Vtec engages sometimes. Vehicle Speed: The car must be in motion (wheels spinning).


  •  Vtec engages sometimes. So I put in a VTEC light (inconspicuously though). Currently, the only engines that use the i-VTEC system are the DOHC K-series engines. This type of issue requires careful electrical inspection to resolve. How Do I Fix VTEC Apr 16, 2008 · i have a 2000 gsr no check engine light and car runs fine. 2 cams, currently testing the vehicle with only 10deg VTC in high cam, and conservative ignition timing before going to dyno, however, in the midst of testing, we're finding that the VTEC engagement is intermittent and it engages and disengages VTEC. sometimes when the vtec engages mostly under part throttle i hear a loud click from the motor right when vtec engages. At higher speeds, the second rocker arm engages, which opens the valves Sep 23, 2011 · Hello, I have aa 92 eg cx with a d16z6 swap. Jan 23, 2023 · Hey guys, K24 with Drag cartel 3. Vehicle Speed: The car must be in motion (wheels spinning). vtec cams in a non vtec head. Throttle Position: The throttle must be open far enough to allow for increased airflow in VTEC. Why the guy went from a stock sohc to another sohc, I have no clue. Dec 10, 2007 · This is why you should replace the VTEC gasket. This also should set a check engine light. May 10, 2008 · I'm finally getting started with my LS Vtec build that I've been planning all winter. i-VTEC - intelligent Variable valve Timing and lift Electronic Control. This is a combination of both the VTEC and the VTC technologies - in other words, i-VTEC = VTEC + VTC. Damaged wires, corroded connectors, or loose connections can disrupt signals within the VTEC system. . Mar 23, 2008 · First, lets talk about the sensors- there are 3: -TDC: Top dead center -CYP: Cylinder position -CKP: Crankshaft position Using these 3 sensors, the ECU can determine very important things: Which cylinder should be firing, when that cylinder is at TDC, and what position or angle the crankshaft is. The engine runs on a less powerful but more fuel-efficient camshaft profile at lower speeds. VTEC comes in like 5500-5700 RPM when redline is like 6500. I want it to work without the aide of a VTEC/fuel controller. If you want built internals, then you will most likely need a bigger budget if buying everything new. May 24, 2007 · The only difference between this i-VTEC engine and the older VTEC engines is the addition of the VTC system. and today i noticed that my car didnt sound the same Jun 18, 2004 · Notice the VTEC head uses 5/side cam retainers vice the 6/side used by the non-VTEC. Jul 28, 2010 · pr3 cams in a b20b. This means the NoN-VTEC pump will be turning faster then the VTEC pump at a ratio of 1. However, once the VTEC system is engaged, the engine can produce significantly more power. For some reason it likes it there and the transition is smooth and seamless in terms of the pull. Oct 23, 2025 · Sometimes the problem lies not in the solenoid or sensors but in the wiring or ECU itself. - This kit is the easiest and most complete way to supply oil to the head without any machining required and is very clean and reliable. my rev limit also happens to be my red line? sorry to thread jack, but if anyone knows what was done to my car, being Mar 26, 2004 · On my 97 EX stock D16Y8, I wanted to know once an forall exactly when VTEC engages because you can't hear/feel it on this SOHC. Honda's VTEC engine -- which stands for Variable Valve Timing and Lift Electronic Control -- was produced for both usability at everyday speeds and high-performance capabilities, adding a second rocker arm and cam profile to the valve train. Is this Nov 5, 2012 · For my tune VTEC engages at 3300 (stock Z3 with IHE bolt-ons). May 1, 2024 · Discover when VTEC kicks in and at what RPM, including i-VTEC and VTEC in K24 engines. any Apr 19, 2011 · sometimes it engages and 4200 rpms, sometimes 5500 rpms, anyhwere in between, and sometimes not at all. Apr 25, 2025 · Typically, VTEC engages between 4000 to 5500 RPM, although activation can vary across models and driving conditions. My LS/VTEC setup cost me a grand total of $2,800 But is estimated to put out 190-200whp. if anyone knows of anyone who's done this and: -how they did do it? -was anything shaved? -what increase did it provide? -was it worth it? -how did it change the fuel maps/afr etc, etc Nov 17, 2003 · Yesterday i completed my LS/VTEC setup, and i am facing a few problems, VTEC. -i have a 00 civic SI ecu, and i have the OBD2A-OBD2B harness adaptor, but i dont have a knock Mar 28, 2004 · From the All About VTEC article: In order for the ECU to initiate the VTEC system, 5 engine conditions must be met. where the gasket broke is where there were cracks, IDK how the gasket got so bad but it was brittle and all kinds of cracked when i pulled off the solenoid. 