by the Spool. Then buy bulk Terminals and
boots. Then with my crimping dies in my vice, and a hammer, custom make wire
sets. A fully custom fit set of wires by me is billed at $150, with a 5 year
*There are a few differences between the 1997 and 1987 *Astros. The 97 has
the 4.3L Vortec Engine with *improved performance. The 87 is probably the
first year *for the 4.3L Throttle Body Fuel Injection.
Actually 1986 was. Erly 1986 models may have a carburator. 1985's did.
MPI/TPI came out in Astro RWDs in late 1994 or 1995. I parted out a 94 Asto
RWD that was TBI.
As for the differances, a counter ballance shaft in later motors,
different injection parts, and intake manifold. different heads. Same block
till the counter balance blocks came out. Even then you can use an old block
and have more vibrations. You can even use the aluminum parts counter block.
I used the 87 example, since the engine bay has not changed in the body
shell. Astro's have very little room to service.
*I had a miss and had the throttle body cleaned and a *100,000 mile
tune-upservice performed on my 97 Astro *at a Chevrolet Dealership with
*fit AC-Delco parts Fall of 2003.
The dealership is the last place I am going to take a high milage out of
warantee older vehical. As a parts wholesaler you can go to the parts
department and get the parts from them for around 30% of retail roughtly.
*Presently, I now have about 115,500 miles and have *had no problems.
Mine went over 300K miles.
*I remember looking at the Accel tune up parts and *decided they weren't for
me due to only being spec'd for *a S10 with a 4.3L.
Well then I don't think you should brag about being a parts wholesale
person with 35 years under your belt. Since that distributor cap, AC Delco
Part Number D328A fits:
1995 to 2004 S-trucks (ALL 4.3)
1996 to 2004 Astro
1996 to 2004 C/K 4.3, Full Size Van
1996 to 1999 P-body/Chassis Van
Took me all of 3 minutes to cross referance that data. Not to mention
S-trucks had near identiacl 4.3's to astro's every year. Only Full size G &
P vans, and C/K trucks differ.
I saw a guy sell a car part once.
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