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#1 spark plug wire it runs like crap disconnect

Tiny
JIMMIE JOHNS
  • MEMBER
  • 1997 CHEVROLET ASTRO
  • 14,237 MILES
I have a 1997 chevy astro van 4.3 liter vortech with the csfi injection and the ignition system. Whenever I hook up the #1 spark plug wire it runs like crap disconnect it and other than a little lack of power it runs great!

Noticed a little power loss so I decided to change the plugs when doing so I noticed that the #1 plug wire was broke so I also changed the wires after doing so the van ran worse after checking over every thing several times I decided to disconnect that #1plug and bam ran fine I'm stumped

please help
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Sunday, February 5th, 2012 AT 4:23 AM

4 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Are the other leads on correct plugs?
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Sunday, February 5th, 2012 AT 4:49 AM
Tiny
JIMMIE JOHNS
  • MEMBER
  • 2 POSTS
YES EVERY THING IS WHERE IT NEEDS TO BE IVE TRIPLE CHECKED EVERY THING IT ALSO HAS A NEW CAP AND ROTOR
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Sunday, February 5th, 2012 AT 5:18 AM
Tiny
SPLINTER
  • MEMBER
  • 1 POST
I have the same problem but it is #3 if I remove the plug wire it runs better but if I replace it then I get a poping sound and poor performance
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Wednesday, February 8th, 2012 AT 11:12 PM
Tiny
CCUPDAVE
  • MEMBER
  • 61 POSTS
Sound's like you need to do a compression test to make sure your valves are ok. If that checks out ok you have to have the wires crossed.
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Thursday, February 16th, 2012 AT 2:45 AM

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