P0300

[95clipsegst]

Ok i just got my car back running after sitting up for 7months. Ok When i start my car, it almost dies(well does sometimes) Its misfiring real bad and giving me a p0300 code. I changed the plugs with the NGK7's and regaped them to .28 then put new MSD 8.5mm wires, still didnt help. I have ran two tanks of gas through it with fuel system treatment in it. Still same crap. I went to change the fuel filter today but can get the darn banjop bolt off the top(soaked the hell out of it).
Ok what are some other options.
Oh yea, i thought i was hearing a sparking sound under the hood but i found that it was the pcv checkvalve rattling(the ballbearing inside it) so i changed it and it still does it, mabe its just with it idleing bad its making it do that. Dont remeber hearing it before my car went down.

 

[ddavisaf]

P0300..... Multiple cylinder misfiring detected

Update your vehicle profile with your mods.

What is your idle at? What's your vacuum at? Are you running rich?

 

[weith1111]

Wires not on in the right order? Shot in the dark, but easy to check

 

[95clipsegst]

sorry
95 GST
5 Speed
Cone Open airfilter
Custom 3" Turbo Intake
UICP/LICP
1g BOV
JoeP MBC @ 14psi
2.5 Turbo back
16g
550cc injectors
S-AFCII
PocketLogger

after it warms up it idles at about 1K on the pocket loger iit is reading STFT1 1to-1 and LTFT1 0 the AFC is set to +3 at 1k which seems odd from what it use to be before the car went down. the acuum is about 10-12. The car sounds like it has a huge cam in it

 

[95clipsegst]

Wires not on in the right order? Shot in the dark, but easy to check

nope checked that first, and double checked them

 

[ddavisaf]

You need to do a boost leak test.

 

[95clipsegst]

would leaks at the turbo intake pipe cause this? i just found that my custom HOME DEPOT intake pipe has a prob . one of the hoses that run to the back of the motor(well the hose barb that the hose goes onto) was dry rotten and not sitting sealed in the hole. also the BOV dump tube was roted and not sealing

 

[ddavisaf]

Yes. That's why you only have 12 hg vacuum when you should be near 19.

 

[95clipsegst]

DOH!! well im in the process of p[utting my stock one back on so i'll let ya know what happens.

 

[95clipsegst]

ok well put the old one back on, but still about the same vac, its ideling better but still about12-14vac. ill have to try and get me a air tank and check for leaks,