Hey I took my head of my h22a1 and replaced it with a head of a h22a4 now vtec won't engage. I tested the Vtec solenoid and it seems to be working fine also got a new one and still no Vtec. the engine light is not on i tested the oil pressure and only getting 80psi of pressure when driving around 5500rpm and no pressure when stationary out the same rpm also made sure the oil was full. vtec was working before I touched the head. car feel better with the new head only problem is Vtec won't engage.

 

any headwork done there?

which head gasket you used?

 

the guy that owned the head before me pulled it all apart so I had to reassemble it and I used the h22a1 head gasket.

 

If you are missing ONE rocker arm dowel, VTEC will not function. I recommend a closer look at the head internals.

 

i pretty sure that I didn't miss one will have a look tomorrow though to make sure. Any other ideas in case that's not the problem?

 

double check valve adjustments

leak and compression tests done?

 

ok will do the compression and leak test tomorrow before I take the valve cover off And recheck the valve clearance. The valve clearance in the manual is different to what the sticker under my hood says. Which one should I use?

 

sounds like the chassis was for a different motor or for some reason someone put a different engine's sticker on your hood to throw you off lol

 

ok good thing I used the ones in the manual in the end

 

Double check all wiring and connectors for pressure switch and solenoid.
Make sure there are no blockages in the oil passages for the head.
I know that both the H22A1 and the H22A4 use a removable oil orafice thats inserted into the block, perhaps they are of a different spec/flow?
VTEC requires/references:

• Tachometer
• Engine Coolant Temp
• Vehicle Speed Sensor
• No DTC's/CEL
• Throttle Position Sensor
• Oil Pressure
• VTEC Oil Pressure Switch
• VTEC Solenoid

Here's a link to another thread about no vtec:
https://honda-tech.com/forums/honda-...thread-830163/

 

the head is supposed to have the oil control orifice in it, i'm wondering if it's missing on the new head

https://www.hondapartscheap.com/auto...nder-head-scat

 

hey sorry I haven't replied it's been raining so I haven't been able to work on it. The head has the oil control orifice as I replaced the o'ring.

ps. The old head didn't have an o'ring on the oil control orifice just a bunch of gunk where the o'ring ment to be

 

Honestly, the first thing I would think is to triple check all of the wiring, might be a loose ground or such.

 

hey I think I've found the problem some of the primary rocker arm pins were stuck and wasn't enabling them to lock. I am in the process of replacing them with my old ones. Hopefully that fixes my problem

 

It only takes one. Make sure all pins are in place and moving smoothly... then you will be fine.

 

Yep it was the culprit of my problem took it out for a drive and now she working fine. Thanks everyone for the help.

 

im having the same issue with my h22 same exact thing no vtec after head gasket checked all sensor all wiring everything but rocker pins , did you by any chance took pictures when opening the valve cover and such