p0300,2 rear cyl's flooding

[mylt1]

i have a 01 gmc jimmy 4.3 that started missing, did a tune up with plugs and wires. that didnt fix the problem now the computer keeps showing p0300 took it to a friends shop, he ran it on the computer same thing p0300. he started tracking it down come to find out the rear 2 cyl's are flooding up fouling the plugs and causing the code. what can i do to fix this?

[Mr. Smith]

i have a 01 gmc jimmy 4.3 that started missing, did a tune up with plugs and wires. that didnt fix the problem now the computer keeps showing p0300 took it to a friends shop, he ran it on the computer same thing p0300. he started tracking it down come to find out the rear 2 cyl's are flooding up fouling the plugs and causing the code. what can i do to fix this?

 

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Check the injectors

[GM-Tech]

Possible fuel pressure regulator leaking?

[mylt1]

Possible fuel pressure regulator leaking?

 

<{POST_SNAPBACK}>

 

 

where would it be leaking? no leaks in the engine compartment. i just thought it was weird that the two rear injectors could have gone bad at the same time.

[GM-Tech]

where would it be leaking? no leaks in the engine compartment. i just thought it was weird that the two rear injectors could have gone bad at the same time.

 

It leaks inside the plenum, since that's where it's located. And since it's towards the back of the plenum, it affects the rear cylinders the most.