vtec doesnt pull, just hits and doesnt go....
09-27-2009, 07:41 PM
#1
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vtec doesnt pull, just hits and doesnt go....
i have a poor man type r i just got done rebuilding and i have a chipped ecu,
but when vtec hits its a smooth cross over, but doesnt pull like its spouse to. ive been told i need a tune b.c i have stg2 cams and that im not getting correct fuel sent out?
it does pull good from 1000rpm-5600rpm, then vtec just studdards and acts retarded...idk maybe yall do
btw no check engine. and i clean out the vtec solenoid
thanks
but when vtec hits its a smooth cross over, but doesnt pull like its spouse to. ive been told i need a tune b.c i have stg2 cams and that im not getting correct fuel sent out?
it does pull good from 1000rpm-5600rpm, then vtec just studdards and acts retarded...idk maybe yall do
btw no check engine. and i clean out the vtec solenoid
thanks
Last edited by therealone; 09-27-2009 at 07:43 PM.
09-27-2009, 08:06 PM
#2
やくざに成りたい
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Re: vtec doesnt pull, just hits and doesnt go....
May be a dumb question, but is this your first time driving a car with vtec? Its not like hitting nos or anything you know...
just stating the obvious first, dont kill me haha
just stating the obvious first, dont kill me haha
09-28-2009, 04:35 AM
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09-28-2009, 01:56 PM
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Re: vtec doesnt pull, just hits and doesnt go....
If you have a chipped ECU, the VTEC crossover RPM might be lower than stock, which will tend to make VTEC engage without as much drama. That isn't a bad thing. Stock VTEC engagement is fairly high RPM so it won't engage under normal conditions unless you purposely get up into that RPM range. What that means though is that the power drops off on the non-VTEC set of cam lobes, and then picks back up when the more aggressive VTEC cam lobes engage. Anyway, if you lower the engagement RPM, the non-VTEC power won't fall off as much before VTEC engages, so the transition doesn't feel as big. If VTEC engagement is set from low cam and high cam dyno graphs, it's possible to set it so that it's barely even perceptible.
That may have nothing at all to do with your problem, but it's a possible explanation if you already have a chipped ECU and don't know what the program modifications are.
That may have nothing at all to do with your problem, but it's a possible explanation if you already have a chipped ECU and don't know what the program modifications are.
09-28-2009, 03:19 PM
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RiverCitySyn
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Re: vtec doesnt pull, just hits and doesnt go....
If you have a chipped ECU, the VTEC crossover RPM might be lower than stock, which will tend to make VTEC engage without as much drama. That isn't a bad thing. Stock VTEC engagement is fairly high RPM so it won't engage under normal conditions unless you purposely get up into that RPM range. What that means though is that the power drops off on the non-VTEC set of cam lobes, and then picks back up when the more aggressive VTEC cam lobes engage. Anyway, if you lower the engagement RPM, the non-VTEC power won't fall off as much before VTEC engages, so the transition doesn't feel as big. If VTEC engagement is set from low cam and high cam dyno graphs, it's possible to set it so that it's barely even perceptible.
That may have nothing at all to do with your problem, but it's a possible explanation if you already have a chipped ECU and don't know what the program modifications are.
That may have nothing at all to do with your problem, but it's a possible explanation if you already have a chipped ECU and don't know what the program modifications are.
09-28-2009, 05:49 PM
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Re: vtec doesnt pull, just hits and doesnt go....
thanks Fabrik8 for your posts and knowledge about hondas is bery niceee... and much appreciated
any recomindations on injectors i can use with out a resistor box? i was thinking maybe like some type-s injectors?
09-28-2009, 05:54 PM
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Slappin Curtis
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Re: vtec doesnt pull, just hits and doesnt go....
[QUOTE=Fabrik8;5677348]If VTEC engagement is set from low cam and high cam dyno graphs, it's possible to set it so that it's barely even perceptible.
[QUOTE]
Which is how it should be, on a properly tuned car it is barely even heard or felt if at all.
[QUOTE]
Which is how it should be, on a properly tuned car it is barely even heard or felt if at all.
09-28-2009, 05:55 PM
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Re: vtec doesnt pull, just hits and doesnt go....
What injectors are you using now; you're apparently not using 1992+ Honda injectors if you're using a resistor box...? That begs the question of why you're not using stock Honda injectors if you have a naturally aspirated engine with some slightly more aggressive cams..? You should have plenty of flow for that setup I'd imagine.
Last edited by Fabrik8; 09-28-2009 at 05:57 PM.