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Chevy S10 - GMC S15 and Sonoma Engine and Underhood Issues

317 messages,  Last post on Sep 18, 2008 at 12:38 PM

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What is this discussion about? GMC S-15, GMC Sonoma, Chevrolet S-10, Truck

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#308 of 317 Re: Low RPM engine vibration [bajaracer] by paulbaker Aug 22, 2008 (2:05 am)
Replying to: bajaracer (Jun 19, 2008 2:41 pm) Assuming it is tuned up I would pull the EGR valve and clean the carbon deposits or simply replace also check the rubber hose connections for cracks Especialy the ones going to the egr vaccuum.
#309 of 317 94 s-10 rich exhaust problem by flytesweep Aug 20, 2008 (8:52 pm)
Hi, I have a 94 s-10 4.3 vortec 6cyl. engine. The exhaust is very very noxious. When i start the engine it actually isn't too bad. As it warms up the exhaust gets very rich as if there is alot of unburnt fuel. White smoke comes out of the exhaust . The truck has been sitting awhile and the gas smelt like varnish at first. The tank sensor is not working but i have gone through the bad gas and have burnt about 2 gallons of fresh fuel.   How can i resolve this problem. Replies to this message: gonogo (Aug 23, 2008 7:18 am) mickeymouse2 (Aug 23, 2008 8:23 am)
#310 of 317 Re: 94 s-10 rich exhaust problem [flytesweep] by gonogo Aug 23, 2008 (7:18 am)
Replying to: flytesweep (Aug 20, 2008 8:52 pm) Well I have read about fuel leakage with the 4.3 CPI system. If you do some googling on the system I think you will get loads of information. I have a 2.2 my self so can't help much.
#311 of 317 Re: 94 s-10 rich exhaust problem [flytesweep] by mickeymouse2 Aug 23, 2008 (8:23 am)
Replying to: flytesweep (Aug 20, 2008 8:52 pm) Since your truck has been sitting for a long time. Hook up a fuel pressure guage and turn the key on, engine off. Look for the pressure bleeding off after the initial prime. If it does, you probably have a leaky fuel injecter. When you first turn your key on, the pressure should go up to about 55 psi to 60 psi and hold there. If you are watching the fuel pressure slowly drop off and bleed down below 55 psi within about the first minut, yup. Leaky injector. Pressure regulators rarely fail on your truck. Good luck!
#312 of 317 2000 S10 Noise by hopkins7 Aug 25, 2008 (7:49 pm)
2000 S10 4.3, 6 cy, auto, 145K. Running great. Problem is clunking/banging noise in right side of cab/wheel well area. Sounds like solid plastic housing banging against another heavy plastic housing. Glove box tight, new shocks, wheel lugs properly tightened, plastic wheel well housing tight, everything tight under front end. Doesn't sound like metal to metal sound. The banging/noise happens each time right front wheel hits a bump/rough spot in road. Mechanic has driven truck using electronic device to pick up noise in vehicles to no avail. The left side is not affected by the noise. Noise actually sounds like it's coming from under the right side of the dash. Haven't had the dash apart-yet.   Any suggestions? Replies to this message: mickeymouse2 (Aug 26, 2008 8:20 am) hopkins7 (Aug 26, 2008 6:32 pm) 2002sonoma (Aug 26, 2008 7:14 pm)
#313 of 317 Re: 2000 S10 Noise [hopkins7] by mickeymouse2 Aug 26, 2008 (8:20 am)
Replying to: hopkins7 (Aug 25, 2008 7:49 pm) Heater core might be bouncing arround a little. Try wiggling the outlets under the hood on the fire wall side, and see if there is some movement. Also check the blower fan motor, see if the mounting bolts came loose, or if the the plastic fan itself is wobbling on the end of the motor. You got a tuff one, good luck. Replies to this message: hopkins7 (Aug 26, 2008 6:32 pm)
#314 of 317 Re: 2000 S10 Noise [mickeymouse2] by hopkins7 Aug 26, 2008 (6:32 pm)
Replying to: mickeymouse2 (Aug 26, 2008 8:20 am) Thanks, I'll give those a try.
#315 of 317 Re: 2000 S10 Noise [hopkins7] by 2002sonoma Aug 26, 2008 (7:14 pm)
Replying to: hopkins7 (Aug 25, 2008 7:49 pm) mudflaps / splash guards perhaps ?
#316 of 317 84 S-10 2.8 loose vacuum line can't find where to hook to. by jthill24 Sep 12, 2008 (9:05 pm)
Hello All:   I just picked up an 84 S-10 Pickup with a 2.8 v6, using the XBX vacuum diagram. The problem I’m having is finding where the Vacuum hose from the vacuum ball and Intake manifold plugs into. None of the dealers has any manuals left for those years. The XBX diagram doesn’t show the Vacuum ball or the vacuum line I need to hook up. All the other lines are in their spots.   If I can put a picture up I will to show you what I’m talking about.    If any of you have one like mine maybe you can look on yours and see where that line hooks to.   Thanks, JaY Replies to this message: jthill24 (Sep 18, 2008 12:38 pm)
#317 of 317 Re: 84 S-10 2.8 loose vacuum line can't find where to hook to. [jthill24] by jthill24 Sep 18, 2008 (12:38 pm)
Replying to: jthill24 (Sep 12, 2008 9:05 pm) Anybody ???????? I thought it went to the Vacuum mod on the transmission but I have the 700-R4 which doesn't have one.   PLEASE, HELP.........................

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