Jump to content

1987 Silverado 350 Tbi Timing

jblakeney

Recommended Posts

jblakeney Senior Enthusiast

jblakeney

Posted
Posted

I do not have an emissions label on my truck. I need to set the timing as I just rebuilt the engine. I looking in my Tune Up guide at work but the book stopped in 84.... Clearly missing the boat on EFI and computer controls...

 

I know I need to disconnect the EST wire... I think I found it when I was wire looming all the engine compartment under the master cylinder... My big question is what to set the timing on. 0 degrees? 2? 4? 8? 16? 32? 64? 128? 256? 512? 1024? 2048? 4096? (the 31337 group know what the powers of 2 come from).....

 

Anyways guys if anybody knows what to set it at let me know.... I'd like to get my truck buttoned all together this weekend.

 

Thanks,

Jbo

kmborland Enthusiast

kmborland

Posted
Posted
mine is a 4* or 6* pulls strong and hard.

i am interested in this, did you notice better mpg, better power, have to run higher octane fuel, bump fuel pressure, did power come on sooner? thanks for any help, i need to check timing too and was also going to post a thread asking basically same question.

GMstrong Enthusiast

GMstrong

Posted
Posted

I run 93 oct,For what i got in the motor and it not being "performance oriented" motor she gets up!had it up 80 in 3rd soon as it hitted od i had to stop for traffic.As for adjusting timing go for it.But i wouldn't go any thing above 8* advanced or you might have some spark knock.Try it at 4* then 6* see which feels better.

jblakeney Senior Enthusiast

jblakeney

Posted
  • Author
Posted

I set the timing today. I found the EST connector under the brake booster taped to the bulk head going into the interior of the car.

 

This is the type of connector (Weather Pack)

205_WPT-1-203.jpg

 

This is the half that is taped to the harness.

205_WPS-1-203.jpg

 

I unplugged the connector and set the timing to 0 degrees. Tightened the distributor back down. And rechecked and plugged the EST back up. It stayed at 0 for just a second after I plugged the EST back up then moved up just a bit, after a few seconds.

 

Maybe I should snap some pictures of the EST wire location. It is a Brown with Black stripe wire. NOT THE Brown with White stripe.... Brown with White stripe kills the injectors..... Ask me how I learned that, but most of you figured out how I learned that.

 

Jbo

ChevyTech77 Senior Enthusiast

ChevyTech77

Posted
Posted

Brown w/black stripe with that connector is correct. Engine off, disconnect that connection, start engine, set timing to 0°, engine off, reconnect timing connection, done.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • 2017Z
      2020 Trailboss 6.2 replacement

      By 2017Z · Posted

      Looking for advice from this group. Took my flawless 2020 6.2 TB to an unnamed shop for routine rear brakes and oil change. Tech forgot to put oil back in after the full service and needles to say, destroyed my engine.  It’s all on their shop video so they are responsible.   I had my Chevy dealer do the analysis and they confirmed its compromised and said engine replacement. The manager said they only get GM reman engines from GM with full 3 yr warranty and the one they would put in is not same as what’s they are swapping out on 21-25 for recall.    I am looking for advice why that would be a different engine because obviously I had the good 6.2 year and replacing it has my concerns with that recall for 21-15   Also what’s the pros and cons of accepting the engine swap vs telling the shop that bricked the truck to pay up so I buy a new truck. I’m concerned about stigma resale eventually if I just decide to get rid of it after the swap or other issues showing up after the swap out.  
    • GN2018
      AFM Disabler Question

      By GN2018 · Posted

      Just looked up my records.  I've never gone over 5000 miles between oil changes.  At 46K miles, I have 10 oil changes.  I hope that will help.  I also installed the disabler last year.  I've still had a few times when it didn't seem to engage (which I can tell because the start stop feature kicks in), but for the most part, I think it's working.  For some reason, GM did not include the number of cylinders running in the information screen like I had on other models.  In my Cadillac, it shows me when it's running on 4 cylinders on the fuel milage screen.  I can't find that on my '21 Denali.
    • davester
      Wiring Help, Please

      By davester · Posted

      you might read through the info on gmupfitter.com for your truck, to find a good power source.
    • Grumpy Bear
      AFM Disabler Question

      By Grumpy Bear · Posted

      Melling I believe is/was the OEM on the lifters who explored this problem some years ago. The white paper they generated on the topic indicated two items of note when I read it. 1.) They only fail on the switch. Prevent the switch, prevent the failure. 2.) The majority fail due to deposits messing up the timing of that switch. Anyway that's what I got from it.    Mine have always been active, 195K+ now, and my oil maintenance is surgically clean.    Of course this assumes good parts. That is no heat treat issue or machining flaws. I get comfortable that these issues are in the rearview mirror by about 30K. IMHO naturally. 
    • Chuck FB
      2 speed transfer case optional now?

      By Chuck FB · Posted

      Yes, the key seems to be with the half tons that if it has the Z71, then it definitely has the two speed. What got me was that the two speed AND the lower geared towing package option could not be chosen together the last few years unless it was mated up to the 6.2. Want the 3.0 duramax and 3.73 tow gears ... nope, can't get the two speed transfer case ( neighbor son realized that after he had bought his used 3.0 half ton .. where the frick is the low range ? ! ).    I am still unsure which truck series, the half ton or the HD truck that the original poster is referring to for sure other than yes his question is in the HD section of this forum but that doesn't guarantee the question got asked in the right section.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...