Need help check engine light BOOSTED

[stang305]

Need help I’m 2015 mustang gt with 10k miles procharged with everything else stock engine wise.

I received these codes while WOT

Ive been boosted for 5k miles no issues

P0300 (random/multiple cylinder misfire detected)

p115e (throttle actuator control throttle body air flow trim at max limit)

have you had this before ?

did my stock intake manifold take a crap?

Any info I would appreciate thank you

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[Old Ickabod]

Need help I’m 2015 mustang gt with 10k miles procharged with everything else stock engine wise.

I received these codes while WOT

Ive been boosted for 5k miles no issues

P0300 (random/multiple cylinder misfire detected)

p115e (throttle actuator control throttle body air flow trim at max limit)

have you had this before ?

did my stock intake manifold take a crap?

Any info I would appreciate thank you

Shortly after I first got my 2015 (used, with a prochager stage 1), it began throwing the P0300 and other individual cylinder misfire codes - never had the P115E though. Mine ended up having a bad head gasket. A cooling system pressurization test is an easy way to confirm.

Its unlikely that your intake manifold failed at only 9lbs of boost........

Hopefully, another forum member has had experience with the P115E code and will chime in.

Good luck.

 

[kent0464]

Do some tests: Fuel pressure, Leak down and compression tests, and also a smoke test. Asking on here will give you ideas but without testing you won’t know.

 

[stang305]

I

Shortly after I first got my 2015 (used, with a prochager stage 1), it began throwing the P0300 and other individual cylinder misfire codes - never had the P115E though. Mine ended up having a bad head gasket. A cooling system pressurization test is an easy way to confirm.

Its unlikely that your intake manifold failed at only 9lbs of boost........

Hopefully, another forum member has had experience with the P115E code and will chime in.

Good luck.

before having these codes

I also had p0301 and p0306 if that helps

 

[Old Ickabod]

I

before having these codes

I also had p0301 and p0306 if that helps

Yep, those are individual misfire codes......other indicators (of a bad head gasket) are white exhaust smoke at start up and sweet smelling exhaust, but these may not be immediately noticeable. I would try the cooling system pressurization test to see if coolant is leaking into the cylinders. If the pressurization test turns out ok, continue to test the other systems as kent0464 suggested.

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