You are here: Forums Pickups Chevrolet S-10 & GMC S15 Sonoma Chevy S10 - GMC S15 and Sonoma Oil Questions

Chevy S10 - GMC S15 and Sonoma Oil Questions

33 messages,  Last post on Oct 14, 2009 at 9:15 AM

You are in the Chevrolet S-10 & GMC S15 Sonoma Forum. Your Host is kcram

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

Messages Page 4 of 4 1 2 3 4 Prev Next Last

Go To Msg # Search This Discussion

#25 of 33 1995 sonoma by fstuter Jul 24, 2008 (10:09 pm)
I have a 1995 sonoma 5 speed manual shift 4.3 with 94,000 miles on it.My problem is that when it is cold it runs just fine but as soon as it warms up the oil pressure drops,but when i shift it goes back up untill i am in gear and driving it drops back down.The rpms are up the oil pressure goes up but in idle it drops down.This just started today so i don't want to keep guessing does anyone have any solution?? Replies to this message: hoodlatch (Jul 27, 2008 3:12 pm) bsedmundson (Aug 01, 2008 10:16 am) gonogo (Sep 14, 2009 8:33 am)
#26 of 33 Re: 1995 sonoma [fstuter] by hoodlatch Jul 27, 2008 (3:12 pm)
Replying to: fstuter (Jul 24, 2008 10:09 pm) It sounds like the oil pan has to come off to find the culprit. My neighbor had a similar problem with is 2000 4.3. Once we got the oil pan off we found it spun a rod bearing. Sometimes if routine maintenance isn't done the oil pump pick up screen gets clogged up. Sometimes the oil pump gets week. 94K miles is pretty low for a 1995. I would think the bearings are in pretty good shape if the engine hasn't been dogged out. Is it possible your oil-sending unit isn't lying to you? I just change out one on my kids Corsica. It had an aneurysm and was leaking oil very drastic. They’re inexpensive and not too hard to change out. I used a deep wall 15/16th. I would prefer to do that first before dropping the oil pan. In my neighbors case it was a 4.3 in a full size van and it wasn't any problem getting the pan off. On a Sonoma you'll probably have to loosen a few things and jack the engine up to get the clearance. Good luck.
#27 of 33 Re: 1995 sonoma [fstuter] by bsedmundson Aug 01, 2008 (10:16 am)
Replying to: fstuter (Jul 24, 2008 10:09 pm) My 95 blazer oil press drops at idle 20-25 psi then at normal rpm 40-45 psi has over 200,000. try and install a gauge to see real engine press. other than that it all guess work Replies to this message: gonogo (Sep 14, 2009 8:33 am)
#28 of 33 oil pressure high by enzo14 Sep 12, 2009 (3:02 pm)
i have a 00 sonoma 2.2 and when i start it the oil pressure shoots up almost to 80. theres 123k miles on it and when i come to a stop it comes down to about 40 but then goes back up when accelerating. i drove it today into town and for the first time it started shutting off a couple times at stop. the temp is normal. also when it shifts into 2nd when its cold it has a pretty noticeable kick.??? i checked the oil and its fine. also checked the tranny and is a little low.
#30 of 33 Re: 1995 sonoma [bsedmundson] by gonogo Sep 14, 2009 (8:33 am)
Replying to: bsedmundson (Aug 01, 2008 10:16 am) That sounds about right for a 4.3, the 4 cyl runs higher.
#31 of 33 1995 S10 2.2L by dfmartin Sep 27, 2009 (6:08 pm)
I have a 95 S10 2wd. It has a 2.2L 4 cylinder, 5 speed manual tranny. 141000 miles. This truck has been great to me, up until the last six months. Chasing several different problems (most of which are now solved) I had to replace the spark plugs and spark plug wires, a leaking fuel injector, the water pump, the alternator, the battery, and the catalytic converter. I currently have two problems with the truck. When driving, at idle I lose oil pressure. It isn't dropping completely, but low enough to set off a warning light (in the red part of the gauge). When on the freeway, or at a stop but revving, the oil pressure looks fine, but as soon as I push in the clutch the pressure drops. This problem only occurs when the engine warms up. I have added oil to it and it does have a small leak somewhere that I've not identified, but it has had this leak since I've owned it. It's a very slow leak. Additionally, only when the truck has sat for a few days, it misfires until it reaches operating temperature. It only misfires in gear under a load. If you push in the clutch or slip it into neutral and rev it, it does not misfire. Does anyone have any insight? I mostly concerned with the oil pressure, but any info on the misfire would be greatly appreciated. Replies to this message: gonogo (Sep 28, 2009 7:41 am) dfmartin (Oct 14, 2009 9:15 am)
#32 of 33 Re: 1995 S10 2.2L [dfmartin] by gonogo Sep 28, 2009 (7:41 am)
Replying to: dfmartin (Sep 27, 2009 6:08 pm) For oil pressure try a new sender unit, if no help, may need an oil pump or engine overhaul. That engine works best with factory plugs, I know they are expensive.
#33 of 33 Re: 1995 S10 2.2L [dfmartin] by dfmartin Oct 14, 2009 (9:15 am)
Replying to: dfmartin (Sep 27, 2009 6:08 pm) I replaced the sending unit and my pressure is looking much better. Poor old girl has a quiet knock sometimes now. Looks like it's time to upgrade. Anyone want to buy a 95 S10 with 141K? Only $12,000.00 HAHA (kidding)

Messages Page 4 of 4 1 2 3 4 Prev Next Last

Go To Msg # Search This Discussion

You are here: Forums Pickups Chevrolet S-10 & GMC S15 Sonoma Chevy S10 - GMC S15 and Sonoma Oil Questions