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Check engine light

Tiny
B.H.
  • MEMBER
  • 2003 CHEVROLET ASTRO
  • 100,000 MILES
What would make the check engine light flash when the motor downshifts climbing a hill at 60 mph and sputters a little when accelerating until turned off and restarted? Van has no egr, so what could it be?
Wednesday, April 13th, 2011 AT 4:17 PM

10 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
It sounds like you have a throttle bore that needs to be cleaned but to be sure we should run the codes here are two guides to help you fix the problem or find out whats going on.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/throttle-actuator-service

Please run down these guides and report back.
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Wednesday, April 13th, 2011 AT 4:24 PM
Tiny
SAM.SMALL
  • MEMBER
  • 2 POSTS
FYI it was a dirty throttle bore on my car all fixed! I love this site.
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Wednesday, June 26th, 2019 AT 12:06 PM
Tiny
BORGWARD
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 134,000 MILES
I am having two problems with my 03 Astro. I get a check engine light on the dash and at some gas stations I am unable to put more than a gallon of gas into the tank. The engine code tells me that there is a problem with the fuel system venting. Does anyone know what the filter is that needs to be replaced or how to determine which filter needs replacement. Thanks, Art
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Wednesday, June 26th, 2019 AT 12:07 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
There is a vaccum line on the fuel tank that lets off fuel vapor so it doesnt build up in the tank, it vents off the fuel vapors so you can fill the car and so it doesnt pollute the air. From the tank it goes to the Carbon cansister via vaccum line and is resting there untill the car is started of which then it burns off the vapors. If that line is plugged up or kinked the vapors will not release.
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Wednesday, June 26th, 2019 AT 12:07 PM (Merged)
Tiny
FIREMAN27
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET ASTRO
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 107,000 MILES
My check engine light came on what should I do?
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Wednesday, June 26th, 2019 AT 12:07 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis, finding out what's going on.
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Wednesday, June 26th, 2019 AT 12:07 PM (Merged)
Tiny
ROBERT LAWES
  • MEMBER
  • 2 POSTS
  • 2003 CHEVROLET ASTRO
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
I changed the o2 sensors, how does the engine light reset?
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Wednesday, June 26th, 2019 AT 12:07 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You have to reset it with a scanner. Changing O2 sensors necessarily will not release the light. Most auto parts store check these for free tosee whatthe problem is.
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Wednesday, June 26th, 2019 AT 12:07 PM (Merged)
Tiny
SCABBEYHAYES
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 100,000 MILES
My check engine light comes on under load at about 50 mph. It comes up misfire #5 cylinder every time. I've given it a tune-up. Replaced the injectors. No solution. What else should I check. Mechanics here don't know what it is.
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Wednesday, June 26th, 2019 AT 12:07 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi:
Have the coil pack checked. It may be going bad and not providing enough power under a load.

Joe
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Wednesday, June 26th, 2019 AT 12:07 PM (Merged)

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