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1996 Chevrolet Blazer recent lack of power

Tiny
BRENSGIRL
  • MEMBER
  • 1996 CHEVROLET BLAZER
  • 4.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 266,000 MILES
Just this past weekend, i've noticed a lack of power at stops. When I go to accelerate, the blazer doesn't seem like its getting gas, and wants to stall, but with a bit of hesitation, it goes.
Just today driving to work I've noticed the blazer shaking badly from time to time, almost like I have a misfire. (Over the past year, the blazer has been tuned up, and every 3000 miles gets an oil change.) This week I cleaned the throttle body and MAF filter out, thinking this was the issue, but nothing has changed, just progressively getting worse seems like from day to day.
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Wednesday, March 26th, 2014 AT 8:08 PM

7 Replies

Tiny
KNOWLEDGE IS POWER
  • MECHANIC
  • 1,136 POSTS
When you did the tune up did you replace the wires also? It could also be a coil pack or the ignition control module which is just a fancy term for the little flat computer under the coil packs. The packs plug into prongs that corrode so you can check for that before replacement. But don't think that just because plugs are only a year old they won't fail
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Thursday, March 27th, 2014 AT 4:05 AM
Tiny
BRENSGIRL
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  • 4 POSTS
With the tune up I replaced the wires, plugs, rotor, cap, and distributor. I threw a bottle of fuel stabilizer in last night and it didn't act up for me on my way home from work. I don't believe this is a fix but I'm going to check the igm and put it on the scanner to see if any codes pop up.
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Thursday, March 27th, 2014 AT 6:01 AM
Tiny
KNOWLEDGE IS POWER
  • MECHANIC
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Let me know what you find out
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Thursday, March 27th, 2014 AT 6:32 AM
Tiny
BRENSGIRL
  • MEMBER
  • 4 POSTS
MAF/VAF ckt range/perf
System too weak bank 1 & 2
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Thursday, March 27th, 2014 AT 1:10 PM
Tiny
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Sounds like the MAF is going bad and thatll cause the lean condition in both banks. Id replace the MAF but inspect the plug and wires for damage first
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Thursday, March 27th, 2014 AT 3:59 PM
Tiny
BRENSGIRL
  • MEMBER
  • 4 POSTS
Thanks. Will do. Everything else checks out, cleared the codes, no issues driving, got it back on the scanner, no codes. Thanks again for your expertise. :-)
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Thursday, March 27th, 2014 AT 5:57 PM
Tiny
KNOWLEDGE IS POWER
  • MECHANIC
  • 1,136 POSTS
You're so welcome. Glad I could help
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Saturday, March 29th, 2014 AT 1:03 AM

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