#The notorious P0300/302/304 & P0400

[805DSM]

1st and foremost, yes i have searched and read other threads and have used alot of info from them and still nothing.


SPEC'S
1999 Spyder GST
STOCK 7Bolt & Cam/Crank Sensors ,Stock plastic ECU WITH BC272 int/exh cams.



Ok ive been dealing with this damn missfire for a while , its Usually a p0300 but there and there i get a cylinder 2 & 4 missfire. I've allready done a Compression check wich came out good at above 180+ all accross , changed transistor/coils/cam angle sensor/plugs/wires and still nothing . I also got a egr code p0400 and i've replaced the solenoid, checked all vaccum lines &egr and it still on . Would the cams or the egr malfunction have anything to do with the missfire? Or would it end up being the crank sensor, im also Running some RC injectors and ive read somewere that they end up going bad, any help will be appreciated .

 

[delta448]

Try this, put the GM MAS in draw-through and recirc your BOV, or try a known good stock MAS. I'm assuming all your tuning compensation has been done with the SAFC instead of the MAFT?

 

[805DSM]

Try this, put the GM MAS in draw-through and recirc your BOV, or try a known good stock MAS. I'm assuming all your tuning compensation has been done with the SAFC instead of the MAFT?

Yea , i have the maft zero'd out and all the tuning on the safc. Ok ill try that see if it works. Thanks

 

[805DSM]

I ended up installing the stock maf back and still gets the P0300, and p0400

 

[delta448]

What size are the injectors and what are your SAFC settings?
Were those cams degreed or just put in straight up?
Do you have a wideband?
Can you post a log?