Last post on Aug 14, 2013 at 9:55 PM
You are in the Chevrolet S-10 & GMC S15 Sonoma
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Chevrolet S-10, GMC S-15, GMC Sonoma, Engine, Truck
#37 of 319 not starting
Nov 05, 2007 (2:36 pm)
so i changed the spark plugs to what my 2 haynes books say, also with what i had found online. and from 5 different sources, the firing orders are all the same for my '85 GMC S15 Sierra Classic. i had changed spark plugs, wires, distributor cap, and rotor. and had put the new wires on in the firing order that i was repeatedly told was the right way. but now it just doesn't want to fire.
i had sprayed some carb cleaner into the carb to clean it out while i changed oil, oil filter, air filter, rotated the tires, etc. but i think i had either sprayed too much into the barrels to give it that rough turn over sound followed by backfire, or i now have it in the wrong firing order.
i had taken the other cap off to change it out, but it never occurred to me to note which wires were where.
since ran like a dream before. now i need help.
#38 of 319 not starting (2)
Nov 05, 2007 (3:10 pm)
i have an '85 GMC S15 Sierra Classic 2.8L V6 (Carb)
*Note: this is the last place i went to find the firing order for my truck.
link title - Engine Firing Orders: 1985
are these right?
#39 of 319 Re: not starting (2) [tolouse]
Nov 06, 2007 (8:47 am)
That's the order. Next time replace the wires one at a time.
You need to get #1 cylinder on compression stroke on timing mark, then see if the rotor points to the #1 plug wire. Some one may have removed the dist and timed it out of normal sequence.
#40 of 319 Re: not starting (2) [gonogo]
Nov 06, 2007 (4:37 pm)
thanks. i was terribly tired from work 2 double shifts on daylight savings time before i started wahooing cables the other day.
anyways, just went back out, detached the cables from the distributor, took the dist back off to verify the #1 (underneath the cap, there is 1 number that tells you which is for the #1). i also made sure the rotor was hitting the cap also. then i plugged each one in numerical sequence to the cap, to make sure that i had it right.
after i had it all screwed down, plugged up (in my frustration yesterday, i had switched #2 and #6 on dist without verifying), i gave it a try.
there was a spray that came from my carb. it smelt like the cleaner i had sprayed in there. i think i have flooded the carb with cleaner.
after a few more tries and sprays, i decided to give it a rest for a few before i go back out there. because it sounds like it wants to turn, but hesitant because of the cleaner.
i'll be back with an update on how it goes.
#41 of 319 Re: not starting (2) [gonogo]
Nov 07, 2007 (3:32 pm)
i found the problem.
the person who worked on my timing chain in 2001 had ended up turning it out 180. so where 3 would be (on the dist) is where #6 is. and where 4 would be is where #1 is.
i don't know quiet that much about the timing chain to do it myself, but it runs. and seems to be working in that order. it has been in that order for the last 6 years.
when i have time and a place to put it, i will definitely look at changing it back to factory specs.
but, that is a project for a different time.
either way, thanks for the help. i think i have learned alot about spark plug wires and the distributor within the last couple of days.
#42 of 319 Re: not starting (2) [tolouse]
Nov 08, 2007 (8:53 am)
Glad you got it going.
#43 of 319 Re: 97 Sonoma V6 Won't Start in the morining (sometimes) [nitrate]
Nov 10, 2007 (6:49 pm)
I have a 94 Sonoma 4.3 Vortec V6 with the same problem.....have u solved urs yet?
#44 of 319 Re: 97 Sonoma V6 Won't Start in the morining (sometimes) [sbs57]
Nov 11, 2007 (12:51 pm)
mine is running like a dream now. the first day i drove it to work, i had smoke coming from under the truck, so i checked the plugs during my lunch. they all seemed fine, just covered in soot.
after i had them all back in, i decided to crank it and give it a try. it fired up like a dream. and i drove it home with no flaws that afternoon. it was the greatest ride i had in a long time.
i figured it was burning up the gunk after all the misfires and unsuccessful tries.
but the first time i had hooked up the wires, i got alot of backfires and just wouldn't start. that was when i figured they must be turned turned out. mine was turned 180 degrees.
#45 of 319 Re: not starting (2) [tolouse]
Nov 12, 2007 (11:01 pm)
You can always return the distributor to the original position as factory, but it might have been done the way it is now to make more space for it to move for final timing.
You just line it up on number one on compression and pull out distributor and put it where you want it.
It has to engage into the oil pump drive as well and cam gear at the same time and thats the tricky part to get it lined up where you want it to face.
Have a tool on the crank to move it a little to make it settle in.
Glad you figured it out..
#46 of 319 99 sonoma
Nov 20, 2007 (2:47 pm)
i have had problems lately and it only happens on about every 15 starts.. i turn the key and it makes a sucking noise and tries to start and then i stop and try it again and it starts fine. i just cleaned my plugs and got a new air filter and checked for any loose wires. any suggestions??