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Chevy Astro Misfire

6 messages,  Last post on Jul 18, 2009 at 5:53 AM

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#2 of 6 Chevy Astro missing sometimes by teamster108 Mar 28, 2007 (9:27 pm)
Sometimes my Chevy Astro misses and sometimes not seems worse when it is damp or real cold. Any Ideas? It idles fine only when under a load will it miss. Thanx Replies to this message: spike99 (Jan 20, 2008 11:56 am) ddreier (Jul 18, 2009 5:53 am)
#3 of 6 Re: Chevy Astro missing sometimes [teamster108] by spike99 Jan 20, 2008 (11:56 am)
Replying to: teamster108 (Mar 28, 2007 9:27 pm) My previous '95 Safari van's engine would sound rough as well. Like it was miss-firing. My mechanic lifted its hood, took a garden hose and sprayed water into its engine area. He started at bottom of engine and worked his way up. When the water hit the spark plug wires and dist cap, she sounded like a engine with a large wrench in it. Talk about "miss firing and clug / clug" sounds. Discovered my fan had a faulty distributor and bad plug wires. After replacing, my previous '95 van sounded great.   If you can, spray some water in your van's engine compartment (at night time for best visual results) and see what happens. An "old school" testing trick that many mechanics still use today....
#4 of 6 Nice van with a big problem by emaydogg Sep 14, 2008 (6:37 am)
I just purchaced a 1986 Chevy Astro van and I know that with a van of that age there will be problems. I changed out the fuel filter and then I added new wires and spark plugs. I am still having the problem when I get to a red light the van wants to cut off. What could be the problem? Replies to this message: jonkez (Oct 12, 2008 5:17 pm)
#5 of 6 Re: Nice van with a big problem [emaydogg] by jonkez Oct 12, 2008 (5:17 pm)
Replying to: emaydogg (Sep 14, 2008 6:37 am) Ok Lads I wrestled with this one a while. GM in their wisdom made the Distributor cap very thin and this causes moisture to build up during cooling! The Fix for the random misfires is simple: just use a clean towel and spray some WD40 liberally to the towel, carefully rub the solution on the PLASTIC PARTS ONLY (Interior of Cap)! None on the Pins or the Carbon center! This has proven to be a long solution to this problem! I have had no misfires for TWO MONTHS since I did this! The BULL about using a GM part is just that BULL! Enjoy!
#6 of 6 Re: Chevy Astro missing sometimes [teamster108] by ddreier Jul 18, 2009 (5:53 am)
Replying to: teamster108 (Mar 28, 2007 9:27 pm) On my 2000 Safari it was a bad turn signal switch. Replaced it and all the problems went away.   I am not kidding that was the problem. if your turn signal is acting up I would look at this as the problem.   My van has run without any problems now for a year now. Who would have thought that this would cause the problem.

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