b16a in a crx and vtec wont come in first gear until 7200 rpms... rest of the gears its fine.. ve a pr3 ecu.. and the motor is bone stock....
things checked..

1. oil pressure is good
2. vtec solenoid good
3. wiring - 3x checked
4. compression 180 approx in all fours
5. vss is good
6. tried another pr3.. still the same

any help wud be much appreciated..

thanks

 

bumpppp!!!!!!!!!!
tttttttttt

 

I believe there's a VTEC speed governor in the ECU... at least there is for OBDI. Won't turn on below a certain MPH.

 

It doesnt come on til 20mph in some cases, but you are already going over 20 at 7200 in first gear???? I dont know thats weird

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raene &raquo;</TD></TR><TR><TD CLASS="quote">I believe there's a VTEC speed governor in the ECU... at least there is for OBDI. Won't turn on below a certain MPH. </TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboCoop &raquo;</TD></TR><TR><TD CLASS="quote">It doesnt come on til 20mph in some cases, but you are already going over 20 at 7200 in first gear???? I dont know thats weird </TD></TR></TABLE>
depends on your tire size. if your tires are smaller than stock on that car or possibly if you're using the wrong VSS it may be seeing the wrong speed.

 

why do you want to hit Vtec in first gear anyway?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95lstegman &raquo;</TD></TR><TR><TD CLASS="quote">

depends on your tire size. if your tires are smaller than stock on that car or possibly if you're using the wrong VSS it may be seeing the wrong speed.</TD></TR></TABLE>
Oh, good call on that, I didnt think of it

 

am using a honda vss and ive tried replacing the vss too..... in first gear when the vtec kicks in @ 7200 i end up getting **** loads of wheel spin.. had there been NO vtec in first at all it wud take ages to climb upto 8000 rpms

i did an auto to stick swap and before with the auto tranny it was all good...i also changed the cylinder head with a manual tranny b16a cuz of the cam specs..the auto ones being less aggressive with a wider LSA.

 

I would say try different ECU's, clean VTEC solenoid, check oil, ect.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by j87w &raquo;</TD></TR><TR><TD CLASS="quote">I would say try different ECU's, clean VTEC solenoid, check oil, ect. </TD></TR></TABLE>

Then it wouldn't consistently happen in 1st gear only. I'm with the others that say the speed sensor is sending things to the ECU wrong. Check the speed sensor (there should be a test in the FSM). Also, what speed are you going at 7200rpm in 1st?