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Pickups Chevrolet S-10 & GMC S15 Sonoma Chevy S10 - GMC S15 and Sonoma Starting problems
195 messages, Last post on Nov 20, 2009 at 8:21 AM
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I Have a 1999 Chevy S10 4.3 Vortec. I am having a problem starting the truck when it sits for a while. It will crank over for several minutes. Once it starts and i run it, it will start all day with no issues. It only happens when it sits over night. The fuel pump turns on and has been replaced. The plugs, wires, and cap all have been done. Tried a new battery. Had hours of diagnostics done and have gotten nowhere. I just dont get why it is only when it sits. Its driving me crazy. Any Ideas? |
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Replying to: nitrate (Oct 10, 2007 4:32 pm) |
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| i have a 1988 Chevy s10 2.8 2wd i cant get it to fire over i had done a transmission in it about 3weeks before she stopped i did cap rotor wires plugs and fuel pump and the egr but before i did that i was getting fire out the carburetor got a timing light she was dead on the money compression test all were at about 146-150 at this point i don't no what more it can be after changing everything I'm not getting fire out the carburetor its just not kicking over now the fuel is going down into the carburetor i did a o2 sensor to night and still have nothing not sure what more it can be | |
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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. |
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i have an '85 GMC S15 Sierra Classic 2.8L V6 (Carb) ---edit--- *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? |
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Replying to: tolouse (Nov 05, 2007 3:10 pm) 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. |
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Replying to: gonogo (Nov 06, 2007 8:47 am) 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. |
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Replying to: gonogo (Nov 06, 2007 8:47 am) 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.
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Replying to: tolouse (Nov 07, 2007 3:32 pm) |
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Replying to: nitrate (Oct 10, 2007 4:32 pm)
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