Interesting indeed, Im not sure if i have the pre or post 93 20V. A mechanic told me its OBD II i have. Also it's the type that kicks in VVT under load, not at 4400 rpm as some say. Jan 11, 2017. UPDATE 4age silvertop lean. VVT unplugged runs better. 26 posts • Page 1 of 1. SR85DET: Club4AG Enthusiast: Posts: 131: Joined: Sat Feb 16, 2013 3:16 pm. How to Guide: 4AGE 20v Oil Control Valve (Page 1) - Toyota 4AGE / 7AGE - www.9000rpm.co.za. - Hesitation on VVT activation - No activation of VVT at all. Aug 27, 2008. I only get speed sensor error, but that's cause my dash is mechanical. When disconnecting VVT sensor (oil control valve) it revs a lot smoother, but problem still remains to some extent. OCV gives good values btw so I think VVT is actually activating. It's been cleaned, but it got even worse. Any suggestions. I know this because i have a LED on the VVT. Some say thats silly and makes no sense but it helps in geting to know your car. The car works alright you know, i think im not hitin full rpm thou, and i did read it can be because of the same speed sonsor. It's there, and wired to the ECU but i dont have the 101 dash so its not runing to the speedo. The gradual pick up i was talking about, i think it may be sumthing simple like dirdy injectors, but i cant find a way to take them out and clean them, i tried filling the rail with cleaner and flushing it out with fuel pressure. It worked a lil but not 100%. If its sumthing elce I may need to try your method. I also believe i am burning on the lean side. This can be because i had to move the tps to bring down my idle. And with the higher lift cam ill need more fuel. Also with the soon to be 2mm bigger ITB's if they bolt up. Anyway you said: the 2nd of which comes with OBD II and is much more similar wrt pin designations to the blacktop ECU.On the 20V post-May 1993 S/T ECU, there are 3 plugs, the rightmost of which is the 22pin 'o' plug, this is your concern at this point.: So i take it im finding that wire, hooking it to a LED light and reading the light patterns? Covering some of the common and smaller pieces of information covering the interfacing of aftermarket ECU's to 20V 4AGE engines. Ignition outputs. Dec 05, 2008 This video shows VVT activation on 4AGE 20V Blacktop (from AE111 Levin/Trueno). I've wired up the VVT. Whats, ( +ve & -ve & cct )? I think i gotta buy a book on this. Hi, I know this is 4 years old, but I'm replying to the original post regarding the VSS troubleshooting. And I'm a newbie I think I'm experiencing something similar with my Blacktop 20V right now. When the CEL came up, did you feel any sudden effect on your car like power loss or did you feel perfectly normal? I'm feeling the latter. Another thing, I read that the VSS in general is used to support ABS. Is this also the case with 4AGE? The transplant job I had didn't include any ABS, it was just engine and fuel pump. So if this is true, then the CEL issue regarding VSS can be ignored? Gurus, please advise. Having a problem with a 20v, when goin into kick down the car hold back sputters an then goes again. At first i thought was plugs as the man had in some 5's in it and it was pinging, my padnas who were working on the car serviced injectors, replaced fuel filter, and regular service. They retarded the timing and they said the pinging eased up, car i using premium. They called me and told me when they unjacked the solenoid for the vvt they said the car worked fine, i am tinking it is a fuel problem as the man said he didnt no if they person who installed the engine replaced the original pump and well the guy who installed is dead now i am yet to check the fuel issue, anyone ever came across this as yet? Shem_lexluger wrote:Hi, I know this is 4 years old, but I'm replying to the original post regarding the VSS troubleshooting. And I'm a newbie I think I'm experiencing something similar with my Blacktop 20V right now. When the CEL came up, did you feel any sudden effect on your car like power loss or did you feel perfectly normal? I'm feeling the latter. Another thing, I read that the VSS in general is used to support ABS. Is this also the case with 4AGE? The transplant job I had didn't include any ABS, it was just engine and fuel pump. So if this is true, then the CEL issue regarding VSS can be ignored? Gurus, please advise. In the time that my VSS wasn't properly connected, I had no real issues w.r.t. With the car (I mean, other than an annoying light and a lower rev cut) AND I had no speed cut, but I got an error light for it all the time. It's not something I play with really because if the CEL comes on, I don't want to be complacent and assume it's a VSS issue and ignore it when it could well be something else so I connected it properly for peace of mind. This caused me to restore speed cut, BUT, only about the middle of last year I had an issue with the car and had to drop it off by a mechanic, who for some reason connected my fuel pump relay direct to ignition instead of through the ECU (there's a pin from the ECU that goes to the fuel pump which apparently switches off the pump when speed cut is activated). Speed cut gone once again and no VSS error codes. I'm thinking it's a fuel issue as well. If you can reproduce the problem in neutral, maybe a FP gauge might reveal a problem in the rail which could point to a bad pump, bad FPR or bad MAP sensor. Of those three, only the MAP sensor would throw an error code and it has to be pretty far gone to throw a code. I'm a tad confused that disconnecting the VVT solenoid gets rid of the problem unless there's a short in the solenoid coils (which SHOULD trigger an error code) or a really far gone VVT gear that doesn't engage the cam overlap when it should causing the extra fuel that engages during VVT to bog down the engine for a second. Does the VVT gear rattle like crazy at idle and ease up at around 2500rpm? If so, and you notice that VVT isn't as agressive/noticeable as before (remember it's a mid-range power-adder so it's not nearly as aggressively noticeable as VTEC but you do hear and feel a difference) and cam timing is correct, you may have a bad VVT gear. It's tricky to get one in good condition, cuz it's a trial and error process really (and very labour intensive). Try as much as possible to first eliminate fueling as a source of error. Balance the ITB's as per the service manual, check plugs and wires and pretty much set back everything to stock settings before troubleshooting. Believe it or not, it could be as simple as a vacuum leak. There's a network of vacuum tubes and check valves below the ITBs that most people tend to take for granted so don't ignore those. But you know what u doing already.start with the simple stuff first. Universal 4-wire narrowband lambda sensors are usually the zirconia type (it generates voltage, so two wires are for heater, one's sensor signal and the other's ground), however a lot of Toyota 4-wire sensors are the titania type which is a resistance type sensor and relies on a reference voltage sent from the ECU (two wires are heater, one's a signal wire and one's NOT ground, but has a voltage). The two types are not interchangeable. Based on your findings- in which category does the 4age 20v silvertop o2 sensor fall? Teamcam wrote: here is my graph with VVT Boet thats a nice looking graph Nazeem still making 20v shine in P.E. Q= Aadils 20v ran with 280's then he put bigger cams in think 300+ but wasnt happy with bigger cams and put the 280's back,with those 280's he got 139kw and 172nm last time we were at a dyno day @ AUTOGRAPH on his 1.6 motor as the 1.8 no longer in use, this was with VVT. Why did you go so big?, because 1400 body got no weight so you didnt worry about loosing at the bottom? Last edited by Silent Knight (2009-11-11 12:46:02). I think your scenario is an interesting one brother.you see your 304 degree cams are cut cams (lengthened valves) and not billets.hence you are running standard lift on the cams. In this case retaining VVT would actually work as the operation of VVT on the intake cam will not interfere with the head @ standard lift? We didnt even know it was possible to cut the standard cams to 304 degrees? It would be interesting to get Robin's view on what is actually hapenning in your setup?
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