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08-07-2013
Hey, I have a 1998 Grand Prix, and under medium to heavy acceleration the supercharger kicks on and makes a loud spitting sound and the check engine engine light flashes, it's throwing the "P1646D, Boost control solenoid control circuit" code. I honestly have no idea what could be wrong. Never dealt with supercharges before, any help is appreciated
08-07-2013
Flashing check engine light means possible catalyst damage.
Which useally leads to misfires.
If it was me I would replace all the spark plugs and replace the boost control solenoid.
08-07-2013
I just put new spark plugs in about a month ago, so ill probably pickup a boost control solenoid and see if that fixes the problem
08-07-2013
Which brand?
Also double check that none of the wires came off the plugs.
08-07-2013
AcDelco rapid fire plugs, ill have to check the wires too
08-08-2013
I checked on auto zones website and they don't have a Boost Control Solenoid, but they have a Supercharger Bypass Solenoid. Are they the same thing?Originally Posted by Fivefingerdeathpunch
08-08-2013
I believe so.
08-08-2013
these plugs? Ac-Delco-Rapidfire | AC Delco Plat/Spark Plug (14) | AutoZone.com
if so theres your problem, they are plats.
run copper core or iridium plugs.
08-08-2013
Platinum plugs are that bad? I thought they were recommended
08-08-2013
For some GM cars, the 3800 called for a Iridium style plugs from the factory.
The waste spark ignition system doesnt like platinum plugs.
08-08-2013
better question were does it say they are good on this forum? copper or Iridium work the best
Originally Posted by Bio248
Originally Posted by Kilroy
08-08-2013
nope, they suck in our engine. iridium i or copper core is the way to go.
the plats cause misfires, like your getting with the sputtering. its a misfire or 6.......
08-08-2013
Well I guess I'll try new plugs first then
08-08-2013
the iridium's will last a good 70,000 miles or more. the copper plugs 12 to 15,000 tops, the copper are cheap at 2 bucks a plug. people with a good amount of mods run the copper for the most part. all stock stick to the iridium's.
08-08-2013
or if you just got a replacement engine copper are best just in case the engine you got has mods and you didnt know. thats what i did and my car loves them
Originally Posted by Bio248
Originally Posted by Kilroy
08-08-2013
I run NGK iridium's in mine with the acdelco plugs.
08-08-2013
you use 2 different plug types at one time? NGk and acdelco are not the same company. pick one or the other.....
myself i use only ac plugs.
08-08-2013
Im guessing he meant wires.
Originally Posted by The Sunfire Guy
08-08-2013
personally i would love to see this he does say acdelco plugs
Originally Posted by Bio248
Originally Posted by Kilroy
08-08-2013
Techinically ACDelco plugs are NGK Iridiums...
just sayin.
Originally Posted by AmericanSoldier
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