- #250 of 318
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Re: 97 Blazer died while driving wont start [bedard]
by jlflemmons
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Feb 22, 2009 (8:18 pm)
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Replying to: bedard (Feb 22, 2009 4:04 pm)
You may have a code set anyway. The symptom described can be a number of things, and I don't want to send you down the road of parts swapping. Did the new engine come with a distributor, or did you pull the one from the old engine? If from the old, was the rotor and cap changed? A MAP sensor will do this also where all is good and suddenly every thing goes nuts because of a bad input to the computer causes fuel mix to go way off, ignition timing, all sorts of problems. But a number of other sensors can also cause similar issues, like the crank position sensor.
These things aren't cheap. See if you can find a buddy with an OBDII scan tool. Autozone will check it for you, but the car has to be at their store and it sounds like that isn't going to happen!
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- #251 of 318
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Re: 97 Blazer died while driving wont start [jlflemmons]
by 92hatchbackk
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Feb 24, 2009 (8:37 am)
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Replying to: jlflemmons (Feb 22, 2009 8:18 pm)
ok so check this out.. I got a 97 blazer 4x4, and last week i did plugs/wire, fuel filter, and cleaned the cap an rotor cause i replaced em last year. i drove the truck after and it was solid, my dad drives it and about 3 miles from my house the truck backfires and and shuts off... wont start again. so we didnt hear the fuel pump turning on so i dropped the tank and replaced that and the tank breather that broke the first time we replaced the fuel pump, and now the truck has plugs,wires,fuel filter, and fuel pump and still wont start!! i know its not the coil cause that shocked the hell out of me.. can someone pleaseeee help me out im struggling to keep my sanity!
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- #252 of 318
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Re: 97 Blazer died while driving wont start
by sandwichman
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Feb 24, 2009 (1:03 pm)
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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.
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- #253 of 318
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Re: 97 Blazer died while driving wont start [sandwichman]
by elaney1981
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Feb 24, 2009 (1:19 pm)
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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.
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- #254 of 318
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Re: 97 Blazer died while driving wont start [elaney1981]
by sandwichman
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Feb 24, 2009 (1:58 pm)
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Replying to: elaney1981 (Feb 24, 2009 1:19 pm)
LOL - read my message!
I fixed my problem.
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- #255 of 318
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Re: 97 Blazer died while driving wont start [jlflemmons]
by bedard
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Feb 24, 2009 (4:45 pm)
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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.
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- #256 of 318
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Blazer like the title of the blog says wont start!!
by iafffireman823
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Feb 24, 2009 (5:58 pm)
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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! 
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- #257 of 318
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Re: 97 Blazer died while driving wont start [bedard]
by jlflemmons
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Feb 25, 2009 (8:22 am)
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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.
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- #258 of 318
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Re: Blazer like the title of the blog says wont start!! [iafffireman823]
by jlflemmons
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Feb 25, 2009 (8:27 am)
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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.
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- #259 of 318
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Re: Blazer like the title of the blog says wont start!! [jlflemmons]
by iafffireman823
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Feb 25, 2009 (4:27 pm)
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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!
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