my parents had a 99 chevy s10, they were leasing it and they ran into
problems with the security system and their truck failed to start just like
your discribing, it had somthing to do with the ignition and security system
ey great news on your chevy blazer easy fix if its the same problem if
you vehicle turns over but doesnt start you have a bad Manifold Temp
Sensor. The great thing is it's a cheap and easy fix it cost me 19$ to
replace i will get the part number for you as well Part Number is
WT3036 by Borg Warner got it from my local pep boys
Oh yea my Security light did the same thing
On the flip side if this has been going on for a while you'r fuel pump
has indured a lot of stress and may go out sooner than usual.
Best of luck and if you have any more random blazer questions i can
help most likely
Umm lets see I had the same problem with my blazer that he did the
trademark Security light flash was the same, also with my uncles 1999
s10 that wouldn't start I used a code scanner and hmm let's see
that showed it after many trials of scanning the code. Hmm I replaced
that part and wa la my car starts every time oh yea I also posted it on
another forum and had another positive feedback with success. Oh
another great thing is that a mechanic told me who works for a Gm
Dealerships they replace that part for my code, they first replace the
ignition coil then the Manifold Temp Sensor at no cost, actually they
don't tell you at all they replace it, but that was the culprit of
the problem they just charge you for the ignition coil and installation
which is much greater.
Oh this also went on for many years with my blazer, dhorn66 when you go
to next start your blazer give it gas it may start if you give it
enough. And for all the people i know its fuel injected.
Stevie Mackie i can tell you the answer to your question the 2 things
do concide it will flash and then shut off. But it will stay on while
you drive and randomely cut on as well while driving. I dont understand
why you think my knowledge wont help after lets see 2 years of trial
and error I finally corrected the problem on 3 blazers ok 1 s10 and 2
blazer same 4.3 motor.
I have no idea what you are try to say here. You have a code, they replaced
a part to fix it. Yup, that's what they do, but how does that help the OP.
And what is a Manifold Temp Sensor? Are you refering to the Coolant
Besides your english being quite poor, you know it's fuel injected yet you
are telling him to 'give it gas' while starting and that will help. LOL.
What's your point. I'm not saying what you did to your vehicle did or didn't
fix it, I'm saying that you have no idea what the OPs problem is and you
can't sit there and say well if your security light is on and the truck
won't start that means you have to replace the same part that I replace on
my vehicle, that I don't even know the name of. Also, if I read correctly,
you are trying to say the Coolant Temperature Sensor being faulty will cause
the security light to flash. That's absurd.
Ok when Dhorn66 fixes his car i hope he will post the results of what
fixed it. Then all of you guys will see.
Ok my ideas hmm lets see its an idea 1 solution. The Manifold Temp
Sensor which is an extremely easy part to replace, and cheap might i
add. Oh heres another ideas for you guys who dont believe take out your
manifold temp sensor and you will have a simulated problem that he did
but then again you wont start. Might i add my car would start about
30-40 minutes later. Also the problem is not always consistent but it
does worsen from time to time
Ok guys my question is whats your answer to his problem change the
ignition module which cost alot, then change the ignition coil, well if
you know anything about cars the Manifold Temp Sensor ties into all of
If I read correctly,
you are trying to say the Coolant Temperature Sensor being faulty will
the security light to flash. That's absurd.
On the Chevy blazer the security system starts to flash after
unsuccessful starts thinking that you have inserted the wrong key and
not starting has nothing to do with the part except that causes it not
I see where you are going with this. That's doesn't sound possible. However,
how do you know that's what is causing his truck not to start. How do you
know his key isn't worn out or the ignition cylinder is worn/damaged?
Telling someone to replace a part on precedent alone is risky business.
Diagnose it first, then replace the appropriate part.
Because when the ignition cylinder wears it usually dies completly not
allowing it to work furthermore
another way to test for a damaged ignition cylinder is when he starts
push his key in much further than usual. and make sure the blazer is
fully in park as it may be sensing its in drive is also a possibilty
But with all previous experience with the blazer its usually a bad
manifold temp sensor sounds crazy i know he can even check the
connection that can help as well thats what he should do first is make
sure the connection is good and not crusty
Hey but i have to say with all the people who respound to this forum
his car will be fixed
Wait not the ignition cylinder my bad i was refering to the ignition
coil when that dies it dies altogether but what he can do to test for
the bad ignition cylinder is put the key in harder and try a spare keys
which i did and i thought that was the problem but then again it
occured with my spare key
If the ignition cylinder turns, then there is no problem with the
cylinder, putting the key in "harder" will accomplish nothing.
You seem to have a very basic misunderstanding of how;
the ignition lock works
how the ignition switch works
how the passive anti-theft system works
various failure modes of ignition coils
You also have a misunderstanding WRT the fact that there is no
manifold temperature sensor and that it is in no way related to
the security light.
For the OP, it's highly probable that you have a failing ignition
switch, it is a very common problem on mid-late 90s GM trucks.
so your telling me that there is no such thing as a manifold temp
sensor part number wt3036 which cost 19 dollars at local pep boys which
is by borg and warner and that also since there is no manifold temp
sensor my 2000 chevy blazer fixed itself by my imagination.
Oh my god i must of given 19 dollars to someone else which in fact they
did nothing. I may not have a great understanding of the ignition
clyinder but i sure as hell know there is something called a manifold
temp sensor and after replacing that part my car starts with no problem
Oh wait my blazer also had the same problem as the OP so i told him
what to replace geez guys i never knew that telling someone whats wrong
with there car was so bad and that you all get so defensive
Talking about lack of knowledge aarcuda69062 you dont even no that
there is such thing as a manifold temp sensor i will post a pic in the
forum for you if it allows or i will post it online elsewere
Ok a manifold temp sensor is the same thing as a temperature sesnor and
its code is MAT when diagnosed
The reason this is most likely his problem is that it is misreading and
he can start his blazer 30-40 minutes later
I want to help this guy as much as you all do
When my blazer failed I was told it was the security system and the
ignition cylinder as well and about 5 other things they said went wrong
but I replaced one part after borrowing a code scanner and it took
about 15 trials to read a code because the part had to fail in order to
read the code I also went to a local dealership and they were able to
retrieve zero codes but that was before borrowing the code reader.
Indeed, where by chance does this "manifold temp sensor" mount?
Careful here because I've R&Red many intake manifolds from 4.3
liter engines, and have yet to encounter one.
Or, it's possible that your recollection of the problem is skewed
as is your remembrance of the part name, or, it's entirely
possible that someone including Borg Warner is calling the part
by a name other than what it really is known as.
The whole thing is moot since the part that you're erroneously
identifying has no control over anything other than spark advance
and fuel trim when the engine is in closed loop. IOWs, it can
not cause a stall or a no start.
No one is getting defensive except you. If you can't stand being
corrected, avoid usenet.
Please, post a picture of it in the rubber intake duct ahead of
the throttle body, away from the manifold it supposedly measures
the temperature of.
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