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Chevy Blazer Starting and Stalling Problems

326 messages,  Last post on Nov 27, 2009 at 10:50 AM

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#31 of 326 91 Honda Prelude by ednedy07 Aug 23, 2006 (9:13 pm)
HOnda prelude cranks but wont start. Havent been driven for quite some time. Left parked in the summer heat.Worked for a while Drove for two days and shut off while driving.. Advice would be appreciated. Replies to this message: repairdog (Aug 25, 2006 4:26 am)
#32 of 326 Re: Stalling help [samm00] by repairdog Aug 25, 2006 (4:23 am)
Replying to: samm00 (Aug 22, 2006 6:44 am) If fuel pressure was 60psi key on engine off and then 53psi up running its OK. Possible crankshaft position sensor failing or back connection - under front of engine there is a plug in connector (under harmonic balancer /water pump area - you'll see if from underneath. They are magnetic and tell the computer when to fire the plugs - when they fully die no spark and no SES light so a pain - about $60 part held in by an 8mm bolt - easy to do. Cheap one to do and rules that out. Check coil wire also with ohm meter and make sure its OK and also no arcing to metal anywhere. Then the coil itslf should be tested if this continues.
#33 of 326 Re: 91 Honda Prelude [ednedy07] by repairdog Aug 25, 2006 (4:26 am)
Replying to: ednedy07 (Aug 23, 2006 9:13 pm) For your blazer model honda (ha ha): If you have spark then check the cold start injector with an ohm meter - if they are out of spec that baby will never fire up cold (additional one just for cold starts). Look resistance value up - no honda book here.
#34 of 326 96 S10 Blazer dying fast !!!! by brian57 Sep 11, 2006 (5:46 pm)
Got a 96 S10 Blazer 4.3 CPI. When stepping on the gas more than just a little bit the engine bogs and will die out and often pops threw the intake when it's doing this. It does this in park or under load. I bought a fuel pressure guage and at idle it's around 50. If I bring it up to a very fast idle it climbs to 55-60 PSI. Theres no engine light and no stored codes but the problem pursists. I can nurse it to highway speeds but at any steady speed it's surging. Filters been replaced but the old one was only a few months old. Also, it starts and idles perfectly. Truck has 176,000 miles on the original spark plugs. I wanted to pull the plugs but I can't even get my hand into where they are.... I'd love to meet the idiot that designed this thing...... Anyone have a cure to this sick truck ???? I can't afford dealer service rates ($100+) I also can't afford to throw parts at it until I hit the bad part......   Thanks Brian Replies to this message: repairdog (Sep 12, 2006 1:42 am) niteman18091 (Sep 12, 2006 4:02 am) 00blazer (Sep 13, 2006 1:15 pm) preludeboy1 (Nov 13, 2006 10:43 am) kootzusa (Dec 16, 2006 6:20 pm)
#35 of 326 Re: 96 S10 Blazer dying fast !!!! [brian57] by repairdog Sep 12, 2006 (1:42 am)
Replying to: brian57 (Sep 11, 2006 5:46 pm) 176k and you are complaining - that made me laugh! First things first is maintenance schedule and until that is up to date even the shop will insist on a few parts to eliminate reasons. 1. Plugs, cap and rotor, plug wires, PCV (100k max miles) - most common reason for misfires, crossfires, bad running. 2. Air and fuel filters (30k normal by conditions)   After those there is the MAF sensor to spray clean, EGR possible carboned up, etc but do the above first. Plugs are easy to do thru the wheel well openings and only #3 has the steering shaft in the way and is a pain. Plug wires take awhile to snake around and don't pull hard on them and use dielectric grease in all ends and on drivers side watch order as its in cap 3-1-5 order (pass side is 2-4-6) and cap is marked - do not buy the cheapo stuff - if will fail - has on me and drives you crazy later. Cap has 2 torx screws holding on and you have to be careful and don't drop the screws in the dist! Rotor same thing. Hope that helps and good luck - 176k is great. How is the Coolant doing - 3 years should be changed and 4.3s are known to have leaking lower intake gaskets by 100k normally so watch the level - new thermostat and Stant cap with the flush change is recommended to keep it going - another forgotten thing till it has problems. Replies to this message: niteman18091 (Sep 12, 2006 4:02 am)
#36 of 326 Re: 96 S10 Blazer dying fast !!!! [repairdog] by niteman18091 Sep 12, 2006 (4:02 am)
Replying to: repairdog (Sep 12, 2006 1:42 am) I have the same vehicle and had exactly the same problem. After changing damn near every filter, sensor and believe me I wish I didn't, here it was the fuel pump. Even though it gave good pressure at idle and when you reved the motor in park, when it came to any movement it failed.    SO BEFORE YOU SPEND NEEDLESS TIME AND MONEY, CHANGE THE PUMP. Gaurenteed to work!!! This isn't to say new plugs and wires won't help, but trust me on this, it's the fuel pump!
#37 of 326 Re: 96 S10 Blazer dying fast !!!! [brian57] by 00blazer Sep 13, 2006 (1:15 pm)
Replying to: brian57 (Sep 11, 2006 5:46 pm) My guess is definately the plugs, wires and cap/rotor assembly. If you pull the front wheels off you should have no problem reaching the plugs except the #3. But it you jack up the engine a little with the floor jack it lifts it just enough to be able to get it over the stering column. Good luck.
#38 of 326 Re: 96 S10 Blazer dying fast !!!! [brian57] by preludeboy1 Nov 13, 2006 (10:43 am)
Replying to: brian57 (Sep 11, 2006 5:46 pm) I would get a voltmeter or better still a scope on the O2 signal output. If it's an old/original sensor and not been replaced for 100K + miles then it will definitely be slow and likely causing havock with your computer trying to keep the emissions tight. I had an heated oxygen sensor go on me and just before the heater finally gave up the ghost it would bog down when accelerating. The ECU finally worked out the sensor was out of spec and pulled it open loop and the engine was driveable again. A new 02 sensor fixed the problem and cleared the "check Wallet Light". On a scope you should see a clean sine wave type waveform, going 800mv or more peak and 150mv or lower in the trough. The rise time should be 100msec or better. Without a scope, as a test you could disconnect your 02 sensor and see if the engine runs better in the situations you encounter the problem most. This might cause a little hunting at idle but the engine should run fine with the sensor out and effectively forcing an open loop feedback for the ECU. I'm guessing your ECU isn't quite seeing your O2 sensor so keeps in closed loop but it's just too slow. So in sudden changes of load or acceleration it's still reading the signal but it's just to slow and inaccurate to react, so it's throwing the mixture way too rich and then lean. Good luck!
#39 of 326 Re: 96 S10 Blazer dying fast !!!! [brian57] by kootzusa Dec 16, 2006 (6:20 pm)
Replying to: brian57 (Sep 11, 2006 5:46 pm) Hey Brian , I have the same problem you had .My 95 Blazer 4.3 W vin will start fine ,idles ok . When I try to drive it sputters and doesnt go over 2000rpm. Mine has 150k miles on it, the fuel pump is 4 months old ,the wires and plugs were done about 2 years ago.how did you fix yours?

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