r34 gtr need some help (megasquirt)

Discuss topics related to the CA18DE and CA18DET series engines.
beans33
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Joined: Mon Jan 10, 2005 5:51 pm
Car: 1993 ca18det 240sx

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Hey man I need to ask a few questions about megasquirt tuning. If you want I can call you or if you want to do it on here thats fine. Just let me know. thanks


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The_Chosen_One
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what do you need help with. Im the one who guided that cracka.

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float_6969
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I was gonna say, Tim doesn't know ****. He's just an inbred redneck.

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r34 gtr
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Come on, that was below the belt. My family is from England just for the record. I dont know crap about megatune though, T_C_O is your man for sure.

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float_6969
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But I thought I was your man Tim?!?!?

beans33
Posts: 908
Joined: Mon Jan 10, 2005 5:51 pm
Car: 1993 ca18det 240sx

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Well TCO, ive got it to idle but its running extremely rich, like tim said Im not the best with megatune. It runs real rich when its on the 4 squirts, but when on 2 squirts it idles much better. I guess if you can direct me on how to just get it driveable i guess. thanks

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The_Chosen_One
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What code are you running? Give me a run down on your setup?

What do you mean 4 squirts? Are you saying its spraying 4 times in the same cylinder?

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r34 gtr
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Joined: Sun Dec 29, 2002 9:33 am
Car: 98 Nissan Frontier XE 4x4
95.5 Audi URS6 Avant 5spd
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89 Nissan 240SX base CA18DET
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You are my man baby, but no one else's. I just wanted to make that clear.

beans33
Posts: 908
Joined: Mon Jan 10, 2005 5:51 pm
Car: 1993 ca18det 240sx

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Hey im using 2.8. my setup is turbonetics t3/t04e evo 560 inj. fmic with plx m-300 wideband.

when I put the injections per engine cylcle on 2 it idles much better, but when on 4 it idles worse and runs more rich. Any help is appreciated. thanks

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The_Chosen_One
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obviously dont put it on 4 that setting is for a completly different motor. 2 squirts are for your average 4 stroke internal combustion engine. 2 squirts is what refered to as batch and wasted spark.

Think of this way on batch fire injectors spray into cylinder 1 and 4 at the same time. Cylinder 1 is during intake stroke while cyliner 4 is on exhaust stroke. So the fuel in exhaust stroke gets burned up from the heat and from spark because of wasted spark setup and exits the exhaust.

When you set it to 4 squirts your practically creating a puddle on the intake valve because the valve is closed thus why its running like crap and rich.

beans33
Posts: 908
Joined: Mon Jan 10, 2005 5:51 pm
Car: 1993 ca18det 240sx

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Also Im having a problem with throttle tip. the engine bogs down when i quickly rev the motor. If I ease in the throttle it revs just fine. The reason we tried it on the 4 squirts per engine cycle is we read that it might help with the throttle response, but i guess not. Any other help is appreciated to get this thing on the road. Any advice on the VE tables would be helpful. thanks again

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The_Chosen_One
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check your tps settings, and check your accel enrichment u may have a problem their.

As for VE table just input the motors specs and injector size. MS will create a map than you tune your VE tables. Make sure it idles good and use a wideband to adjust ur fuel maps across the rpm range.


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