Changed my o2 sensor and put some oil in it. But still no vtec. Its not wanting to engage. What should i be looking for. I have a oil leak but dont know if that would cause it not to fire.

 

??? what motor? what car? what year?

 

sorry, obd1 gsr

 

any check engine light? sure you have the p72 ecu? (just basics to check)

 

well, if you have an oil leak, could be that you're not building enough oil pressure. If the ECU can't get the pressure that it wants, it won't let VTEC engage.

I would imagine though, that you'd have a CEL if that were the case.

 

check your oil pressure switch

 

no check engine light

 

I see in another thread that you put a gsr swap into your SE... did you change the ecu and do wiring for vtec?

 

i trade my 240 for this car and its got some oil leaks that need to be fixed but i cant hear vtech when i take it all the way to 8. I looked at the ecu and its a p28. dont know if its chipped

 

im building like 50 psi oil pressure how much should it be?

 

how sure are you that the vtec isnt engaging?? stock a gsr vtec kicks at 4400rpm and personally i cant even hear my own

 

you sure about 4400 that seems pretty low to me

 

B18c has dual runners - on stock VTEC point should be 4.4 - 4.6k rpm for the first and 6k rpm for the second. This should still be audible if its stock (mine was, at least).

If you have swapped engine in, ensure that ecu (p28) and wiring is connected and functioning correctly. Hate to join the bandwagon, but have you got the right ecu ..?

 

What mods do u have done to the car. I could not hear vtec on my 99 gsr until I/H/E. And the actual stock vtec crossover is around 4400 rpm and the secondaries are around 5800-6100.

 

turbo'd, intake manifold, exhaust

 

ecu. check it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crowder13 &raquo;</TD></TR><TR><TD CLASS="quote">turbo'd, intake manifold, exhaust</TD></TR></TABLE>

wait....you're turboed? what are you using for engine management?

 

hondata s200 with boost

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crowder13 &raquo;</TD></TR><TR><TD CLASS="quote">turbo'd, intake manifold, exhaust</TD></TR></TABLE>
thats why you can't hear it... turbo would muffle it does it rev all the way to 8200? and keep getting faster after 5000?

 

yeah it does, i usually just take it to 8k though

 

if you can rev it all the way to redline and there's no noticeable loss in power, it's working.

 

What engine? What Car? Did v-tec ever work? If it did work before...what was the last thing changed on the car. That could be your problem.

 

B18c1, 94 integra ls body, p28 ecu, recently had a turbo on it and i just stripped it off tonight, so i should be able to hear it after it goes back to stockish form

 

i hope you didnt take the turbo off just so you could hear vtec

 

lol