I like pizza

ok when I am driving on the freeway or in a high gear, at about 4k rpms it boggs down andf then backfires. its a b16a in a civic hatch. what can this be?

Dr.Boost

OMG man, what are you using for fuel? It sounds like a very bad case of leaning the ---- out. Be careful. When it does ---- like that try not to keep doing it. Figure out what the problem is before you blow your motor up. Do you have ANY gauges? What is your EGT like if you have one?
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I like pizza

are you serious? leaning? ----! I wonder why it would be doing that? I have brand new spark plugs and wires and new car and rotor. si I dont think its a distributor problem.

you think my fuel pump could be bad? I have a new one but I have not put it in. I have rc440 injectors on the way, too.. how would I solve this one. keep in mind that I am not turbo yet. (as I turn my head and look at my pretty polished turbonetics t4/t3 and smile)

I am going to ref my car pretty soon so I cant put any of that in.

what do I do.

remember it

boooooooooooooooooooooooooooogggggggggsss KAPOOOOW

vroommmmmmmmmmmmmmmmmmmm

booooooooooooooooooooooooogggggggggggggggg kapowww

vrooommmmmmmmmmmmmmm

Dr.Boost

What EXACTLY do you have done to it? What is your timing set at? Any aftermarket parts on it right now?
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I like pizza

I/h/e/highflow cat/ vafc/msd wires/ngk plugs/goat on a wheel.

Dr.Boost

Ok, bust out with those AFC settings buddy. I knew you were holding out. :P
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I like pizza

man I dont really know how to work the thing, but I will try..

I like pizza

ok here they are...

throttle
lo 10%

hi 50%

ne-p:hvt

ne1: 4000
ne2: 4500
ne3: 5000
ne4: 5500
ne5: 6000
ne6: 7000
ne7: 8000
ne8: 9000

nepvt
ne1: 1000
ne2: 2000
ne3: 3000
ne4: 4000
ne5: 5000
ne6: 5500
ne7: 6000
ne8: 6500

hvt

40.. +2
45.. +2
50.. +2
60.. +3
70.. +4
80.. +4
90.. +5

hvt narrow

40.. +0
45.. +3
60.. +3
70.. +4
80.. +5
90.. +5

ok thats all of them.

but I am pretty sure its not the afc's fault, because it only hapens when I really push it hard. and drive it hard.

what do you think?

Dr.Boost

First off, change the throttle low/high to something more consistent. Try 98low/99high or at least make it 49low/50high. There is too big of a gap there.

Second, where does your motor redline? You need to change the ne settings to fit the rpm band that you use.

Third, what about the other setting? What are the sensor settings at?
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I like pizza

what other setting? and the sensors are right I am sure of it. I had a guy that works for honda tune my vafc. and its rpetty much tuned to the max with out dyno. I will try changing the throttle though. also,,what else could it be?
my friend told me that I may have jacked a spark plug up.