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View Full Version : please help 4.3?

PEWTER BLAZER
07-22-2002, 07:37 AM
my blazer is about to drive me crazy i have a92 4.3cpi when i let off the gas and brake fast it will cut off my service engine light comes on every once and a while but most off the time its not on and it will always starts right back up it runs fine other than that it seems to be doing it more now please help. any ideas? :mad:
slurfius
07-22-2002, 10:34 AM
does it cut out when you corner really hard too?
2timeblaz
07-22-2002, 01:31 PM
and does it do it when you're low on gas?
PEWTER BLAZER
07-22-2002, 08:48 PM
it does seem to do it more when i'm low in gas and if i corner hard it many heisetat but has never cut off and some times it does it just when i let off the gas.
s10v8
07-22-2002, 09:01 PM
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mtpockets w/s10
07-30-2002, 09:05 PM
Fuel Filter!!
slurfius
08-01-2002, 03:11 AM
No I have same problem changed filter didn't do anything. I need to drop my tank and check it out.
C-Town216
08-01-2002, 12:21 PM
Mine did it till I replaced my O2 sensor. how do I removed the fuel filter without breaking anything? mine is pretty seized up! Been on for 107,000 miles now! Needs replaced!!!!
ZZ4Blazer
08-01-2002, 02:39 PM
Lots of WD40 or PB Blaster. Let it sit and soak.
slurfius
08-01-2002, 02:59 PM
Mine had 144,000 on it. I took it to get a tune up when I first bought the truck months later lookin underneath it's original fuckin filter. You gotta break it install new fuel line sometimes. Takes less time than waiting for wd40 an if it's seized it probably needs replaced anyway. O2 sensor? Why does gas level effect that? By the way no ses light on mine. I figured the problem was in the tank.
TUCKINRIMINS10
08-01-2002, 03:25 PM
Mine did the same thing till i changed the fuel filter. It worked for me.
donnell89blazer
08-01-2002, 03:58 PM
Change the fuel filter anyway.
slurfius
08-02-2002, 11:45 AM
just changed the filter a month ago and it still does this only on 1/4 tank or less.
Slow Ride
08-02-2002, 12:01 PM
Check the idle position servo. My full size had the same problem.
RedneckBlazer95
08-04-2002, 10:16 PM
prong the top 2 holes on your OBD2 connector under your steering wheel and get the trouble codes out of it and see if anything is shorted out such as O2 sensor or your idle air control cause my blazer does the same thing and my idle air control and my O2 sensor are burnt out
RedneckBlazer95
08-04-2002, 10:17 PM
the top holes two the right that is
slurfius
08-05-2002, 03:13 PM
Yeah I've run the diagnostic mode and got no codes.
PEWTER BLAZER
08-06-2002, 02:07 PM
i changed my fuel filter today but it still cuts off would the knock sensor or vss do this becuase these are the only codes i'm geting
blazer85
08-16-2002, 01:20 AM
you might want to check your idle speed because i had the same problem and i moved it up, i don't know if it is the right way to do it but it worked