Cracked manifold?

TJJETER87

MEMBER
2017 DODGE JOURNEY
6 CYL
4WD
AUTOMATIC
127,300 MILES

Okay, so I had a misfire on cylinder 2, changed the spark plugs, cleared the code, popped back on same error, changed out the coil packs, cleared coded, popped back on, had someone do the fuel injectors today the one near cylinder 2 was blue instead of orange. He started it back up, check engine light is blinking now, wasn’t before. I now have several codes. After further inspection the intake manifold is cracked and one of the bolts won’t go completely down, it’s stripped. Drove it up the street there’s a lot of noise sounds like air, horrible vibration at idle or while accelerating. I know the manifold has to be airtight to I know to replace that. But how did a cylinder 2 misfire turn into all of these other codes? Also, about that injector 1 circuit, there’s no power getting to that injector, but it had power before changing it. Please advise me on the next steps.

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Friday, April 25th, 2025 AT 12:10 PM

1 Reply

JACOBANDNICKOLAS

MECHANIC
110,176 POSTS

Hi,

These codes, for the most part, tie together. As far as it running worse, it sounds like we have a worse vacuum leak as a result of not being able to bolt it down properly, and the crack you indicated.

What I recommend first is to eliminate the leak. Remove the intake and replace it if needed. Also, which bolt is stripped? Is it one that bolts to the engine? Are you able to get it removed? If so, see if the threads are damaged where they enter. If they are, either try a clean-out tap, or you may have to retap the location. If the threads are totally damaged and too large to rethread, check into a Helicoil for repair.

The codes indicate an open circuit on the injectors. Either one of the connectors is disconnected, damaged, or a wire to it is broken.

If you look below, I attached a pic of the wiring to the injectors. Each injector will have a brown wire with a white tracer. That is the power. Recheck to see if there is power to all or some of the injectors. If there is, we need to confirm a ground path to the opposite wire at the injectors.

To do this, take a test light and attach the alligator clip to the positive side of the battery. Probe the ground source one at a time while someone cranks the engine. If there is a ground path, the test light should strobe on and off.

Try this and let us know what you find. Note: The vacuum leak needs to be addressed first. Once that is fixed, you should lose the multiple cylinder misfires, and it should only indicate the one causing the miss. Also, if the CEL is flashing, I don't recommend running the engine more than needed. It could damage the catalytic converter.

Let us know.

Take care,

Joe

See pic below.

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