SPONSORED LINKS

2000 Chevy Astro MISFIRES WHEN TURNING ENGINE OVER

Tiny
MCARVER
  • MEMBER
  • 2000 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 297,000 MILES
AFTER INTAKE MANIFOLD GASKETS WERE REPLACED WHICH INCLUDED REMOVING DISTRIBUTOR AND ALL ENGINE SENSOR CONNECTORS, THE ENGINE WOULD BACKFIRE THRU THE INTAKE AS IF TIMING WAS OFF. THE TIMING WAS CHECKED WITH NO 1 ON COMPRESSION STROKE AT TDC AND DRISTRIBUTOR ROTOR POINTING RIGHT AT NO 1. STILL BACKFIRED AND NO START. ANY SUGGESTIONS?
SPONSORED LINKS
Tuesday, December 8th, 2009 AT 2:14 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Where does it backfire from the intake or exhaust?
Was this
answer
helpful?
Yes
No
Monday, December 21st, 2009 AT 7:38 AM
Tiny
MCARVER
  • MEMBER
  • 4 POSTS
As I stated in the forum, it would backfire thru the INTAKE and catch the excessive fuel on fire as if timing was way off. MAKING SURE no. 1 is on compression stroke and at TDC by checking with the mark on the harmonic balancer, has been repeated a dozen times.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, December 21st, 2009 AT 8:30 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
The only thing I can think of is to check the crank sensor. Also, if it is firing through the intake, you could have an intake valve problem. Have you checked compression? As far as the timing, you did it right.
Was this
answer
helpful?
Yes
No
Monday, December 21st, 2009 AT 8:56 AM

Please login or register to post a reply.

Related Engine Misfire Content

Intermittent Misfire
VIDEO
Intermittent Misfire
Instructional repair video
Misfire Random Code P0300
GUIDE
Misfire Random Code P0300
The world of automotive diagnostics can be complex, with numerous codes and potential issues to keep track of. One of the more common engine diagnostic codes is P0300, which...
VIEW MORE

Sponsored links