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Chevy Blazer Starting and Stalling Problems

216 messages,  Last post on Oct 11, 2008 at 2:48 PM

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#82 of 216 1994 chevy blazer vacuum leak? by scott7002 May 21, 2007 (8:32 am)
My truck recently started running like all cylinders weren't firing. This happened before and salvage yard said it was a vacuum hose that was cracked. Any idea what name might be of this hose? Replies to this message: repairdog (May 22, 2007 2:56 am)
#83 of 216 Re: 99 Blazer Trailblazer Idles rough and stalls [jtemple42000] by preludeboy1 May 21, 2007 (5:38 pm)
Replying to: jtemple42000 (May 13, 2007 6:27 am) I would rule out the Map sensor & I'm assuming you checked the common ignition switch and cap/rotor issues with this vehicle. If your ICU is not throwing up a code then I would strongly look at the ignition system. Specifically your ignitor could be on the way out. It can overheat and stop premutely with this age/mileage. Once it cools down it works again but it's close to death. The only other thing is the oxygen sensor which is also close to dying which is typical at 120K+ miles. When the O2 sensor gets 'slow' it's still within the computer's acceptable range so doesn't throw a code until it dies completely, but it's bad enough to choke the engine temporarily. Does it happen when the engine is warming up in the first 5 mins? You can rule this out by disconnecting the O2 sensor temporarily and seeing if the engine dies again with same scenario (it might run slightly rough but it shouldn't stall with 02 open circuit). Ideally you can hook the 02 sensor output to an oscilloscope and check it's swinging cleaning and fast between 0.2-0.8 volts if you or a shop has the equipment. The fuel pump and/or filter is the only other outside thing I can thing of.
#84 of 216 Re: 1994 chevy blazer vacuum leak? [scott7002] by repairdog May 22, 2007 (2:56 am)
Replying to: scott7002 (May 21, 2007 8:32 am) Vac lines all run off the PCV tap on the intake so follow them over to the drivers side and repair all rotted ones - 5/32" are smaller ones. Now if you smell gas then perhaps its the classic CPI and nut kit (fuel lines under the intake) that are leaking. Search that and see the post answers.
#85 of 216 Re: 97 Blazer starting problem [rkmalone1] by scottd2 Jun 05, 2007 (5:43 pm)
Replying to: rkmalone1 (May 08, 2007 5:59 am) In regard to the power seat issue, where is the fuse or relay located that you replaced? I've been trying to figure out why the power seat on my 96 jimmy isn't working & I haven't been able to locate any fuse or relay for it.
#86 of 216 Re: 97 Blazer starting problem [repairdog] by cubanswmmr Jun 09, 2007 (6:52 pm)
Replying to: repairdog (May 07, 2007 4:25 pm) hey could you tell me what the connector or wiring harness that is causing the problem is called, i am having the same problem and need to know what it is called thanks Replies to this message: repairdog (Jun 10, 2007 4:52 am) cubanswmmr (Jul 15, 2007 7:49 pm)
#87 of 216 Re: 97 Blazer starting problem [cubanswmmr] by repairdog Jun 10, 2007 (4:52 am)
Replying to: cubanswmmr (Jun 09, 2007 6:52 pm) Power seat wiring. Replies to this message: cubanswmmr (Jul 15, 2007 7:49 pm)
#88 of 216 95 S10 Blazer Cold Starting by larrysbar Jun 22, 2007 (9:11 am)
My 95 s10 Blazer is hard to start when cold it can take up to 10 try's (SHORT BURST)but so far always start's It seem's to start as the key goes off but sometime it will start first try even after sitting a week I changed wires ,plugs ,rotor,cap,fuel and air filter Cleaned injectors, rail, MAF,and EGR Tested fuel pump and coil Always starts warm 1st or 2nd try and runs great 120k miles on gets 22mpg on a 300 mile trip Help Replies to this message: repairdog (Jun 22, 2007 1:54 pm)
#89 of 216 Re: 95 S10 Blazer Cold Starting [larrysbar] by repairdog Jun 22, 2007 (1:54 pm)
Replying to: larrysbar (Jun 22, 2007 9:11 am) The older models have 2 temp sensors and the one for the PCM input for cold start is by the EGR valve so that could be it.
#90 of 216 2000 GMC Jimmy won't start by jimmy6 Jun 25, 2007 (6:39 am)
My 2000 GMC Jimmy 4WD automatic will not start on occasion. Car has 96,000 miles. Battery is new. When I try to start engine, all electrical seems to work fine - just no cranking (not even sluggish cranking). NOTE: this problem occurs intermittently! First time it happened last year, I called for a tow but by the time he arrived, the car started just fine (Tow guy checked battery/electrical anyway and said all was fine). No problems for about the next 3,000 miles, then the problem resurfaced yesterday. This time, I moved the shift lever to NEUTRAL and the car started fine. Same problem a few hours later - so I jiggled the shift lever in park and it started right away. So, I'm guessing this is NOT a PASSLOCK problem but rather something to do w/ a safety sensor relating to the shifter. Is there such a device and, if so , how can I verify this - rather than PASSLOCK - is really my problem and is there a sensor/part which I can replace?thank you. Jimmy6 Replies to this message: repairdog (Jun 27, 2007 3:13 pm)
#91 of 216 Re: 2000 GMC Jimmy won't start [jimmy6] by repairdog Jun 27, 2007 (3:13 pm)
Replying to: jimmy6 (Jun 25, 2007 6:39 am) Transmission has an adjustment on the drivers side and must be in park or N to start so get it done at the shop in about 5 minutes.

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