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Chevy S10 - GMC S15 and Sonoma Stalling/Dying issues

113 messages,  Last post on Jul 28, 2008 at 7:54 AM

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#104 of 113 Re: 2001 S10 Increased Idle Speed 2.2 [lilgto] by vikan Jun 28, 2008 (6:02 am)
Replying to: lilgto (Jun 27, 2008 11:30 am) lilgto,   If you suspect the IAC, have you tested it yet? From what I've read, the IAC valve is something that receives data from other sensors as well. Coolant temp, AC, accessories etc. It is supposed to compensate for the load you are putting on the engine. i.e. if you turn the AC on while idling, the engine would normally slow down due to the increased load, thus making the IAC compensate for that and speed up the engine to keep is from stalling. If you disconnect the IAC while the engine is running and put a load on the engine, the engine should stall which indicates the IAC is working. If this is the case, the IAC probably isn't the problem.   Sounds like it may be an air blockage issue. Maybe a vacuum line that is restricted or pinched that is plugged into the intake? You know how an engine will speed up if the choke is on? Same principle in my opinion.   Good luck. Replies to this message: lilgto (Jul 05, 2008 6:00 am) vikan (Jul 08, 2008 4:12 am) lilgto (Jul 15, 2008 5:19 am)
#105 of 113 Re: 2001 S10 Increased Idle Speed 2.2 [vikan] by lilgto Jul 05, 2008 (6:00 am)
Replying to: vikan (Jun 28, 2008 6:02 am) vikan,   Thanks for responding, yes I have tested it and even changed it out but it has started happening again during the warm weather. I have been looking for vacum leaks for some time but so far nothing. I am thinking the problem might be in the PCM since the fast idle issue disappears whenever I shut the vehicle off and restart it. I will keep trying to figure this out since the mecnanics seemed to be puzzled. Once again, thank you for your prompt response. Replies to this message: vikan (Jul 08, 2008 4:12 am) lilgto (Jul 15, 2008 5:19 am)
#106 of 113 Re: 2001 S10 Increased Idle Speed 2.2 [lilgto] by vikan Jul 08, 2008 (4:12 am)
Replying to: lilgto (Jul 05, 2008 6:00 am) lilg,   After a quick search on google and reading from this Q & A, it sounds like there may be something shorting that leads back to the PCM. You might want to do a little reading here and maybe even post a question to these guys. I'd hate to see you spending money on guessing what might be wrong, only to have to spend more on something else. I know it gets frustrating so hang in there. Personally, I think at this point, I would attempt to find a schematic that shows you what connects to anything that has to do with idle speed. http://www.2carpros.com vikan Replies to this message: lilgto (Jul 15, 2008 5:19 am)
#107 of 113 1995 s-10 blazer, electrical issue by goxner Jul 14, 2008 (11:08 am)
i am experiencing an electrical issue with this vehicle. i am blowing fuses left and right. first it was the fuse for the guages. i unplugged the ac relay and that problem went away. not even a week later while driving home, the vehicle just dies. the fuse for the ECM Batt, blows. i replaced the fuse and restarted the vehicle with a little coaxing, it idles, but when i press the accelerator pedal, it starts to buck and sputter, then dies, blowing the fuse once again. the vehicle will move in reverse fine but when it is in drive it buck and dies. i have a mechanic chasing wires but has found nothing as far as a pinched wire or exposed wire causing the short. any help with this will greatly be appreciated.
#108 of 113 Re: 2001 S10 Increased Idle Speed 2.2 [vikan] by lilgto Jul 15, 2008 (5:19 am)
Replying to: vikan (Jul 08, 2008 4:12 am) vikan,   Again, Thank you for the information, I will check out the link you provided and see what happens. I too have thought it was a short but then I was told by a good source it could actually be the PCM going bad...
#109 of 113 when it wams up it dies by fte003 Jul 15, 2008 (9:51 am)
please someone..i need help.i have 1992 gmc sonoma 4.3 6 cyl 2wd   i have had this truck for 3 years now..she's been a real good truck.. but the other day i got off the highway and came to a stop..and it just died..took about 45 minutes for it to start back up..got it about 4 miles more and it died again..took 2 hours for it to start again..got about 3 blocks and died..had it towed home the rest of the way.i have replace fuel pump,filter,thermostat,map sensor,throttle sensor, coil i can go ut side now and she will start right up but as soon as she warms up it dies. the igition works fine ..to me something is getting hot and shuts engine down till it cools back down...please if anyone can help i would be grateful this truck is my lively hood and i need her back on the road... thank s Replies to this message: vikan (Jul 20, 2008 7:53 am)
#110 of 113 engine warms up veichle dies by fte003 Jul 16, 2008 (10:46 am)
some one out Please see if u can help, i have a 1992 gmc sonoma. my problems started with fuel pump. i replaced fuel pump, filter. truck ran good again/ about week later i came off highway and it died. took about 45 min to start again got it about 3 miles and died again. took 2 hour for it to start.. got 3 blocks and once again it died. i then had it towed home. i had code check come up for map and throttle sensor..i have replaced them also now. i have even changed thermostat.. the problem i have when truck is cold it will start right up but once it warms up it shuts down..the igition cranks real good but it wont start. i have checked the coil it works..so if someone else has this problem and got it fixed please help..this truck is my lively hood and i need it back on the road. many thanks
#111 of 113 Re: when it wams up it dies [fte003] by vikan Jul 20, 2008 (7:53 am)
Replying to: fte003 (Jul 15, 2008 9:51 am) Have you checked to make sure you have no air restriction? I'm assuming this vehicle has a throttle body. If it starts with no problem, remove the air cleaner. watch the butterfly on it to see if it closes on it's own once warmed up. Wrap the engine to see if it's operating properly. Next, I'd run it without the air cleaner (on the highway away from dusty environment) to see how it acts. If it does die, have someone crank the engine and see if your butterfly is in the closed position which would be choking it.   Another thing to check is your vacuum lines going to the intake. If the idle seems rought spray a soapy water solution around the vacuum line fittings. If the idle smoothens when water is sprayed, you have a vacuum leak.   The last possibility I can think of without spending a lot money is vapor lock. Make sure your vent lines for the fuel tank are not plugged. I believe the engine compartment holds the gas fume recycling canister (not the exact name) which has vent lines that run from the fuel tank to the canister (charcoal filled for emissions) and back to the tank again. The easy test would be to drive without your gas cap on.   Good luck.
#112 of 113 Re: 1988 S-10 Starts and Dies [sjowett] by dallasman999 Jul 22, 2008 (9:16 pm)
Replying to: sjowett (May 29, 2006 4:58 am) after it dies spray some starter fluid into intake and see if it starts, if it does you have a fuel prob, if it doesn't you have an ignition prob. If it has an electronic ignition module i would suspect that, you may do a spark test after a no start
#113 of 113 GMC 1996 Jimmy by lran Jul 28, 2008 (7:54 am)
Hi all I am starting to have a issue. My truck ( 1996 jimmy v6 vortec) has ran flawless, but all of a sudden I will be driving down the highway and it just quits. I put it into neutral and it starts up and can drive again. Sometimes for an hour or 2, and sometimes it will do it again right away. This is happening when the vehicle is warm and at highway speed. When I am in town this rarely happens, it will only happen if I just came from the highway and am just getting into town it might just die. I thought it might be a bad batch of gas, but it has happened for a month now. I thought it might be a new stereo that I got put in, but it still happens when I leave the faceplate off the stereo. I am at a loss of what to start to check what is causing this as parts for this truck are extremally high. It has had regular oil changes and has recently had a tune up.   thank you for any suggestions.

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