backfiring under load,no codes?

[lazer]

I have a 2000 gt 2v with a kennebell blower.the car has 98,000 miles on it and has ran flawlessly for years . i had to replace the coil paks a couple years ago because it was cutting out under heavy load. it started doing it again but backfiring more and sputtering under moderate load,replaced coil paks with more expensive msd ones, but still no change. i'm boggled by the fact that its not throwing any codes? any ideas anybody. there arn't too many good shops that i trust in my area. thankyou.

 

[TBapp3]

Welcome abord! Try and introduce yourself in the new members section!

huh.....Def. weird!
I dont know what that could be....but....I can recommend you to a good shop in the area....Custom Automotive....If you de every come to needing to get work done to the car call theme up, ask to talk to Chad Loya(owner)... He is a down to earth guy who knows and loves stangs! Plus does great work at a decent price!

Here is a thread with all there info!

http://newyorkmustangs.com/forums/c...state-ny-shop-t16574.html?p=319624#post319624

 

[lazer]

Much appreciated tbapp3!

 

[TBapp3]

...Now maybe some one else here will be able to chime in on an opinion with the problem ...Cant wait to see the car....What size KB you got on there?!???

 

[03SONIC]

Have you pulled plugs to inspect them. Backfire could be a bad coil, a plug, or its dumping to much fuel. No codes suck but I would pull plugs for inspection.

 

[lazer]

yes Sonic, that's the first thing i did. probably should have mentioned that earlyer . new irridium plugs and coil paks. it made a difference but there is still an underlying issue. another hint is it seemed to happen all at once,one day she was pulling hard ,the next nasty backfiring under moderate load. If i go slow and steady it seems to pull hard up to a buck 40 or so, but i'm scared of cutting out over those speeds.when this mystery is figured out i'm throwin a party!lol anyway thanks for the response.

 

[irishpwr46]

sounds like a bad plug or injector. either you have a plug that shyt the bed, or an injector that is staying open too long

 

[lazer]

YES! Thanks Irishpwr46 that could very well be the gremlin! good looking.