From: ravalent@mothra.syr.EDU (Bob Valentine)
Subject: Re: Please help my Blazer!
Organization: Syracuse University, Syracuse, NY
Date: Tue, 26 Jan 93 00:15:00 EST

In article <25JAN199300052715@zeus.tamu.edu> mab3474@zeus.tamu.edu (Myles Barkman-KG5AI Tx A&M Univ.) writes:

>I have been having some trouble with my 90 Chevy Blazer for about a month.  
>Occassionally while driving (usually accellerating) I loose power and the car
>sort of buckles like it wants to stall.  As the car warms up, the problem gets
>worse especially when I have to go from a stop.  Someone told me it could be 
>water in my gas so I tried some remover and it seemed to help.  I put in some
>really good gas too.  But the problem comes back sporadically.  When it is
>really bad, I can't start the car.  When I try to start it, it just cranks
>and cranks and often kicks really hard like the spark is firing at the wrong
>time and kicking the piston down at the wrong time.  I have also smelled
>Hydrogen sulfide a couple of times before I shut the engine off and then 
>couldn't start it.  

     Might want to check that the cat. converter is not plugged.  Easy
way is to hang a vaccum guage on it.  If it starts, and immediately
drops, it could be a exhaust restriction.  COULD be....

>Someone told me it could be crap in my tank and I need to
>get it pressure flushed.  Someone else told me to try techroline.  I did and
>it didn't fix the problem.  I took it to the shop (had to push it the last
>50 feet after stalling) and had the mechanic look at it.  He noticed the
>engine not starting and didn't get to it til the next day.  Problem is, after
>sitting for that long, it started right up and never acted up on him again.
>He checked the computer on the car and it checked out.  He did replace the
>fuel filter which had some restriction in it but he doesn't think that was
>*THE* problem.  It had been nearly a week since I took it in and it still
>works OK but I am afraid and the the mechanic is sure that it will happen 
>again.  I just hope I can make it to the shop when it starts messing up again.
>If anyone knows what is going on or has any ideas, please share your ideas.
>When the car works, it works great.  When it doesn't, it sucks.  Since it
>is so intermittant, I can't see it being the timing belt slipped.  

    This one is a really odd one, but cranking problem could be a
intermittently bad spark control, or even a head gasket leaking water
into the bores while the engine is sitting.   I'd chase down the spark
system really well first, tho.

    How about providing us with some details of what engine you have?
Generally helps in diagnosis.....
>******************************************************************************
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                      -->   Bob Valentine  <--  
                  --> ravalent@mailbox.syr.edu <--