I have a NA LS/VTEC
My problem is that VTEC engages then turns off. then it has hesitation in the top half of the power band. IE 5500-9000.


I unhooked my VAFC
I checked the solenoid and the screen
The pressure @ the solenoid
I checked a variety of ECU's
The dist. (the cap, rotor,etc)
The plugs, and wires
Everything works and the pressure is there


Below where ever VTEC is set at it, it pulls strong,
when it's suppose to crossover, (anywhere it's set) it goes in then out.... finally coming on with a big power loss and hesitation Like a stutter around 7500-8500


It ran fine then out of no where this BS happens

Nothing seems to work
Any help would be greatly appreciated

 

OIL

 

yeah mine did just that, drain and refill.
joe

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Scribes &raquo;</TD></TR><TR><TD CLASS="quote">OIL</TD></TR></TABLE>

Yep! I had this happen once, I was like WTF is going on. Changed my oil the next day for routine change and voila all better.

 

I have a 94 Ex with a JDM B18C and I don't get any kick with my VTEC. You can somewhat hear it at 5500, but there is no pull to go with it. I have changed oil, taken the solenoid apart and cleaned screens... do anyone have any other ideas?

 

5500? Wouldn't that be the RPM the butterflies open.. GSR crossover is 4400.

 

If it's 4400 then something is way wrong. I ran 16.2 at just over 85 mph at the track. I could not feel or hear anything close to what I have in other dohc vtec cars. Do you have any ideas about what could be wrong?

 

what trans are you useing? 16.2 for a b18c in a coupe is slowwwwwww.

even if vt2c was opening at all, you should be running 15's

 

I have a civic si trans

 

i think vtec crosses at 4400rpm, factory set, and the secondary manifold butterflys open at 5700.

I have an apex-i N1 exhaust, and can definatly hear when vtec crossesover, feels like a slight gain in power, but when the secondarys open is where i feel the most pull.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Scribes &raquo;</TD></TR><TR><TD CLASS="quote">i think vtec crosses at 4400rpm, factory set, and the secondary manifold butterflys open at 5700.

I have an apex-i N1 exhaust, and can definatly hear when vtec crossesover, feels like a slight gain in power, but when the secondarys open is where i feel the most pull.</TD></TR></TABLE>

this is correct

 

I have a type R header and Apexi World Sport exhaust and I got nothin...

 

what ecu are you running, and do you have any vtec units? such as Vafc vtec controller?

 

I run the JDM GSR ECU, I don't have a VTEC controller yet, but I think I'm gonna get one next week

 

is there anything else that would cause vtec not to work?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94RedEGCoupe &raquo;</TD></TR><TR><TD CLASS="quote">I run the JDM GSR ECU, I don't have a VTEC controller yet, but I think I'm gonna get one next week</TD></TR></TABLE>

pull the ecu and look to see what # is on it to me 100% sure it is a gsr ecu. a few people have put a ecu in that wasnt vtec enabled and couldnt figure otu why vtec wouldnt open.