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Username Post: 99 Camaro coil pack failure? HELP PLEASE!        (Topic#339026)
Tony UK 
Forum Newbie
Posts: 6
Tony UK
Loc: Birmingham UK
Reg: 09-12-16
09-12-16 03:12 PM - Post#2650881    

Hi, I have a 99 european spec v6 3.8 DIS Camaro which has recently developed a misfire on examination it seems one coil pack is failing to fire. changed out this coil and swopped them around but the third coil always fails to fire. I know all 3 coils are good. Any ideas would be welcome. No American car service centres here!!
First time the car has let me down since 2003



 




CowboyTrukr 
"7th Year" Silver Supporting Member
Posts: 3968
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
09-12-16 11:14 PM - Post#2651005    
    In response to Tony UK

What about a cam or crank sensor, Tony?

Seems that if you moved coil packs but the same one is still misfiring, it would be one of those two. I haven't had the pleasure of driving a GM 3.8 in over 20 years, so I'm reaching for straws here.

Greg

Greg

'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500
'00 Explorer XLT 4.0 V6 Auto
'94 K2500 5.7 NV4500 ECLB - SOLD
‘87 GMC S15 SCLB 4.3 Auto - SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


 
Tony UK 
Forum Newbie
Posts: 6
Tony UK
Loc: Birmingham UK
Reg: 09-12-16
09-13-16 02:43 AM - Post#2651016    
    In response to CowboyTrukr

I was thinking along the same lines, I will try to find someone with a diagnostic unit to see if any faults show up before going down the route of getting sensors shipped..very few stores here have any stock and they then charge the earth for the pleasure of robbing you! thanks for reply!



 
acardon 
Ultra Senior Member
Posts: 11019
acardon
Loc: DFW TEXAS
Reg: 03-25-05
09-13-16 06:25 AM - Post#2651038    
    In response to Tony UK

  • Quote:
developed a misfire on examination it seems one coil pack is failing to fire.



How did you determine it was a coil pack. The coils mount on an ICM. Link to ICM. That could cause one cylinder failure.

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
Tony UK 
Forum Newbie
Posts: 6
Tony UK
Loc: Birmingham UK
Reg: 09-12-16
09-13-16 09:12 AM - Post#2651075    
    In response to acardon

I swopped coil packs around in turn, and the same position failed every time, the rear most coil.
No spark generated from either tower in that position. Have now removed and done visual examination of ICM no corrosion visible but am trying to find a replacement in the UK at reasonable cost as it seems most likely cause of problem. so far cheapest in uk has been $190 yes dollars..so still looking!



 
wagonman100 
Super Senior Member
Posts: 14002
wagonman100
Loc: Baltimore, MD
Reg: 11-27-04
10-14-16 06:55 PM - Post#2656570    
    In response to Tony UK

Are you sure power is getting to that coil position?

Jay
Some days it's not worth chewing through the restraints.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon


 
2plus2 
Member
Posts: 1137

Loc: Mission,BC
Reg: 02-03-05
10-14-16 10:28 PM - Post#2656601    
    In response to wagonman100

  • wagonman100 Said:
Are you sure power is getting to that coil position?


This
And make sure the wiring going back to the pcm is good

69 Canadian Pontiac 2+2
factory L48 350 Chev,TH350,PW,PT
99 Silverado RCLB 4.8 NV4500 14BSF 4.10's locker 6" Procomp 35 bfg m/t's 9k winch cutout flares
07 Town Car Loaded,Tinted,Getting Bagged


 
gchemist 
Senior Chevytalk Moderator
Posts: 24359
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
02-07-17 09:36 AM - Post#2675611    
    In response to 2plus2

I use this website for working on a 3.8L.
http://troubleshootmyvehi cle.com/gm



'95 Jimmy SLT (Bought @131,814)
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 




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