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RB30 Struggles from idle

aimre

By aimre,
in Engines & Forced Induction

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aimre Newbie

aimre

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Car is struggling to rev from idle when you accelerate normally to spirited, But it will get past 1000ish rpm if you feather it, and then is fine so long as the revs don’t drop again. Idles fine. Plugs come out wet as after a few min. 

Things changed are:
CAS, ARM and fuel reg from a engine that was confirmed working 2 years ago

Injectors have been reconditioned 

ECU has no codes

Where to from here?

Video of the issue can be seen here

 

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https://www.sau.com.au/forums/topic/485909-rb30-struggles-from-idle/
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aimre Newbie

aimre

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On 1/11/2024 at 5:25 PM, MBS206 said:

Sounds like AFM or TPS issue.

What are the voltages at the TPS like?

Have you done any diagnostics other than slapping parts at it?

Checked for codes on the standard ecu. But not much else. What’s the procedure for TPS voltages? What else should I be trying to diagnose?

 

cheers

MBS206 Grand Master

MBS206

Posted
Posted
On 11/6/2024 at 10:33 PM, aimre said:

Checked for codes on the standard ecu. But not much else. What’s the procedure for TPS voltages? What else should I be trying to diagnose?

 

cheers

Start with a multimeter, and see if you're getting power at the TPS. There should be a manual for your car somewhere on these forums and it'll have the info for what closed TPS signal voltage is, and how it should sweep to full throttle.

Same as for other sensors / valves.

 

Have you checked things like your base timing etc? See if anything looks amiss there too?

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