Question about 2002 Chevrolet Blazer
Why does my 2002 chevy blazer cuts out or buck at highway speeds?
Posted by Anonymous on
Is there any check engine lights on? also a leak in the vacuum lines will make it jump in and out of over drive. could be a few problems. wish i could help more, sorry. if you have a vacuum leak it would also make you heater controls not work like they should, like if you put it on defrost it will only come out the vents and so on.
Posted on Jun 13, 2014
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Posted on Jan 02, 2017
sounds like it is in the throttle sensor or idle control valve causing problem not responding fast enough to take over also try the fuel filter could be clogged.
Posted on Aug 30, 2009
the best way is to have the radiator gases analyzed this will tell you if its a head gasket issue for sure and if so when you have it all apart send the heads to a machine shop for x rays to see if they are cracked. Matco tools sells a gas analyzer kit that anyone can use for about 60 bucks.also others on the web.
Posted on Jan 20, 2010
Hi, sounds like your timing chain may have slipped a tooth. Unfortunately, with a pushrod engine, you have to take the front off the engine to check valve timing. Timing gear marks should align as shown below. If they don't, replace the chain.
CAUTION Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
WARNING The outer ring (weight) of the torsional damper is bonded to the hub with rubber. The damper must be removed with a puller which acts on the inner hub only. Pulling on the outer portion of the damper will break the rubber bond or destroy the tuning of the unit.
On 1995-99 models, anytime the front cover is removed, the cover must be replaced upon reassembly. If you reuse the old cover, oil leaks may develop.
The manufacturer suggests you wait until the front cover is mounted to the engine before you install the replacement crankshaft oil seal. This assures the cover is properly supported.
Posted on Mar 10, 2011
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