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73-87 Chevy _ GMC Trucks => Projects Posts (NOT VEHICLES) => Topic started by: Joe25da on June 05, 2015, 05:14:27 pm

Title: Tune up this weekend
Post by: Joe25da on June 05, 2015, 05:14:27 pm

Got my parts in from rock today all ac delco pro. Wires, cap, rotor, coil. Gonna get the plugs from napa. Couple questions. The truck is an 84 3500. 350 m code. What are the best plugs to get? I know many recommend the delcos but I can't remember what part no.

Title: Re: Tune up this weekend
Post by: Irish_Alley on June 05, 2015, 05:46:26 pm

is your engine stock?

Title: Re: Tune up this weekend
Post by: Irish_Alley on June 05, 2015, 05:48:39 pm

R45TS is the ac number i use

Title: Re: Tune up this weekend
Post by: Joe25da on June 05, 2015, 09:35:37 pm

Stock 350 4bbl. Hoping the ign parts improve performance. Once in a while, if I'm in 3rd in low rpm it will feel like it's starving for fuel, but if I downshift and rev it's fine. I put a new fuel filter on a while back too. Here's the truck
(http://i729.photobucket.com/albums/ww294/joe25da/Mobile%20Uploads/image_zpszqpfgerf.jpg) (http://s729.photobucket.com/user/joe25da/media/Mobile%20Uploads/image_zpszqpfgerf.jpg.html)

Title: Re: Tune up this weekend
Post by: Joe25da on June 08, 2015, 08:44:40 pm

Started yesterday, did the cap, coil, rotor 2 plugs and wires. Finished the other 6 today. I haven't done one of thes in a long time, my toyotas have individual coils for each cylinder. All came back quick. So I fired it up, ran great but i thought wow that exhaust leak got worse? Then I realized the sound was the rotor hitting the walls of the distributor cap, one of the retaining screws came off the cap and it was crooked. Fixed that and no more noise. Test drive tomm

Title: Re: Tune up this weekend
Post by: Irish_Alley on June 09, 2015, 01:26:07 pm

lol done that before

Title: Re: Tune up this weekend
Post by: outlaw70nova on June 17, 2015, 12:26:44 pm

Very cool truck!

Title: Re: Tune up this weekend
Post by: enaberif on June 17, 2015, 04:07:27 pm

Make sure you gap the plugs correctly too that can make a big difference.

Title: Re: Tune up this weekend
Post by: 1979mmx350 on August 11, 2015, 01:58:23 am

From my research, .35 to .45 seems to be the correct gap. I just angled mine out a bit with a screwdriver tho.

Title: Re: Tune up this weekend
Post by: enaberif on August 11, 2015, 08:14:15 am

Quote from: 1979mmx350 on August 11, 2015, 01:58:23 am

From my research, .35 to .45 seems to be the correct gap. I just angled mine out a bit with a screwdriver tho.

.030 is for a points system and .045 is for a HEI system and you should really be using a gap tool as too little gap or too wide of a gap can cause issues.

Title: Re: Tune up this weekend
Post by: 1979mmx350 on August 11, 2015, 08:28:02 pm

Thanks for the correction. I might need to go back in and do the job right then. Seems to be running fine, but I gapped em to what I thought would be about a third of a cm.