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Old 04/03/2014, 08:45 PM   #1
LSfatboy
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Default h22a vtec problem

Ok I have a 97 civic with a h22a swap. With sst chipped p72 , I bought the car about 2-3 weeks ago. Vtec use to work and crack hard. Had a apexi afc neo controller and took it out. And still worked for a week or so. And stopped working out of no where and now bogs at high rpm, but driving normal its fine. I did replace the vtec solenoid and female insert. . Anything will help! Thanks


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Old 04/04/2014, 08:40 AM   #2
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Default Re: h22a vtec problem

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Originally Posted by LSfatboy View Post
Ok I have a 97 civic with a h22a swap. With sst chipped p72 , I bought the car about 2-3 weeks ago. Vtec use to work and crack hard. Had a apexi afc neo controller and took it out. And still worked for a week or so. And stopped working out of no where and now bogs at high rpm, but driving normal its fine. I did replace the vtec solenoid and female insert. . Anything will help! Thanks
Check your codes. Sounds like you're throwing one, vtec wont engage whenever there is a check engine code going on. I've seen it where a lot of tuners wont tune the non vtec graph in the higher rpm above where vtec engages so that would most likely explain bogging really bad whatever you do DO NOT go into RPM above your vtec engagement point since you'll risk seriously damaging your engine if you do.

Let us know what codes you're throwing or if you're not throwing any at all. Before you jump to the conclusion you don't have any make sure your CEL light on the dash is working. Can't count the number of times I've seen those unhoooked.


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Old 04/04/2014, 02:49 PM   #3
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Default Re: h22a vtec problem

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Originally Posted by Dj Technick View Post
Check your codes. Sounds like you're throwing one, vtec wont engage whenever there is a check engine code going on. I've seen it where a lot of tuners wont tune the non vtec graph in the higher rpm above where vtec engages so that would most likely explain bogging really bad whatever you do DO NOT go into RPM above your vtec engagement point since you'll risk seriously damaging your engine if you do.

Let us know what codes you're throwing or if you're not throwing any at all. Before you jump to the conclusion you don't have any make sure your CEL light on the dash is working. Can't count the number of times I've seen those unhoooked.
Check engine light don't come on, but it does work and has the light. Only does threw a code. not sure what the code is. When after it trys to hit vtec buy then I turn off the car and it cel turns off


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Old 04/06/2014, 01:57 AM   #4
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Default Re: h22a vtec problem

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Originally Posted by LSfatboy View Post
Check engine light don't come on, but it does work and has the light. Only does threw a code. not sure what the code is. When after it trys to hit vtec buy then I turn off the car and it cel turns off
Jumper your connector and check the code. ECT, VSS, VTP, KS can all cause no VTEC engagement. Low oil level can also cause VTEC to not engage properly due to insufficient pressure.

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Old 04/06/2014, 03:48 AM   #5
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Default Re: h22a vtec problem

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Jumper your connector and check the code. ECT, VSS, VTP, KS can all cause no VTEC engagement. Low oil level can also cause VTEC to not engage properly due to insufficient pressure.
Oil is good, not low. A buddy said timing may be off. That will cause for no vtec as well. I did try a stock h22 ecu still the same..


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Old 04/06/2014, 11:11 PM   #6
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Default Re: h22a vtec problem

Try making code appear then check code before shutting car off

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Old 04/06/2014, 11:38 PM   #7
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Default Re: h22a vtec problem

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Oil is good, not low. A buddy said timing may be off. That will cause for no vtec as well. I did try a stock h22 ecu still the same..
A timing issue would not cause a lack of VTEC. It could cause it to bog up top though. VTEC engagement is a mechanical function of oil pressure. The things I listed are what can cause the ECU to not engage the spool valve.

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Old 04/07/2014, 08:33 AM   #8
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Default Re: h22a vtec problem

Like H22 said, timing wont do that. Get your light to come on, leave the car running, jumper the plug to have the light flash and let us know what code it is.

Also just because your oil level is fine doesn't mean your oil pressure is fine.


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Old 04/07/2014, 01:14 PM   #9
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Default Re: h22a vtec problem

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Also just because your oil level is fine doesn't mean your oil pressure is fine.
Bingo.

