Vtecaccord Posted November 23, 2006 Share Posted November 23, 2006 Hey guys, well my friend has a 1994 Honda Accord 2.2L automatic he just put in V-tec head in it yesterday, he also put in new spark plugs. The problem is that since he installed the V-tec the car red lines at 4,000rpms (with the V-tec on or off). What could be causing this problem? Link to comment Share on other sites More sharing options...
Jeffro Posted November 24, 2006 Share Posted November 24, 2006 Sounds like the ECU has gone into limp mode... I've heard of this happening once before on a 6th gen where the ECU wasn't wired quite right, so it wasn't letting him rev above 4k. He rewired his ECU, and it fixed that problem... I'll see if I can find it, but keep in mind that the info will be for a 6th gen, not a 5th... What engine/head are you using? Link to comment Share on other sites More sharing options...
Jeffro Posted November 24, 2006 Share Posted November 24, 2006 Clicky He mentions his problem in the 8th post or so... Link to comment Share on other sites More sharing options...
Vtecaccord Posted November 24, 2006 Author Share Posted November 24, 2006 This is my friends Accord, he got the head from an LX accord with a 2.2L engine, the head was ported and polished. Link to comment Share on other sites More sharing options...
Vtecaccord Posted November 24, 2006 Author Share Posted November 24, 2006 Usually what do you need when installing a V-tec head on a 2.2 Accord? Maybe he forgot to change something else. Link to comment Share on other sites More sharing options...
Jeffro Posted November 24, 2006 Share Posted November 24, 2006 Did he change his ECU? I'm pretty sure the non-v-tec ECU won't work with the v-tec one, but I'm not exactly positive on that one. If he changed the ECU with the head, he'd probably be ok I'd assume, but it certainly sounds to me like his vtec isn't being controlled, because around 4,000 RPM's is where the vtec should kick in anyway... Link to comment Share on other sites More sharing options...
Rick B. Posted November 24, 2006 Share Posted November 24, 2006 vtec at 4000 rmps? usually its at 5500. at least it was with my gsr motor and my stock civic motor Link to comment Share on other sites More sharing options...
Vtecaccord Posted November 24, 2006 Author Share Posted November 24, 2006 No he didn't change his ECU. Even if he installed the V-tec to operate manually(switch) does he still need to change his ECU? Link to comment Share on other sites More sharing options...
Rick B. Posted November 24, 2006 Share Posted November 24, 2006 are you saying he has a switch that he can flip to turn on vtec? Link to comment Share on other sites More sharing options...
Vtecaccord Posted November 24, 2006 Author Share Posted November 24, 2006 Yes Link to comment Share on other sites More sharing options...
Jeffro Posted November 24, 2006 Share Posted November 24, 2006 Funky... And my Accord vtec (for the 2.3 anyway) is at 4000 rpm's... It's different than the civ's. My redline is different, too... Link to comment Share on other sites More sharing options...
Jeffro Posted November 24, 2006 Share Posted November 24, 2006 And I redline at like, 6200 RPM's... 5500 would be WAY to high to start vtec, lol. Here's an example: Link to comment Share on other sites More sharing options...
Jeffro Posted November 24, 2006 Share Posted November 24, 2006 Ok, I have done some more research into this, and now I'm 99.9% sure he either needs to adjust his ecu, or get a new one. He should add 3 wires. Anyway, you can check out THIS link, and you should be able to find the info you need. The guy in the article was swapping a 5th gen head onto a 4th gen block, so its a little different for what he needed, but you can get an idea at least of what he should use. 99% of the stuff he should already have had (like timing belt, water pump, etc.) but the ECU is definately going to need changed, because you need to add 3 wires for the VTec Solenoid trigger, VTEC Pressure Sender, and a ground wire for the pressure sender. Hope this helps! Edit: Oh ya, he'll also need a solenoid, etc. according to another article... Here's another one, more specific for the 1994: Click Me Link to comment Share on other sites More sharing options...
Vtecaccord Posted November 24, 2006 Author Share Posted November 24, 2006 are you saying he has a switch that he can flip to turn on vtec? Yes, many people here do it the cheap way. Ok, I have done some more research into this, and now I'm 99.9% sure he either needs to adjust his ecu, or get a new one. He should add 3 wires. Anyway, you can check out THIS link, and you should be able to find the info you need. The guy in the article was swapping a 5th gen head onto a 4th gen block, so its a little different for what he needed, but you can get an idea at least of what he should use. 99% of the stuff he should already have had (like timing belt, water pump, etc.) but the ECU is definately going to need changed, because you need to add 3 wires for the VTec Solenoid trigger, VTEC Pressure Sender, and a ground wire for the pressure sender. Hope this helps! Edit: Oh ya, he'll also need a solenoid, etc. according to another article... Here's another one, more specific for the 1994: Click Me Good info thanks. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.