After replacing alternator, engine cranks but won't catch.

scosby
0

Asked by scosby Nov 30, 2012 at 05:36 PM about the 2003 Chevrolet TrailBlazer

Question type: Maintenance & Repair

Alternator went out & my husband replaced it.  Now when you try to start it, it sounds like it would if it were out of gas.  It won't start.  What could have gone wrong?

1 Answer

John Saffrahn
22,105

Have you tried jumping it? The engine requires approximately 9.5- 10 volts to crank depending on the battery and engine size. The computer requires an additional 1- 1.5 volts. A battery can have enough voltage to crank but have nothing left for the computer to run. The bad alternator could have left the battery in that charge where it seems ok but isn't.

Your Answer

Add photo

Related Questions

  • traction lights come on/check engine light always on. car feels like it sways sometimes on the road. 1 answer

    we drove 8,200 miles to alaska. the last 2k miles were awful. mostly dirt and full of pot holes. we had to catch a ferry ride and then the problems began. once we got off the ferry the check engine li...

    2007 Chevrolet TrailBlazer LS

    -

    Maintenance & Repair

  • 05 cavalier wont catch 6 answers

    my car wont catch.. everyone said it was the fuel pump, I replaced the fuel pump and filter and it still wont catch... yesterday i sprayed some started fluid in the throttle, it cranked but when it tu...

    2005 Chevrolet Cavalier

    -

    Maintenance & Repair

  • 96 Chevy S10 Blazer with 4.3 L engine vortex will turn over but won't start. Why? 59 answers

    The RPM's fluttered and it died. The PCM code read that it was the crankshaft sensor. We have checked the following: coil - replaced fuses - good control module (ecm) - replaced plug wires - replaced...

    1996 Chevrolet Blazer 4 Dr LS 4WD SUV

    -

    Maintenance & Repair

  • Why won't it start???? 6 answers

    I have a 2001Chevy Blazer with the 4.3 Liter V6 Vortec engine. Last Thursday the car stopped accelerating but was still running, then died completely. The battery light came on as soon as it had stopp...

    2001 Chevrolet Blazer 4 Dr LT SUV

    -

    Maintenance & Repair

  • 2003 Malibu is turning over but won't catch. 1 answer

    Daughter's boyfriend tried directly injecting a little gas and she caught no problem and ran until no more fuel (she's not out of gas btw). He thinks it's the fuel filter and thought it was an easy fi...

    2003 Chevrolet Malibu

    -

    Maintenance & Repair

Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 dandyoun
dandyoun
Reputation 380
#2 Tom Demyan
Tom Demyan
Reputation 300
#3 lindatbrennan
lindatbrennan
Reputation 270
View All

Related Models For Sale

Used Chevrolet Tahoe"
389 Great Deals out of 25,777 listings starting at $1,991
Used GMC Envoy"
87 Great Deals out of 2,074 listings starting at $1,995
Used Jeep Grand Cherokee"
823 Great Deals out of 57,237 listings starting at $1,995
Used Chevrolet TrailBlazer EXT"
60 Great Deals out of 1,223 listings starting at $995
Used Ford Explorer"
748 Great Deals out of 42,271 listings starting at $1,495
Used Chevrolet Silverado 1500"
1,579 Great Deals out of 137,065 listings starting at $1,450
Used Chevrolet Blazer"
11 Great Deals out of 1,573 listings starting at $500
Used Chevrolet Impala"
1,496 Great Deals out of 55,955 listings starting at $1,399
Used Dodge Durango"
227 Great Deals out of 19,374 listings starting at $1,000
Used Ford F-150"
1,857 Great Deals out of 110,223 listings starting at $1,350
Used Toyota 4Runner"
231 Great Deals out of 10,192 listings starting at $2,388

Used Cars For Sale

2009 Chevrolet TrailBlazer For Sale
3 Great Deals out of 81 listings starting at $6,195
2008 Chevrolet TrailBlazer For Sale
36 Great Deals out of 663 listings starting at $3,395
2007 Chevrolet TrailBlazer For Sale
25 Great Deals out of 779 listings starting at $1,995
2006 Chevrolet TrailBlazer For Sale
27 Great Deals out of 772 listings starting at $2,800
2005 Chevrolet TrailBlazer For Sale
39 Great Deals out of 726 listings starting at $2,982