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Old 05/06/2014, 04:57 AM   #10
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Default Re: h22a vtec problem

Ok, so I got the light to come one today. Did the timing so timing is good, but still bogs top end. Still no vtec but sounds like it wants to kick but don't, so I put the obd2 diagnostic test on the port and says. It can't get a diagnostic read, light went off when I shut off the car. Any way I can get it to read from somewhere else?


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Old 05/06/2014, 08:16 AM   #11
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Default Re: h22a vtec problem

The P72 ecu is an OBD1 ecu so an OBD2 reader will not work on it. You'll have to do the "paper clip" method. If I remember right (someone correct me if I'm wrong, it's been a while) there is a blue 2 pin connector on the passenger side of the car somewhat under the dash. You'll take a paper clip and jumper the two pins. When you do that the self diagnostics mode will kick in and cause your CEL to blink. Long blinks are counts of 10 short blinks are counts of 1. If there are multiple codes there will be a long pause between the codes. So example would be two long blinks followed by 4 short ones that would be code 14.

Here's what the plug should look like and this is how you would jumper it.


YOUR CHECK ENGINE LIGHT WILL NEED TO BE ON WHEN DOING THIS! So drive your car around and get the light to come on, when it comes on DO NOT turn your car off. Leave it running and jumper the pin while it's running. If you turn your car off it'll clear the code so you won't be able to read it.

Last edited by Dj Technick; 05/06/2014 at 08:18 AM.

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Old 05/06/2014, 01:44 PM   #12
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Default Re: h22a vtec problem

Ok got it.. so the code is 2 long 2 short. So code 12?


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Old 05/07/2014, 08:33 AM   #13
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Default Re: h22a vtec problem

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Originally Posted by LSfatboy View Post
Ok got it.. so the code is 2 long 2 short. So code 12?
If it's two long and two short that would be 22. Is that what you're throwing? 22 is code for vtec oil pressure switch.


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Old 05/07/2014, 11:12 AM   #14
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Default Re: h22a vtec problem

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If it's two long and two short that would be 22. Is that what you're throwing? 22 is code for vtec oil pressure switch.
Yup 2 long 2 short.. so how can I fix that. Just replace it?

Last edited by LSfatboy; 05/07/2014 at 11:14 AM.

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Old 05/07/2014, 11:15 AM   #15
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Default Re: h22a vtec problem

Could be a number of things causing it, bad switch is usually the culprit. Try replacing the switch with a new one, if that doesn't work then it could be a wiring issue or an oil pressure issue.


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Old 05/07/2014, 12:57 PM   #16
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Default Re: h22a vtec problem

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Originally Posted by Dj Technick View Post
Could be a number of things causing it, bad switch is usually the culprit. Try replacing the switch with a new one, if that doesn't work then it could be a wiring issue or an oil pressure issue.
Ok will do
What about the bogging still high end.. did the timing on by the dizzy. Still bogs. Was reading and I found "Egr valve" could be that problem?


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Old 05/07/2014, 01:50 PM   #17
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Default Re: h22a vtec problem

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Ok will do
What about the bogging still high end.. did the timing on by the dizzy. Still bogs. Was reading and I found "Egr valve" could be that problem?
How high of RPM are we talking, is it past your vtec engagement point? If it is and your vtec isn't kicking in, like I said before, I've seen a lot of tuners that don't tune the non vtec graph above the vtec engagement point which is more than likely what's going on with your car. I would replace the switch quick and see if that solves your problem first. If it doesn't, post on here to let us know what exactly it's doing.


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Old 05/10/2014, 12:23 AM   #18
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Default Re: h22a vtec problem

Ok I replaced it. Still no vtec, pulls harder, whole lot less bogging, higher rpm
Cel does kick on and throws the same code.


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Old 05/12/2014, 11:28 AM   #19
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Default Re: h22a vtec problem

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Ok I replaced it. Still no vtec, pulls harder, whole lot less bogging, higher rpm
Cel does kick on and throws the same code.
Well now you're looking at what might be a serious problem. First thing first, make sure the switch is grounded properly and the other wire isn't damaged. If the wiring checks out then you've got an oil pressure problem on your hands. This could be an oil pump going bad or a clog somewhere.


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