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[Coyoteluvr86]

I everyone I have a 2018 mustang gt with a procharger and fore twin fuel pump system and stainless power headers it make 800.
I took the car to get tuned and on my wayback the car kept on getting a check engine light and it’s po300 sometimes I get po3001 po3004 po3007. It’s always a different cylinder. Sometime noting at all and just a po300. I checked compression and they are all 200even cylinder.
Do the intake manifold cracked throw a code?? I’m just looking for ideas. That will keep me going through the process. I cleaned the fuel filter I checked thebattery terminals and voltag it’s good.
I noticed that the water pump pulley does not spin true it looks bent.
Thank you all reading and please input I won’t shoot anyone down

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[Unas2k5]

Have you checked the spark plugs? You got a new tune of went in for a tune up? Have you contacted the tuner ? Your car sounds a lot like mine. Setup is similar. Stock motor ?

 

[Coyoteluvr86]

The spark plug have less these a month and the electrode has a white coating. I’m on e-85. I have a new tune Tunner just tells me what to look at does not give a me a clear answer I don’t blame him. I also changed the upstream o2 sensor. I been reading Franck and cam and also timing sensor. But I get no codes.

 

[Coyoteluvr86]

I sent the injectors to get cleaned and they were 5 to 15 cc off. They made the flow like normal. I did the imrc lock out. Waiting to see if the will eliminate the po300.
Po300 turns on once and once cleared it won’t turn on but the code is permanent will a freeze game data Tell anyone anything.
once again thanks

 

[KingKona]

....Do the intake manifold cracked throw a code??

Yes. Exactly the codes you're getting.

 

[Coyoteluvr86]

I’m getting po300 and po316 once in q while I’ll get po3002. I’m e85

 

[Coyoteluvr86]

i been getting the po300 after I installed the fore fuel system and got it tuned. On the way home from a 2hour drive.sometime the car

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