Last post on Nov 26, 2013 at 1:43 PM
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Chevrolet Blazer, GMC Jimmy, SUV
#256 of 496 Blazer like the title of the blog says wont start!!
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!
#257 of 496 Re: 97 Blazer died while driving wont start [bedard]
Feb 25, 2009 (8:22 am)
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 496 Re: Blazer like the title of the blog says wont start!! [iafffireman823]
Feb 25, 2009 (8:27 am)
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.
#259 of 496 Re: Blazer like the title of the blog says wont start!! [jlflemmons]
Feb 25, 2009 (4:27 pm)
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 496 Re: Blazer like the title of the blog says wont start!! [iafffireman823]
Feb 25, 2009 (7:17 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.
My truck runs like new.
Feb 25, 2009 (6:35 pm)
ok...so heres the deal with my 2000 blazer...230,000+ miles...when the outside air temp gets above 70 degrees...truck wont run...starts and idles, but any pressure on the throttle will cause it to die, sputter, backfire...etc...can feather the throttle to get the rpms up...but as soon as i let off the gas and attempt to give it more...same result...can even idle down the road at about 30 mph with very tricky throttle play...has new fuel pump and filter, coil pack, ignition module( inside the dist cap) and rotor...as well as various other new parts...and again this only happens when the air temp gets above 70...this started last fall...but with cold temp over the winter...has been ok...well spring is here...and had a prob a week ago...so came the new fuel pump(the third one this truck has had in the two years ive had it ) and now that im broke down in FL where its warm...im finding out the pump wasnt the issue....any help would be greatly appreciated...thanks
#263 of 496 Re: help!!!!!!!! [trkrjohnboy]
Feb 26, 2009 (7:40 pm)
It sounds like the Throttle Position Sensor. This is a part on the drivers side of the throttle body.
Or the map sensor. (Manifold Absolute Pressure)
#264 of 496 97 Blazer Eats Starters
Mar 13, 2009 (4:54 pm)
My son had a bearing go bad on his 1997 blazer last August and we bough a rebuilt engine. Got it installed and running just after Christmas. It keeps having starters go out. We bought a reman starter from AutoZone and are on the 6th warranty replacement. At least 2 had solenoid/bendix problems where the motor would spin but not "kick" the bendix. The last one we shimmed thinking perhaps we were binding somehow. Lasted about a week before before it quit- this time it seemed to be a chewed up bendix,but when we pulled it out,what we had was a the "snout" of the starter had fractured off so starter shaft wasn't supported. Flywheel still seems to be OK (no missing teeth, seems to be "true"). The only thing I can think of is something not properly lined up, but what? Trans seems to be properly bolted to engine block. No real adjustment to starter install other than shims. Any ideas?
#265 of 496 Odd starting problem
Apr 01, 2009 (8:19 am)
My 97 Chevy Blazer has a starting issue. If I start the car for the first time of the day it will start fine. After I park it, if I try to start it again within an hour of shutting it off, it just cranks and cranks and cranks. If it cools off and you try to start it, it fires rght up. Can anyone help me with this issue? All Ive done is replaced the fuel pump, and the ignition wires. I replaced the entire ignition system about 3 years ago.