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Weird RB25DET engine issue

Celticsfan03
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Celticsfan03 Rookie

Celticsfan03

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Hey all, hoping for some advice on what’s going on with my GTST. I recently noticed that I was leaking antifreeze from a small hose behind the motor. So I had replaced the hose and filled the antifreeze back up but now for some reason when I’m driving the car I can feel the engine kinda breaking up around 4K rpms. I also feel the cars rpms fluctuating while I’m just cruising on the highway. I thought it might’ve been because I had the a/c running but I shut it off and it still does it. Can anyone give me some technical help with what’s going on?

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https://www.sau.com.au/forums/topic/485722-weird-rb25det-engine-issue/
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GTSBoy Grand Master

GTSBoy

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Hmm. If it was S1, I would have suggested that you might have upset the coil igniter by working at that end of the engine.

As is it, I would suggest that you might have upset the coil loom. You might have tired old wiring connectors that got moved. Not particularly likely though.

Celticsfan03 Rookie

Celticsfan03

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5 hours ago, GTSBoy said:

Hmm. If it was S1, I would have suggested that you might have upset the coil igniter by working at that end of the engine.

As is it, I would suggest that you might have upset the coil loom. You might have tired old wiring connectors that got moved. Not particularly likely though.

I have new spark plugs, splitfire coil packs, and a new coil pack loom

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