Evo8life

Hello guys as mentioned in the title i have a weird cut or bug or whatever it is called while stepping on gas pedal at low rpm happens for a second then everything goes back to normal.plus it happens once a week maybe the only code i have is idle speed control which i think is related to my boomba aftermarket throttle body or can it be something else?the car pulls like a rocket so no boost leak
Any help please

4g63Moon

iTrader: (9)

Sounds like it could be the tune, might be a little lean on the power rpm range and the tuner might need to add some fuel on the lower load/rpm where its "bogging"

4b11slayer

Since you mentioned the boomba is that a recent mod?

Evo8life

car was running fine for 1.5 months now it misfires everytime i go wot it cuts the problem developped into a misfire when hitting boost bought new spark plug wire but that ddidnt fix the problem my afr at idle are 14.7-15.2 which is nornal now no more boost without misfire

Evo8life

no new mods the cut became a misfire 4 days ago now when i hit boost the car misfire badly or cuts fuel dont know what its called

4b11slayer

Remove and post pics of spark plugs

Evo8life

This is one of the plugs they do all look the same

4b11slayer

Guessing your on e85? I would try new plugs. Sounds like spark blow out. Gapped at 21 if e85. If your on 91 go back to a bpr7es

Evo8life

well no im on 98 Ron do these plugs look bad?

4b11slayer

Oh ok. No they dont look bad but they are like $2.50 each. Good place to start

Evo8life

they sell for 80$ here in my country we have stealerships everywhere can a bad walbro or boost leak cause such a cut when going wot only?

4b11slayer

It could be a boost leak. But it would usually idle like crap also. Do you have s wideband?

Evo8life

yes my afr idles between14.7 15.3 and every one minutes makes a drop in a second to 13 then jumps to 16.it happens in a split of a second

DatEngnr_Bro

Are you on speed density?
I had this problem recently. Except mine would happen under higher loads.
Turned out one of my plugs had a cracked insulator & they were gaped wrong.

My tuner looked at it and it was also a bit too rich under higher loads, so that probably didn't help.
I think it was killing/blowing out the spark.

RightSaid fred

You need to list your mods.
Looks like another fuel pressure problem.
The ceramics aren't supposed to be that colour.
Are you running on leaded fuel?


The plugs are the wrong ones,

http://evoscan.com/technical-vehicle...ark-plug-codes