92' civic/d15z1 block/00 y8 head - can't rev past 4,200 rpm
#1
92' civic/d15z1 block/00 y8 head - can't rev past 4,200 rpm
I have a 92' civic with a d15z1 w/ y8 (2000) head, and i can't rev it past 4,200 rpm, The check engine light doesn't come on when you drive it normal but once i start driving aggresive till 4k rpm it shows up but when i turn it off and turn it back on the check engine light goes away, i found out its a CODE 22, but have no idea what to do, i looked it up and it says its the VTECH Pressure switch but i dont know what to do about it, can anybody lend me a hand and help me out?
#3
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Location: Pensacola, FL and every Court House in Louisiana
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Re: New member,.. i need help with my civic.
What ecu do you have? Cali model? More info about your set up is really needed to help you out. I don't understand the y8 head? Did you do that yourself or did you buy like that? Z1 motors are meant to be for fuel economy not for aggressive driving. So I have a feeling that the stock z1 ecu is still being used and would be the problem.
FYI- Vtech is a company that produces electronics for kids
FYI- Vtech is a company that produces electronics for kids
#4
Re: New member,.. i need help with my civic.
Im not too sure on what ecu it has i barely bought it a week ago, the engine stuff it has is a "mini swap" , it drives fine until i get to the 4k rpms do you think replacing the Vtech oil pressure switch has anything to do with tht? because it sputters and doesnt wanna go past 4k...
#5
Re: 92' civic/d15z1 block/00 y8 head - can't rev past 4,200 rpm
Thread titles MUST summarize the tech problem so that members browsing titles can easily understand the problem without reading the post -- Title edited.
#6
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Re: New member,.. i need help with my civic.
Im not too sure on what ecu it has i barely bought it a week ago, the engine stuff it has is a "mini swap" , it drives fine until i get to the 4k rpms do you think replacing the Vtech oil pressure switch has anything to do with tht? because it sputters and doesnt wanna go past 4k...
I am afraid you got ripped off. I am willing to bet your problem is the ecu. A mini me swap is when one takes a non vtec motor and installs a v-tec head for added performance. The z1 is already a v-tec motor. It is the only v-tec that is not performance oriented but made for fuel economy other than the HX model found on ek's. Therefore there is no reason to try to add performance to a z1. Should have got a car with a different motor if you were looking for performance.
Look and see what ecu you are running first and take pics.
#7
Re: 92' civic/d15z1 block/00 y8 head - can't rev past 4,200 rpm
Any CELs? Are your sensors all working?
Either way, if it's really a Y8 head, that's a poor combination since the pistons in the Z1 motor will make it very low compression. There has been talk about rods being weaker than others, though I believe someone posted they're actually stronger. The good part, is the block is the same as the D16Z6, so you could put a Z6 crank, pistons and rods in and have the best 1.6L single cam combination.
Either way, if it's really a Y8 head, that's a poor combination since the pistons in the Z1 motor will make it very low compression. There has been talk about rods being weaker than others, though I believe someone posted they're actually stronger. The good part, is the block is the same as the D16Z6, so you could put a Z6 crank, pistons and rods in and have the best 1.6L single cam combination.
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#8
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#9
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Re: 92' civic/d15z1 block/00 y8 head - can't rev past 4,200 rpm
If you have a cel for code 22, and want it to go away...do exactly what i said in the 1st post. Whats the problem? Is it too hard, or what?
#10
Re: 92' civic/d15z1 block/00 y8 head - can't rev past 4,200 rpm
I have fixed the problem, i replaced the vtec pressure oil switch and it runs good now, except for my new problem that it'll back fire on me and sometimes a mild amount of smoke will pop up. How do you post pictures on this thread so you can see?, it also has a AEM Cold air intake and a 5migen exhuast, im thinking maybe the manifold exhaust thing is probably clogged, therefore im thinking of gettting headers?
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