Pop and backfire,2500-3000 RPM

[puptote]

Hello all, new guy here. Just bought an '03 GT ,49k miles.Problem is abucking and backfire when accelerating,happens between 2500-3 k rpm,then levels out.I am not an ace mechanic,but can do minor repairs
Would new plugs and wires help, or any other ideas as to cause?
Any and all responses would be greatly appreciated,Thanks.

[wait4me6920]

quote:Originally posted by puptote

Hello all, new guy here. Just bought an '03 GT ,49k miles.Problem is abucking and backfire when accelerating,happens between 2500-3 k rpm,then levels out.I am not an ace mechanic,but can do minor repairs
Would new plugs and wires help, or any other ideas as to cause?
Any and all responses would be greatly appreciated,Thanks.

A new set of plugs and wires - make sure you get something better than stockers, I use Magnecors, but there are other good sets as well - would certainly be in order with 49k. This is something you can easily do yourself. Gap them a bit tighter than stock - especially if you go with iridiums which should be gapped at around .030. Check air filter, turbo fittings for leaks, etc.

If this does the trick, great. If not, more troubleshooting is in order. Let us know how it's going...[?]

[Mean Green]

I used Magnecor wires on my '03 GT and they worked well. I used stock copper plus plugs gapped at .040 and my 280 hp GT ran very well. Irridium plugs are overkill, more expensive and do nothing for performance. Friend of mine ran stock plugs in his PT turbo at the track, switched to irridiums and there wasn't a bit of difference.

[puptote]

Thanks fellas. I'll get the wires and plugs this week and get back to you. Many thanks.

[Sturdevant]

Sounds like a problem I had. Turned out to be wires.

[quicksilverdon]

I bet on wires, too. The stock ones are made from linguini, I think...

[puptote]

Put on the wires (Magstar 8.5) and copper Champions. Ran great for 2 days, then started to miss again, today I'm re gapping to 40 to see how it works. Thanks again ,John

[bobs turbo pt]

hi john, my first 03 turbo did the same thing they changed everything and after 48 days in the dealership they let me pick a new car , please let us know what happens good luck !!

[puptote]

Looks like gapping the plugs at .040 did the trick. Has been running great since change made. Thanks all.

[wait4me6920]

quote:Originally posted by puptote

Looks like gapping the plugs at .040 did the trick. Has been running great since change made. Thanks all.

Alllllright!

In today's worrisome world, it's always great to read of a happy ending...