ok i have a 96 accord with a h-22 swap and my v-tec was kicking on at 2500 rpms. what would cause this maybe the solenoid? our maybe my computer?


Modified by jeffruby at 4:25 PM 6/24/2007

 

no disrespect but if your vtec is engaging what is your boggle?

 

oh my bad i mean it was kicking on @ 2500 rpm so i unplugged it

 

not really understanding the question. so you unplugged it and it's still kicking in? i thought vtec is supposed to kick in around 2500+ rpms.

 

has it always kicked in so low. Why would you unplug it ?? And if your saying that it is still cutting on after you unplugged it. then I dont think were talking about a vtec problem here.

Vtec should cut on around 4-4500 Rpms,

I have seen a few Honda's with chipped ecu's that the vtec cuts on thats low. and no rev limiter, ect. I dont see a point in cutting the vtec on that low. Even 3500 is to low.

When you ask a question add a little bit more detail so everyone can understand you .

 

wat ecu you did you use may I ask? Did you stay with the p0a ecu if so that might be the reason why so early. For a single 2800 is not early

 

OEM poa ecu for an accord is 4000 on the vtec . 2800 is way to low. I had a poa-A51 and it kicked at 4k

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jeffruby &raquo;</TD></TR><TR><TD CLASS="quote">ok i have a 96 accord with a h-22 swap and my v-tec was kicking on. what would cause this maybe the solenoid? our maybe my computer? </TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">7. BE SPECIFIC: Make titles for threads, and questions clear and to the point! Just like this one. Include all the necessary info like year and model/engine
Non-Compliance: Vague titles, general questions</TD></TR></TABLE>

So...whats your question???

 

ok so ill start again its a 96 acord 5 spd it has a h-22 vtec the computer is a poa the vtec was kicking on @ 2500rpm and @ 4k tha power would fall off and @ 4500 it would cut out till 5k and run strong til about 6750 or so so i unplugged the vtec it now revs smooth all the thru but the power starts to fall of @ around 4500 or so were the vtec should kick on sorry for all of the confusion i put all of this in the original post but some how i erased it.

 

Ecu must b dead mate or your using the wrong Ecu not sure about wat it... Sohc Vtec f22b have Vtec point at 2500 u need to get a h22a manual ECu soo it wil kick in at 4900 or u can use a Vtec controller to set the Vtec point higher but then your red line will b short as sohc Vtec has redline of 6600rpm and h22a has 7600 .... how easy is the swap im looking to do the same too my Wagon

 

i figured that was what the problem was can i just pick up a controller and run it that way until i get the ecu i need??

 

You need to run a P13 ECU provided that you just have a stock/bascially modified H22A.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by db8SI &raquo;</TD></TR><TR><TD CLASS="quote"> your using the wrong Ecu not sure about wat it... Sohc Vtec f22b have Vtec point at 2500 u need to get a h22a manual ECu soo it wil kick in at 4900 or u can use a Vtec controller to set the Vtec point higher but then your red line will b short as sohc Vtec has redline of 6600rpm and h22a has 7600 .... how easy is the swap im looking to do the same too my Wagon </TD></TR></TABLE>

thank you

 

NO VTEC CUTS ON AT 2500 rpm unless the ecu has been chipped. The f22b1 sohc vtec kicks in at 4k . Where the hell are yall getting 2500 . Thats so low you wouldnt even notice the vtec at operation.

The vtec works on oil pressure. At 2500 the oil pressure is not enough to make a difference on the vtec. So in 5th gear at 75-80 mph your riding with the vtec on . Wasting fuel . Hmmmmm

You need another ecu . Get a p28 or a p13 .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fastazzf22 &raquo;</TD></TR><TR><TD CLASS="quote">NO VTEC CUTS ON AT 2500 rpm unless the ecu has been chipped. The f22b1 sohc vtec kicks in at 4k . Where the hell are yall getting 2500 . Thats so low you wouldnt even notice the vtec at operation.

The vtec works on oil pressure. At 2500 the oil pressure is not enough to make a difference on the vtec. So in 5th gear at 75-80 mph your riding with the vtec on . Wasting fuel . Hmmmmm

You need another ecu . Get a p28 or a p13 . </TD></TR></TABLE>

Well ACTUALLY vtec engages at 2300+ rpms on my f23a1 and several other honda engines.... The OP looks like he needs a new ecu, maybe it wasnt swapped with the engine?

 

NO vtec cuts on that early from the factory ..... I dont care what Honda it is. You might think it does. But there is no way factory is kicking vtec that early .... NO WAY !!!!!! What the hell is the point of vtec cutting on that early......

 

Depending on the engine, VTEC can cut in earlier. For example, here is the technical info. for a F22B1 engine from the manual:

A variable valve timing and lift mechanism (i.e., VTEC) is used so the engine achieves both low fuel consumption and high output.

The control system for this mechanism, constantly monitors the changes in engine status such as load, rpm, and vehicle speed. This information is transmitted to the Engine Control Module (ECM).

Valve Timing Change Conditions
Engine Speed: 2,300 - 3,200 rpm (depending on manifold pressure)
Vehicle Speed: 6.2 mph (10 km/h) or faster
Engine Coolant Temperature: 50 degrees F (10 degrees C) or higher
Engine Load: Judged by intake manifold negative pressure

 

ok let me correct myself ..... If you switch cams . Depending on the cam that was swapped. The vtec could kick in lower than factory.

Thats all true tech8. And vtec isnt needed in the lower rpms because the F22b1 are torque built motors. So the computer doesnt kick it until mid - high range rpms.

When the vtec is in operation, fuel boost and timing is advanced. Upon 15% throttle.

edit: Sorry, not trying to jack your thread !!! Most likely you need another ecu .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fastazzf22 &raquo;</TD></TR><TR><TD CLASS="quote">ok let me correct myself ..... If you switch cams . Depending on the cam that was swapped. The vtec could kick in lower than factory.
</TD></TR></TABLE>

I don't know how else we can word this for you to understand... vtec can kick in as low as 2300 rpms on a factory honda motor, this is present on many many hondas. No modifications, no aftermarket cams, no computer swaps/mods, no camshaft replacements... as is from the factory many cars come with vtec that engages at 2300+ rpms.

 

p13 should fix your problem

 

what does the p13 come in and the p28 omes in a civic 95-95 ex,si correct??

 

A p13 ecu comes in a prelude ...

 

What type of cam shaft did the tec come with.. Stage 1 or stage 2

 

stock cams man! as far as i know neways.

 

do you plan on giving us any more information on your car? What computer is in it right now? Was the engine modified? details man!!!!!!11ONE!!!!