158 to 1 (19 to 22), regardless of engine RPM. Without a reliable connection, the ECU cannot properly command the system to engage. Mar 14, 2010 · VTC is active at all RPMs. i'm looking for ways to do this, not flames. If you didn’t notice already the VTEC retainers straddle both Mar 28, 2004 · From the All About VTEC article: In order for the ECU to initiate the VTEC system, 5 engine conditions must be met. Nov 2, 2008 · B20 non-vtec FAQ Guide I created this guide for a couple reasons, but mainly for the reason that there is ALOT of misinformation on B20's. The intake camshaft has the automatic self-adjusting cam gear which continuously optimizes valve overlap for all RPM ranges. only with the ECU. May 14, 2012 · all b-series vtec heads are the same difficulty. Closer inspection to illustrate the difference in width and construction. Dec 11, 2004 · Reason #2- the Gear is smaller on the NoN-VTEC pump than the VTEC pump. We see a remarkable transformation as the engine shifts from its conservative lobe to the aggressive, high-lift cam profile, widening valve openings and enabling greater air and fuel intake. How to identify your B20 Motor: Let's first start off by saying that ALL USDM motors will have a number after the last letter in it's engine code. Jan 21, 2004 · We now have a Full Vtec Conversion System for people that want to use an LS/VTEC or B20/VTEC set-up. To make VTEC kick in, the engine must operate at a high enough speed and under a heavy enough load. This has been occurring ever since I did an Dec 14, 2014 · Using a vtec head on a B1 block will require a lot of extra money that could be used elsewhere. This thread should end all of that misinformation and confusion. this allows more water to flow between the impellers and the center, and not be pumped out. But How can I tell if it's even engaging? When does vtec typically engage in a d16 and what possible problems could cause it not to work? I know the easiest way to tell is from Jun 14, 2024 · Generally if there’s any issue with the VTEC system, the system disengages and the ECU lowers the rev limit to 4500ish RPM. i want to know my best option. The B-series distributor uses "hall effect" sensors to determine the position of the engines Oct 18, 2005 · Well, you could build a ****ty LS/VTEC for less than 1g -VTEC head$500 + - $100 -Golden eagle Kit $200 -ECU $150 + - $50 only problem with this route is an under powered motor (for an LS/VTEC) and you'll have to rebuild it sooner rather than later. Gsr head has smaller combustion chambers therefore giving you a higher compression ratio b16 and type R heads flow marginally better but will yield lower compression that's are more technical differences but that's all you really need to consider at this point. Learn how VTEC works and how it enhances your driving experience. I figured id post my setup and plans to see what people think about May 14, 2012 · all b-series vtec heads are the same difficulty. Non VTEC retainers are held in by two 10mm bolts VTEC retainers are held in by 4 12mm bolts, two on ether side of the cams. Usually VTEC engages too late because of low oil pressure, which throws a code as described above. Aug 6, 2008 · hi, im still new to my car and the whole vtec works. it seems to respond to my driving style. Why so late? There's less than 1000 RPM where May 14, 2012 · all b-series vtec heads are the same difficulty. Temperature: The engine must have reached normal operating temperature. Step into the thrilling world of VTEC and its unmatched performance. As a result, it is important to keep the engine RPMs high when trying to make VTEC kick in. Reason #3 the impellers on the VTEC pump are spaced further out from the center. It’s a common failure point, especially in higher-mileage vehicles. Aug 31, 2025 · The VTEC solenoid is the electromechanical component that directs oil pressure to engage the VTEC mechanism. it ranges anywhere from 4200, to 5500, to no vtec if i am gentle on the throttle. Apr 11, 2023 · Hi! My b18c1 engine, from my 1999 Integra GSR, is making an odd sound at idle - it sounds like of like cam lope from performance cams (these are stock cams) or maybe more accurately is the sound of a slight misfire (as someone has already suggested). i recently went on a 400mile trip with my car and i would hit vtec on and off the whole trip depending on road conditions and if road was clear and would usually be on vtec on 5th gear. also sometimes when off throttle and decelerating i get the loud click when the vtec disengages around 4400 rpm. qjgn7 go9 fa4eifh 1wxg iy tft t4uneg bthq8 nkn ldco
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