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Chevy Blazer Starting and Stalling Problems

324 messages,  Last post on Nov 14, 2009 at 8:20 AM

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#252 of 324 Re: 97 Blazer died while driving wont start by sandwichman Feb 24, 2009 (1:03 pm)
Replying to: 92hatchbackk (Feb 24, 2009 8:37 am) I've had a similar problem with my 1997 Blazer (Vortec V6). My problem was that some of the electrical components would work... windows, lights, radio, etc would work and would crank, but not start. But, if I flicked the key on/off enough times the gauges would all light up and I could hear the fuel pump buzz - and the Blazer would start fine. Sometimes it would work sometimes it wouldn't. Very annoying, very frustrating. My problem - the Turn Signal arm. There are a bunch of connections on the backside of the arm - if you don't pull it straight out when removing it the horn will honk, etc.... Seemed silly that they wouldn't insulate them more. So, I put some electric tape on the steering column and Dielectric Compound on the connections. Put the key in and it started fine. Turned it off and on a couple dozen times and worked every time. I haven't had the problem since. This was 4 months ago. Replies to this message: elaney1981 (Feb 24, 2009 1:19 pm) sandwichman (Feb 24, 2009 1:58 pm)
#253 of 324 Re: 97 Blazer died while driving wont start [sandwichman] by elaney1981 Feb 24, 2009 (1:19 pm)
Replying to: sandwichman (Feb 24, 2009 1:03 pm) It sounds like the ignition is bad. I would try that. Or a bad fuel pump relay. Replies to this message: sandwichman (Feb 24, 2009 1:58 pm)
#254 of 324 Re: 97 Blazer died while driving wont start [elaney1981] by sandwichman Feb 24, 2009 (1:58 pm)
Replying to: elaney1981 (Feb 24, 2009 1:19 pm) LOL - read my message! I fixed my problem.
#255 of 324 Re: 97 Blazer died while driving wont start [jlflemmons] by bedard Feb 24, 2009 (4:45 pm)
Replying to: jlflemmons (Feb 22, 2009 8:18 pm) We changed the MAP sensor, the engine came with the distributor, changed the rotor, plugs, wires. we had it checked and it was giving off 2 codes, thats when we changed the fuel pump. someone told me it could be the computer? they said it should only give off one code? Its not the ignition coil either we tried replacing that. Im going nuts. I guess we will have to get a scan tool and see if it reads anymore codes, thanks. Replies to this message: jlflemmons (Feb 25, 2009 8:22 am)
#256 of 324 Blazer like the title of the blog says wont start!! by iafffireman823 Feb 24, 2009 (5:58 pm)
Hello everyone, I'm new to this world of online help. After years of working on cars and being out of the business I am finally stumped. I have a 1999 Chevy Blazer 4.3 Vortec with 189,172 miles on it and still running strong.....well when i can get it started. In the past as of three years ago replaced the fuel pump and filter. Both are fine and working. I have a fuel pressure at switch turn of 60 psi. and a running pressure of 54 psi. Both from what I understand as in with in range. Next I do have a good battery. Here's how the problem goes. When I go to start my truck it will try to turn over and sounds as it should, it just doesnt fire as it isnt getting fuel or the battery is weak. Now when you either a) give it a little shot of ether or you b) hook jumper cables it will fire right up. I'm kind of at my ends wit with this issue. Anyone have any good ideas as to where I can look to solve this issue. And please note this starting issue is only occuring when I start the vehicle for the first time of the day. Also when the weather is warmer out above 50 degrees it seems to start right up. Thanks for the help and input! Replies to this message: jlflemmons (Feb 25, 2009 8:27 am) iafffireman823 (Feb 25, 2009 4:27 pm) jbutters (Feb 25, 2009 7:17 pm)
#257 of 324 Re: 97 Blazer died while driving wont start [bedard] by jlflemmons Feb 25, 2009 (8:22 am)
Replying to: bedard (Feb 24, 2009 4:45 pm) Oh, no, you can have several codes stored. To test out an ECM, I pulled the connector to the MAP, MAF, EGR, and TPS then checked to see if all the codes were caught, and they were. Find out all the codes that are set and see what you get.
#258 of 324 Re: Blazer like the title of the blog says wont start!! [iafffireman823] by jlflemmons Feb 25, 2009 (8:27 am)
Replying to: iafffireman823 (Feb 24, 2009 5:58 pm) Check the ground at the block, check the battery cables to be sure they aren't acid eaten up under the insulation. It sounds like you have a low voltage condition. Ether makes it fire off with less spark, and jumping bumps the current up and will help overcome the voltage drop across a weak ground or power connection.   Regarding the battery, check the voltage while cranking. I have come across a lot of new batteries lately that have problems, most of them from Autozone. Not a slam against Autozone in particular, but whoever is making their batteries is having problems. Replies to this message: iafffireman823 (Feb 25, 2009 4:27 pm)
#259 of 324 Re: Blazer like the title of the blog says wont start!! [jlflemmons] by iafffireman823 Feb 25, 2009 (4:27 pm)
Replying to: jlflemmons (Feb 25, 2009 8:27 am) thanks for the help, i will consider those issues. Also I may have forgotten to mention the fact my SES light is on and throws out the code PO453 which I believe deals with the EVAP system and its reading high. I'm going to consider with the problems i've been having that maybe it might be a bad fuel vapor pressure switch on the fuel pump. And its been a while since i've done one of those but it does just simply thread into the pump where the old one simply threads out. Just one other direction and item I forgot to mention, again, great forum and great help!
#260 of 324 Re: Blazer like the title of the blog says wont start!! [iafffireman823] by jbutters Feb 25, 2009 (7:17 pm)
Replying to: iafffireman823 (Feb 24, 2009 5:58 pm) My 2000 Blazer did the same thing.... after researching this for many, many days. This is what causes the problem.   You need a new fuel injection spider, GM upgraded the one that is in your 1999 blazer, to a new spider that has MFI Injectors. It is a direct replacement. All you do is change the whole injector spider as a unit, it has the six new redesigned injectors. The injector unit that is in your truck now was a bad design, and GM knows that now. They always stick, and quit working after about 150,000 miles. The new replacement part fixes all issues with this.   Google " GM Part # 12568332 " and you can read all about this.   GM part #   12568332 - MFI Assembly   17113215 - Seal kit   $300 - $400 from the GM dealer.   Less than $200 from www.GMPartsDirect.com   Read the install notes at this link.   http://www.automotivehelper.com/topic559014.htm   My truck runs like new.

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