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97 gst bogs high rpm

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mikey1990

Probationary Member
14
0
Oct 19, 2012
brewcity, Wisconsin
i have a 97 gst fully built just got it tune ran perfectly fine on the dyno it bogs at high rpm when i had it on the dyno it did not cut or bog was tune perfectly fine at 11-11.4 AFR but when i took it off the dyno took it for a spin it bogs high rpm for some reason i have 255 walbro pump on 850cc injectors tune on dsmlink also 1 thing that im curious is cyliners 4-2 are dry and cylinders 3-1 are wet with gas like it wasnt all burned off i think my coil might go going bad as i never had them changed when i bought the car so can the lack of spark high rpm cause the bog?
 
Do you have an afpr? What are your plugs gapped at? Your vehicle info isn't filled in, or at least not showing up on my phone, so I can't be much more specific, but that's where I would start. Start with the basics and narrow down, then let us know what you come up with.
 
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Yes I have afpr and the spark plugs never checked the gap but the turner said they were gapped correctly so he didn't gap them but I will dry with the ignition coils first as my spark plugs are new and wires were new
 
ok it isnt the coil 2 cylinder still wet and 2 cylinder still dry i also took out my injectors and found that the 2 of my injectors that gives fuel to the 2 cylinder that are wet had black gunky stuff in them and the other 2 were clean i dont know why they are dirty but i run E85 on my car here is a log of acouple of runs i did the car will only bog alittle high rpm around 6-7k and will only bog in 3rd gear in 4th gear goes smoothly but here is a log i did i also took the spark plug to look at and than putting them back in went for another run and it didnt bog so im thinking it has somthing to do with either the wires or the spark plug but i am lost atm
 

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