Ok, here is the scenario:
Customer drops off an H22A JDM OBD1 swap for his 97 Honda Accord.

The head is pulled off the block, yet it is still assembled (valves and valvetrain still in the head)

He has Skunk2 Stage2 camshafts, valvesrpings/retainers, valves, intake manifold, and cam gears. I personally tear down and reaseemble the head.

I did the H23 tensioner conversion on the motor, i also installed a brand new timing belt and water pump OEM HONDA. I install the headgasket and bolt the head down. i do a valve adjustment. We complete the swap.

Ok car cranks up, runs, idles fine. we put it on the dyno.

CAR WILL NOT HIT VTEC. here is everything i have checked out:
ECU is fine, ECU is Uberdata chipped, The ecu will change ignition and fuel tables but the motor will not hit VTEC

VTEC solenoid has been swapped 3 times, solenoid is getting power, screen is clean.

0 PSI OIL PRESSURE IN THE HEAD. I pulled the valve cover and turned the motor over. oil is coming up to the head , going over the rails, and dripping down onto the camshafts. but i can get any PSI reading from my gauge.

I tested by the sending unit below the headgasket, and i was getting 45-55psi. so i changed the oil pump out. i know you need at LEAST 60psi to operate vtec. Pick up and Pan are fine and undented.

I am about to tear the head apart, all i can think of is that i must have missed something in the head that is sposed to be there when he brought it to me off the block. This is my first H series build so i relly dont know the difference between them an B series. There is NO OIL control orifice in the block (like a GSR has) and the little dowel pin in the head is present.

ANY IDEAS ANYONE?

 

I have no idea, but figure it can't hurt to give you a little <bump>

 

Retarded question #1
OBD-1 in a OBD-2 chassis wiring harness?
Adapter harness?
non-Vtec block with a Vtec head? (yeh, yeh, you checked that already, right)

I only mention this 'cuz it's seems to be a *&^(%$# topic which pops up from time to time.

I find it scary that it was surrendered to you disassembled.
Make you want to go "Hummmmm"

P

 

Its not ECU and its no wiring. There is only 20PSI of oil pressure BEFORE the vtec solenoid in the head, and there is only 40psi in the bottom end. it will spike to 40psi, even with it revving to 5000rpms, and just fall back down. almost liek there is air in the oil pump. i checked the head and everything is there per the honda service manual

*UPDATE*

put the car all back together. everything is in the head for VTEC to work, i filled the head with 60psi of shop air and all the rockers locked together.

Tested Oil PSI at the Sending unit today, and it fluctuates at idle from 0-40psi. will not go any higher even when i reve it. all this with a brand new oil pump

WTF MATE.

 

Maybe there could be a bind in the bottom end. I know my racecar lost oil pressure when the bearing clearances were too tight.

 

i heard something about a balance shaft bearing , so im going to try that

 

what ecu are u running?

 

pick one

H22 OBD1
P28 Vtec
GSR ECU

 

question, you didn't mention it....
Did vtec engage before he brought it to your shop? The only thing I can think is it's not getting enough oil...but you already covered that...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by two_cam_ham &raquo;</TD></TR><TR><TD CLASS="quote">question, you didn't mention it....
Did vtec engage before he brought it to your shop? The only thing I can think is it's not getting enough oil...but you already covered that...</TD></TR></TABLE>

thats what i was gonna ask

 

customer bought the motor from an importer. full H22 swap. its history is unknown. i dont know if this motor ever hit vtec in its lifetime. i was paid to assemble the head, bolt it on the block, and swap it into the car.

He took the head off. he then brought be the block still attatched to the tranny, and the head. i assembled the head, and bolted it on, nothing was done to the bottom end.

we put it on our dyno, and it would not hit vtec, we had low oil pressure in the block, so i changed the oil pump out.

everything is in the head for vted to work (rocker arms pins, dowels, o rnig, etc)
it has low oil pressure and is cavetating on the block.

 

how about the O-ring in the head oil control orifice? Its under the no. 3 cam holder. B series dont have these.

 

its there. its bottom end related guys. i have low oil pressure at the sending unit on the bacl of the block. that is below the headgasket, that is where the poblem lies

 

are you taking it all the way to redline?
is the tranny an Accord unit?