ok. i just put long tube headers and HF cats on my 3.8. i removed and turned off the rear o2s the my sf4. it is backfiring at idleand when i shift. could the missing o2s cause this? also i seafoamed it the day i got it back. i was thinking maybe the computer was still adapting and the seafoam threw it a curveball. or the o2s. anythin else it might be? also it doesnt do it much when it is at OP temp. and is doing it less now.
need v6 long tube help.
Mr. Red Pony
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No biggy. cut off the exhaust infront of the rear cat. thats a good point to weld it to the longtubes. Or just go catless. I went with highflows
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we can't go catless around here
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Ah. then reuse the longer cat. that was my original plan but the internal of one just fell out so instead of catless i went with highflow. Basicly for better sound purposes. cats are basicly optional here. Hell our chief of police im my ******* town has an 07 f150 with straights and 40s
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haha nice where u from?
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good old emm boy. OKIE-LA-HOMA
ha
ha
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nice lol
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this is a good way of getting my posts up. lol way off topic. but have you been to merdal (sp?) beach. my GF used to go there as a kid.
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yeah its called myrtle beach lol in south carolina I was actually just talkin to a buddy about moving down to Greenville, SC
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Relocate the EGR? How exactly are you going to do that??
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Its not different. Every tuner I have talked to told me to use the tuner to delete the rear O2s. This is including the Diablo Tuners when I had my predator, and Justin at VMP tuning who has disabled my rear O2s through the tune. I'm not saying this to argue with you guys, but if you do have your fronts deleted it may be causing your engine to run either really rich or really lean which could cause damage. Just because its running doesn't mean it running right. Do and believe what yall want though, its your car.
My LTs came with an egr bung. I kept it for a while then deleted it later.
The poping while in neutral or between shifts is a timing issue which should and can be resolved with a correct tune.
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You know, Im really thinking hard about this... Maybe I did use the fronts? Putting everything together is making more sense to me now... And to top that off, I dont have cats, so why the hell would I need the rears ones anyway? I may have gotten my sensors backward.
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VAPs kit come with a little adapter that gets it just out of the way.
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MY SCT SF4 turns off the rears and only the rears, no option of the fronts.
The popping only happens now when its not at OP temp.
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Wow, just wow. This section is turning into a cesspool of misinformation. There really should be a rule that if you dont know what you are talking about 100% then you shouldnt speculate.
The reason your car still runs without front o2s because its still going to go off the MAF/ECU maps to keep your AFR decent. Also without your front o2s your car wont go into closed loop. Meaning it wont adjust AFR based on other sensors (maf, ect.) so it can only go off the maps.
If you car was running like crap with the front o2s is either because they were damaged, or your tune was off. It was some other reason, other than just your o2s being plugged in.
All your EGR does is recirculate emmision gasses to reburn it. Its just to cut down on emissions. MAC long tubes have a egr bung so you can keep your EGR system.
The reason your car still runs without front o2s because its still going to go off the MAF/ECU maps to keep your AFR decent. Also without your front o2s your car wont go into closed loop. Meaning it wont adjust AFR based on other sensors (maf, ect.) so it can only go off the maps.
If you car was running like crap with the front o2s is either because they were damaged, or your tune was off. It was some other reason, other than just your o2s being plugged in.
All your EGR does is recirculate emmision gasses to reburn it. Its just to cut down on emissions. MAC long tubes have a egr bung so you can keep your EGR system.
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You pretty much paraphrased for me...
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Okay then.
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Maybe thats why you have bad reps...
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this is right. you need to keep the front o2 sesnors but can delete the back ones
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No I have neg reps because ratards cant handle the truth.
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