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Enjoying life
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Discussion Starter #1
Trying to locate the reason for my car being about 10% down on power so I took the plugs out. They are fairly white which indicates the engine running too hot or too lean. Is it worth me changing to a different heat range?
Anything else I could investigate if it's running too hot?
 

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Administrator
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Does your car output fuel trims via the obd port?

You may have a slight vacuum leak somewhere in the inlet, hoses?

Is your fuel system operating okay?

Perform an injector flow test?
 

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Enjoying life
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8,559 Posts
Discussion Starter #3
I'm going to have to Google some of that Farqs :D
Funnily enough the hose that runs from the iacv to the inlet manifold was a little easy to remove. I put a small hose clip on it, did an ECU relearn and put a velocity stack on, the car really pulled well this morning. The car could have been running lean prior to my remap, that's something I should consider. Might look up the injector test, mine sound noisy.
 

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Hehe, fuel trims and logging can be a useful diagnostic tool to narrow down likely causes.

A vacuum leak is probably the most likely, are the injector seals okay?

Then injector flow and leak back tests would be helpful.
 
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