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Chevy Astro Bucking Problem

12 messages,  Last post on Sep 14, 2009 at 12:31 PM

You are in the GMC Safari & Chevy Astro Forum.

What is this discussion about? Chevrolet Astro, Van

Messages Page 2 of 2

#3 of 12 Re: 2000 Astro bucking problem [captaincanada0] by captaincanada0

Mar 31, 2007 (6:11 pm)

Replying to: captaincanada0 (Mar 27, 2007 4:51 pm)
I fixed mine!!!! ya!!!!! i just put in a new rotor and cap ! but you must take an air hose to the inside of the distibutor! there is little flakes of metal dust in there , thats what made it fun so bad! make sure the drain hole on the bottom of the distributor are clean and clear! mines working fine now for sure!!

#4 of 12 Re: 2000 Astro bucking problem [jef1qr] by buffdizzle

Apr 15, 2007 (12:10 am)

Replying to: jef1qr (Mar 20, 2007 5:23 am)
What do you mean by "bucking??"

#5 of 12 Re: 2000 Astro bucking problem [buffdizzle] by jef1qr

Apr 15, 2007 (8:32 am)

Replying to: buffdizzle (Apr 15, 2007 12:10 am)
Missing, bad firing.
 
The problem was I had a cracked coil, which was destroying the dist. cap to soon. Fixed the coil, now runs great.

#6 of 12 Re: 2000 Astro bucking problem [jef1qr] by mxer746

Apr 20, 2007 (4:39 am)

Replying to: jef1qr (Apr 15, 2007 8:32 am)
Mine is doing the exact same thing. I also found out that the colder and wetter it is, the worse it is. I've changed the Cap and rotor, plug wires, ignition coil, Mas air flow sensor, intake manifold air temp sensor, and fuel filter.

#7 of 12 Re: 2000 Astro bucking problem [mxer746] by mxer746

Apr 22, 2007 (9:30 pm)

Replying to: mxer746 (Apr 20, 2007 4:39 am)
Discovered the problem and how to fix it. Apperhently, when GM made the distrubitors, they didn't heat treat the gear at the bottom right, and the upper bushing is prone to wear. All this allows for slop in the cap between the rotor and the cap contacts, allowing the spark to occ jump to nearest/wrong contact. Especially with moisture in the cap, it's a lot more pronounced. This could explain why I was eating distributor caps, like 3 in 3 months. Replaced the cap and distributor, and went for a 1000 mile trip over the weekend 500 miles of that pulling a motorcycle trailer, with no problems.

#8 of 12 Re: 2000 Astro bucking problem [mxer746] by dsiever

Sep 27, 2007 (6:27 am)

Replying to: mxer746 (Apr 22, 2007 9:30 pm)
Hi,
 
I am having a similar problem with my Safari van. Did you replace the distributor? Was this problem accompanied by starting problem too? My van used to start on the first crank no matter what the weather was like. Now I have to hit it two or three times. Let me know at your earliest convenience. Thanks.
 
regards,
Doug

#9 of 12 Re: 2000 Astro bucking problem [dsiever] by captaincanada0

Feb 10, 2008 (6:45 pm)

Replying to: dsiever (Sep 27, 2007 6:27 am)
ya im back! you were right! the distibutor wore out! a new cap and rotor helped for a month or 2 but then it starting bucking again! I had to get a new aftermarket distributor now all is better! damn cheap gmc manufacturing! now its up for sale and im going to buy toyota from now on! sorry GM you brought this on!

#10 of 12 Re: 2000 Astro bucking problem [mxer746] by ddreier

Jul 18, 2009 (7:05 am)

Replying to: mxer746 (Apr 20, 2007 4:39 am)
Sounds like my 2000 safari.
Did a complete tuneup
But when the weather was wet it would misfire give me a check engine and registar a p300 error code.
When dry out the problem would go away.
No one could correct the problem.
I did notice though that when the problem started that when it was cold and wet that the turn signal switch would also start acting strange.
I noticed that the misfires and the turn signal switch problem occured at the time.
I replaced the turn signal switch.
All my problems went away after almost 2 years of hell when it rained or snowed.

#11 of 12 Re: 2000 Astro bucking problem [jef1qr] by tkuphal

Sep 14, 2009 (6:36 am)

Replying to: jef1qr (Mar 20, 2007 5:23 am)
I have a 94 astro w/ same problem. After new wires. plugs, cap, rotor and fuel reg. rebuild it still does it. What fixed it

#12 of 12 94 astro problem by tkuphal

Sep 14, 2009 (12:31 pm)

Fuel pump fixed it. Bad connection in the tank and a build up metal filings in the motor made it pump under the specs. My distribuator was just fine after 200k and the motor runs and acts like new.

Messages Page 2 of 2

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