1994 Chevy Astro

1994 CHEVROLET ASTRO
142,000 MILES • 6 CYL • 2WD • AUTOMATIC
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STRAY30
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  • 2 POSTS
i have a vibration when in park and when i go in reverse the vibration gets worse. I dont know hwats wrong with the van.
Apr 30, 2009 at 11:16 AM
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JDL
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Hello, when was the last time you had a tune-up. A misfire can cause a vibration. Just about anything can cause a misfire, fuel--spark--vacuum leak, several things.

Can you check for codes? Anything?
Apr 30, 2009 at 11:35 AM
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STRAY30
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i know that im due for a tune up. what do you mean by codes? my spark plus and wires are new thought that was the issuse,cause two of the wires were bad.
May 1, 2009 at 2:10 PM
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JDL
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https://www.2carpros.com/forum/automotive_pictures/170934_aldl_13.jpg

Hello, if your datalink connector has 12 cavaties like the picture, you can access trouble codes, if there are any. Use a jumper wire between the A & B terminals, turn the key to on, no crank, the check engine lite starts flashing, you count the flashes to get the codes. Also, I'm not sure of your vehicle vin? Vin W is the spider fuel system, that system is noted for problems. If it is a misfire problem, I can't tell if it is spark or fuel,maybe something else?
May 1, 2009 at 6:20 PM