my vtec on my b16 in my 91 crx comes on at about 4500 rpms and rev limites at about 7800 im a little curious about the vtec coming on so early does any one know why and if its good or bad

thanks in advance

 

how are you activating it? vtec control or ecu? what ecu?

 

its all wired to the ecu and it say b16 vtec on the ecu it came with the motor

 

omg search.. i just replied to a similar post 5min ago!!

 

calm down

 

my b16 was right on with the tach until the last few months i had it... the tach was reading exactly like you described it... i didn't really have an answer why but i believed the tach was off all of a sudden... if you have a friend who has an aftermarket tach you can borrow, try that, other than that i don't know.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by davidcrx89 &raquo;</TD></TR><TR><TD CLASS="quote">calm down</TD></TR></TABLE>

ha ha... you tell 'em, noob!

 

https://honda-tech.com/zerothread?id=1152197

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HamiltonRex &raquo;</TD></TR><TR><TD CLASS="quote">omg search.. i just replied to a similar post 5min ago!!</TD></TR></TABLE>

So did i.....https://honda-tech.com/zerothread?id=1151991

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by davidcrx89 &raquo;</TD></TR><TR><TD CLASS="quote">I have a question i just installed my B16 in my 91 CRX HF and it seems to hit the rev limiter at about 7800 RPM's and my friends cars hit at 8200 is this just a wierd difference in ECU's or is somthing wrong.</TD></TR></TABLE>

And my reply
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hahagasdcrx &raquo;</TD></TR><TR><TD CLASS="quote">swap ecu's with your friend and see if it still does it. More than likely your tach may be a little off.</TD></TR></TABLE>

davidcrx89..... you need to check up on post you've already made, not start a new thread about the same thing.

 

i did check them and they dont match!!! or answer my question so i guess what im saying is if your not going to help than DON'T REPLY!!!!!.
but thanks to those who were lots of help.

 

so i checked my ecu to see if its an auto as mentioned and its not also it is a PR3 ecu OBD0 and it is throwing a coolant tempature code and i double checked all the wires and the seemed to all be pluged in correctly

 

My OBD0 PR3 B16 ECU is set at 5200 for VTEC

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by davidcrx89 &raquo;</TD></TR><TR><TD CLASS="quote">it is throwing a coolant tempature code and i double checked all the wires and the seemed to all be pluged in correctly</TD></TR></TABLE>

okay... now check resistance and voltage

 

on the tempature sensor ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by davidcrx89 &raquo;</TD></TR><TR><TD CLASS="quote">on the tempature sensor ?</TD></TR></TABLE>

yep

 

thanks i'll let you know