Results 1 to 11 of 11

Thread: Correct Plugs/Wires for an Avanti Tuneup?

  1. #1
    President Member Lou Van Anne's Avatar
    Join Date
    Jun 2009
    Location
    Stockton CA
    Posts
    1,840

    Correct Plugs/Wires for an Avanti Tuneup?

    Plugs: #R45TS AcDelco Professional Spark Plugs
    Wires: #608D Tailor Res. Wires
    Rotor: #D448X AcDelco Professional Dist. Rotor
    Cap:#D336X AcDelco Professional Dist. Cap
    After having my 79 Avanti II professionally tuned up using the above parts I encountered radio static issues that did not change with the RPMs.
    They then found interference coming form the cover over the distributor...when a hand is placed between the distributor and the firewall the interference goes away...they found the RFI Compressor to be faulty and replaced it with a #50-7502 Radio Frequency Interference Capacitator....the also then replaced the rotor with a #D157HD and the cap with a #C197HD. All to no avail....still static! Any ideas out there.....?
    Lou Van Anne
    62 Champ
    64 R2 GT Hawk
    79 Avanti II

  2. #2
    President Member
    Join Date
    Apr 2005
    Location
    SoCal
    Posts
    4,474
    What are..."professional"...spark plugs, distributor rotor and cap ?
    And why didn't you buy..."professional" spark plug wires ?

    Mike

  3. #3
    President Member Lou Van Anne's Avatar
    Join Date
    Jun 2009
    Location
    Stockton CA
    Posts
    1,840
    You got me!....that was the description on the work order from the repair shop....that's why I hoping someone smarter than me can shed some light on the issue.....
    Quote Originally Posted by Mike Van Veghten View Post
    What are..."professional"...spark plugs, distributor rotor and cap ?
    And why didn't you buy..."professional" spark plug wires ?

    Mike
    Lou Van Anne
    62 Champ
    64 R2 GT Hawk
    79 Avanti II

  4. #4
    President Member
    Join Date
    Apr 2005
    Location
    SoCal
    Posts
    4,474
    Sounds like a ploy to get more green from your wallet, than by using plain ol, everyday spark plugs, rather than "Professional" spark plugs.

    Mike

  5. #5
    President Member Lou Van Anne's Avatar
    Join Date
    Jun 2009
    Location
    Stockton CA
    Posts
    1,840
    Make it sound better...charge 'em more money!
    Quote Originally Posted by Mike Van Veghten View Post
    Sounds like a ploy to get more green from your wallet, than by using plain ol, everyday spark plugs, rather than "Professional" spark plugs.

    Mike
    Lou Van Anne
    62 Champ
    64 R2 GT Hawk
    79 Avanti II

  6. #6
    President Member (S)'s Avatar
    Join Date
    Aug 2010
    Location
    Ferndale, Washington
    Posts
    1,885
    I'm thinking the old cap probably had a different plastic thickness or composition that kept the interference at bay. Get that cheap looking plastic wire covering from any GM car at a bone yard and slip it over the spark plug wires... Or try using the old cap.

  7. #7
    President Member Gunslinger's Avatar
    Join Date
    Aug 2008
    Location
    Frederick, Maryland, USA.
    Posts
    4,128
    The "Professional" line may use copper contacts rather than aluminum.
    Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, cocky and in general a malcontent.

  8. #8
    President Member
    Join Date
    Apr 2009
    Location
    Hawthorne, California, USA.
    Posts
    1,874
    The Professional line of AC parts is aimed at shops that are looking for decent parts that will work. They are not premium parts like the ones sold by Napa Echlin or Standard Blue Streak. The caps have aluminum contacts and not copper or brass like the premium parts. Bud

  9. #9
    President Member Lou Van Anne's Avatar
    Join Date
    Jun 2009
    Location
    Stockton CA
    Posts
    1,840
    I have verified that the the plugs and wires are indeed correct....
    Lou Van Anne
    62 Champ
    64 R2 GT Hawk
    79 Avanti II

  10. #10
    President Member SScopelli's Avatar
    Join Date
    Jun 2010
    Posts
    1,428
    Quote Originally Posted by Lou Van Anne View Post
    Plugs: #R45TS AcDelco Professional Spark Plugs
    Wires: #608D Tailor Res. Wires
    Rotor: #D448X AcDelco Professional Dist. Rotor
    Cap:#D336X AcDelco Professional Dist. Cap
    After having my 79 Avanti II professionally tuned up using the above parts I encountered radio static issues that did not change with the RPMs.
    They then found interference coming form the cover over the distributor...when a hand is placed between the distributor and the firewall the interference goes away...they found the RFI Compressor to be faulty and replaced it with a #50-7502 Radio Frequency Interference Capacitor....the also then replaced the rotor with a #D157HD and the cap with a #C197HD. All to no avail....still static! Any ideas out there.....?
    So the static in your radio does not change with RPM?

    This would lead me to think it is not your distributor. If the condenser in your distributor is bad, it would affect the spark operation, and "generally" radio noise is from the charging system.

    Being all fiberglass, every positive connection has a ground connection. You may need to check the grounding to the radio and maybe the ground's on the charging system.

    The hand is not a "Radio" noise shield. That sounds like a David Copperfield act. If you have the stainless covers over the distributor, it will be a way better Faraday cage against static than a human hand.
    (Maybe your mechanic was "Wolverine" with "Adamantium" in him.. I could be wrong.)

    I also searched the parts on Amazon. The D336X shows up but not the military area 51 shielded one C197HD does not.
    2018-11-12 16_21_23-Amazon.com_ ACDelco D336X Professional Ignition Distributor Cap_ Automotive.jpg2018-11-12 16_22_10-Amazon.com_ ACDelco C197HD_ Automotive.jpg

    https://www.amazon.com/ACDelco-D336X.../dp/B00294BJ28
    https://www.amazon.com/s/ref=nb_sb_n...ributor+C197HD

  11. #11
    President Member Lou Van Anne's Avatar
    Join Date
    Jun 2009
    Location
    Stockton CA
    Posts
    1,840
    Seriously, placing your hand there will solve the problem.....all the shields are in place.
    Quote Originally Posted by SScopelli View Post
    So the static in your radio does not change with RPM?

    This would lead me to think it is not your distributor. If the condenser in your distributor is bad, it would affect the spark operation, and "generally" radio noise is from the charging system.

    Being all fiberglass, every positive connection has a ground connection. You may need to check the grounding to the radio and maybe the ground's on the charging system.

    The hand is not a "Radio" noise shield. That sounds like a David Copperfield act. If you have the stainless covers over the distributor, it will be a way better Faraday cage against static than a human hand.
    (Maybe your mechanic was "Wolverine" with "Adamantium" in him.. I could be wrong.)

    I also searched the parts on Amazon. The D336X shows up but not the military area 51 shielded one C197HD does not.
    2018-11-12 16_21_23-Amazon.com_ ACDelco D336X Professional Ignition Distributor Cap_ Automotive.jpg2018-11-12 16_22_10-Amazon.com_ ACDelco C197HD_ Automotive.jpg

    https://www.amazon.com/ACDelco-D336X.../dp/B00294BJ28
    https://www.amazon.com/s/ref=nb_sb_n...ributor+C197HD
    Lou Van Anne
    62 Champ
    64 R2 GT Hawk
    79 Avanti II

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •