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misfiring


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redblade
New User

Jan 1, 2011, 5:21 PM

Post #1 of 4 (2718 views)
misfiring Sign In

why is my 2001 chevy venture misfiring on demand ? I have replaced plugs,wires,coil packs,& ignigion module still doing it ...
any help would b very thankful...


Sidom
Veteran / Moderator
Sidom profile image

Jan 1, 2011, 6:46 PM

Post #2 of 4 (2700 views)
Re: misfiring Sign In

Personally I would stop demanding it to misfire.........Sly

Ok, ok.....lame I know but I'm getting help for that....

1st you need to narrow down which cyl/cyls are misfiring and start off with a compression check. Since you've already changed all the ign stuff I would try swapping the injectors.

I'm assuming when you say "on demand" you mean under load. That is usually an ign problem but not always.

1st things 1st.. Start off with verifying the mechanical condition of the engine, pull codes and also let us know what engine you have....

If it's a 3.1 or 3.4 that is missing on 5 & 6 with the oil light on, then the new will be real bad...........


redblade
New User

Jan 1, 2011, 8:09 PM

Post #3 of 4 (2688 views)
Re: misfiring Sign In

tnx 4 answering
ys by demand I do mean with load at idle or even in park when giving it throttle it will not misfire
it is a 3.4 the only light that will come on is the battery light .We have check no codes Have put a meter on the alt. it is fine & 2 month ago we just put a new battery in it ...The battery light only comes on 4 a moment more of a flickering but only when its misfiring . That what makes us think its electrical . The compression is fine in all cylinders...the check engine light does not come on ..


redblade
New User

Jan 6, 2011, 4:14 PM

Post #4 of 4 (2651 views)
Re: misfiring Sign In

well I have the problem resolved
I took my 2001 chevy van in 2 the GM dealership this morning & they traced the problem to a melted wire that was laying on the on the manifold






 
 
 






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