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02-25-2007, 09:10 PM
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Join Date: Feb 2007
Posts: 5
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93 blazer ecm code 42
hi i've got a 93 blazer 4.3 vortec have rough idle, low power, engine light on, and get code 42. heres what ive already done: replaced high dollar egr valve.. replaced IAC valve ... and replaced spider injectors ... all to no avail .... am pulling out what little hair i have ... if anyone can shed some light on this i will be eternally grateful 
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02-25-2007, 09:43 PM
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Junior Member
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Join Date: Nov 2006
Location: Northport, Long Island, NY
Posts: 270
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RE: 93 blazer ecm code 42
code 42 is a malfunctioning EST or electronic spark timing, could be a bad circut or just the distributor
__________________
1992 s10 4.3 262 tbi 4x4x2 700R4
1999 s10 2.2 134 L4 vortec 2wd pickup manual
Refuse to lose, Born to booze
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02-25-2007, 10:48 PM
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Join Date: Feb 2007
Posts: 5
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RE: 93 blazer ecm code 42
ok thanks i have determined all that what im looking for is how to fix it ... ive spent $600 on it today alone and nothing has worked ... is it the electronic control module or something else ... ive replaced wires plugs dist cap and rotor as well as the other items mentioned above
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02-25-2007, 11:23 PM
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Junior Member
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Join Date: Oct 2006
Location:
Posts: 402
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RE: 93 blazer ecm code 42
Here is the trouble tree for that code. As you will see it could be the module, wiring, or the ECM. Korey
Well for some reason it will not load on this post.
*combined consecutive posts*
Here I will try again. Korey
__________________
Korey
2000 Blazer LT, 30X9.5x15 Dueler AT, Cold air intake, Magnaflow exhaust.
ASE Master Auto Tech.
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02-26-2007, 01:13 PM
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Join Date: Feb 2007
Posts: 5
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RE: 93 blazer ecm code 42
thats all well and good .... but greek to me ... if its the EST where the heck is it to replace it? .... if its a module ... which one? ... the one near the left front of engine or is it like the OLD dists. and under the cap and rotor? i know beans about these new vehicles ( can rebuild older ones blindfolded)
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02-27-2007, 01:26 PM
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Join Date: Feb 2007
Posts: 5
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RE: 93 blazer ecm code 42
ok guys so im an idiot and totally illiterate to the ways of these newer cars but can someone at least give me a way to get the list and location of all sensors and modules on this 93 S10 blazer? has the vortec V6 with engine code "W" .. tired of it nickle and diming me so ill just try to replace everything that has to do with sensors an modules
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02-27-2007, 02:12 PM
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BF Veteran
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Join Date: Jun 2006
Location: Vancouver. B.C. Canada
Posts: 3,429
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RE: 93 blazer ecm code 42
I have no info for a '93 but I found this on the internet. I hope it helps a little.
http://www.fieros.de/en/v6help/code42.html
I just re-read the article and it looks like the hardest part of the job is removing the distributor cap. You also need a test light and I recommend an LED test light.
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02-28-2007, 03:48 AM
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Join Date: Feb 2007
Posts: 5
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RE: 93 blazer ecm code 42
thanx ... have already replaced the ignition module ... discovered after removal it was dry .... now it will not start at all ... tried once to start and backfired then nothing .. yes plug wires are in correct order... now after $700 i have a decent set of mudder tires on a useless truck lol
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02-28-2007, 03:48 AM
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Tags
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1992, 42, 43, 93, blazer, blazers, chevy, code, dollar, ecm, electronic, est, spark, test, timing  |
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