misfires, backfires, etc. [Archive] - GrandAmGT.com Forum

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dank_the_tank86
11-01-2006, 03:03 PM
my 00 3.4 just started misfiring and backfiring about a month ago. It only happens when the engines hot. The haynes manual said it could be a bad vacuum hose or possible bad egr or pcv valves.
I've going to see a mechanic next week but diagnostics are going to cost me $65. he said it could be the Bosch Platinums i put in, bad coils, or bad icm.
i checked the coils cold and the resistance was fine. brand new plugs and wires.

any helpful comments would be appreciated

jackal2000
11-01-2006, 03:05 PM
bosch = teh devil

take them ****s out and go ac delco

if i was a betting man i would put my life savings on it

dank_the_tank86
11-01-2006, 03:19 PM
that was the first thing the mechanic mentioned. i wasn't convinced but maybe i'll give that a shot and see if it works

thanks for the advice

Sprucegagt
11-01-2006, 05:02 PM
I would bet on the Bosch plugs as well. The DIS waste spark system used in the GA makes those plugs erode and loose all of there platinum. Read the link, it has some very good info on why you do not use bosch platinums in the GA.

http://60degreev6.com/showthread.php?t=34674&highlight=bosch+plug

Personally given how cheap the AC Delco plugs are, I would just change the plugs first and see if it clears up your problem. You can change the plugs in your driveway.

dank_the_tank86
11-01-2006, 05:52 PM
i owe you guys $65. split it how you want.

bought some ac delcos. car now runs at 100%.
and now this mechanic has my business

thanks again



and jackal - im glad you're not a betting man. . .

jackal2000
11-01-2006, 06:04 PM
and jackal - im glad you're not a betting man. . .

LOL what i didnt mention is my life savings is a few quarters and nickels :iconfused

im glad it worked for ya

Sprucegagt
11-01-2006, 09:07 PM
i owe you guys $65. split it how you want.

bought some ac delcos. car now runs at 100%.
and now this mechanic has my business

thanks again



and jackal - im glad you're not a betting man. . .

You don't owe a thing. Glad I could help.