MX-5 NC with RX-8 231 Engine

Paul_13 · March 23, 2019, 06:11:53 PM

Quote from: boosted on March 17, 2019, 08:24:57 PM
Hi mate, pls fit a temp fuel pressure gauge. Youll be able to determine if you have genuine fault or not...
Test not guess, i was in the exact same scenario as you hence a boneyard of fuel pump bits and pieces...
The rx8 pcm would throw a code if lean running im sure. Id be tempted to try a maf sensor too.

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Haven't got round to it yet but will do.
I keep getting a misfire at 4.5k annoyingly

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Paul_13 · March 24, 2019, 04:17:26 PM

Quote from: boosted on March 03, 2019, 02:40:56 PM
Or loop the resistor....no more low n high power..i did that from beginning saving weight....

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How did you "loop" the resistor?

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boosted · March 24, 2019, 04:21:39 PM

Get the resistor...cut the plug off in the middle of the wires...join the 2 wire ends ..no more resistor dropping voltage. Plug back in.
The fuel pump relays will still swap but there not changing voltage.

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boosted · March 24, 2019, 04:21:59 PM

Get the resistor...cut the plug off in the middle of the wires...join the 2 wire ends ..no more resistor dropping voltage. Plug back in.
The fuel pump relays will still swap but there not changing voltage.

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Paul_13 · March 24, 2019, 04:23:27 PM

Quote from: boosted on March 24, 2019, 04:21:39 PM
Get the resistor...cut the plug off in the middle of the wires...join the 2 wire ends ..no more resistor dropping voltage. Plug back in.
The fuel pump relays will still swap but there not changing voltage.

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Thanks.

Had a weird symptom earlier where it felt sluggish and then felt like a turbo kicked in.
I think the resistor Is pooped and not swapping to high power.

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boosted · March 24, 2019, 04:25:15 PM

Its a quick thing to try, or again youve got port opening issues....

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boosted · March 24, 2019, 04:25:27 PM

Its a quick thing to try, or again youve got port opening issues....

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boosted · March 24, 2019, 04:25:57 PM

Blimin phone..

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boosted · March 24, 2019, 04:27:27 PM

Echo in here today...

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Paul_13 · March 24, 2019, 05:05:51 PM

Might be the problem!

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Paul_13 · March 24, 2019, 05:15:17 PM

Fuel pump sounds very eager now

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Paul_13 · March 24, 2019, 05:56:59 PM

Strangely I'm getting different STFT readings in 2nd gear compared to 3rd.
No STFT in 2nd gear and - 7.81 in 3rd

Just to note this is from earlier today before resistor delete

boosted · March 24, 2019, 05:57:22 PM

Its outta spec..what was reading 1.0 ohm?

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Paul_13 · March 24, 2019, 05:58:13 PM

Quote from: boosted on March 24, 2019, 05:57:22 PM
Its outta spec..what was reading 1.0 ohm?

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The resistor! It was out of shot of the camera

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Paul_13 · March 25, 2019, 02:04:05 PM

Well done changing the HT leads and deleted the fuel pump resistor the mis fire has got sooo much worse. I'm going to change the plugs as well. But I think there's an issue with the high load electrical circuit

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