Testing and diagnosing 1uz cam sensor and crank sensor faults.
Вставка
- Опубліковано 10 вер 2024
- The Cartune Company (2003) Ltd in New Zealand does 1uz and 3uz conversions / parts and wiring. We have been working on UZ Toyota V8 engines since 2004 when we did our own Hiace van to transport dirtbikes around NZ. Since then we have swapped to doing mainly just Lexus V8 work from a family owned farm hidden away in our paradise , surrounded by the NZ native bush. We sell parts and simple to follow wiring instructions for the 1uzfe engines. For enquiries email info@thecartunecompany.co.nz Take Care. Kelvin
Another thing worth mentioning is that the crank and cam sensors can work fine till they experience heat from the engine and then break down internally. Had this on mine, it would run for maybe 5 minutes then stall and wouldn't fire until the engine was cold again.
Yes it is. While Its not something I see much, it does happen. I've spent lots of time over the year warning up sensors to see if they fault or test driving with test equipment to test when it it hot and faults. Cheers Kelvin
Late to the show but this was very useful and informative. Really appreciate the break down each step, system, each tool and usage best. Your years of experience really shows and speaks for itself.
Much thanks again. 🇧🇸🇧🇸
Glad it was helpful!
Dude just what I needed! I have a crank no start issue im guessin is my PSP Leaking on my alternator. Gonna rebuild PSP and get new alternator. We shall see what happens.
hope it goes well. Cheers
Another great vidya from the professor in UZ engines!
Thanks again!
Hi Kelvin. So I have a 1992 Lexus SC400 1uzfe 1st gen engine. Recently since about 3 months or so my car randomly shuts off (every few days) especially after doing donuts (on the snow), revving very hard a few times, driving high speeds/high rpms on the freeway and then suddenly it shutting off upon stopping at lights etc etc. About 3 weeks ago i took a 3 hour drive and every now and again it would shut off upon pulling into the petrol station or service centre to rest, at loggts etc. On my way back, upon stopping to fill petrol the car shut off as soon as i stopped at the pump and then refused to start at all. No battery light at all in any of these many occasions. All I could say is that the cars shutting off intervals while driving were getting closer and closer till it was almost 4 to 5 times in a 1 hour drive around the city just to do daily tasks
To cut it short i did the below mentioned:.
Got vehicle towed home assuming it was the alternator because tow truck driver even got the car started with a booster pack once i reached home so thag i couldn park car on garage.
Based on the above assumption that it was a alternator on its way out, I changed it with a new one but now i think was wrong because vehicle isnt starting at all. It cranks fine but it feels like there is no spark. Upon changing the alternator, on my first try to start the car, the cranking sounded fine like normal when suddenly (a few seconds into my 3rd attempt to start the car) the crank speed sounded "faster" and there was no sputtering of fuel or spark. Im stumped and my brain is fubar lol.
Thanks heaps for sharing your knowledge Kelvin, you're a legend!
My bad cam sensor signal turned out to be inducted by faulty spark cables and distributor caps. I use coil on plug now, and the signal is clean.
Some aftermarket ECU are prone to interferance if they dont have correct shielding in the wiring. Ive seen this a few times now. Lots of fun to find. Cheers Kelvin
I enjoyed the diagnostics Kelvin. The ECU really is the weak link of the mighty 1UZ
Hello Billy. A lot of my early years as a mechanic was doing diagnostics and I also enjoy the process of fault finding. Well maybe I enjoy the feeling once Ive found it. Kind off funny as we had cam, crank issues when this loom was fitted onto the customers vehicle. At least I knew my side was correct. Cheers Kelvin
God bless you man! Have a Fosters or Carlsberg on me!
Thanks.
That flex plate ringing like crazy...wow
sure is. Really shows how much they bend without the torque converter.
Howdy thanks for info diy and the lingo down under to understand it better:)
"I'm usually a mellow person" Nope. he one scrapper. lol
I think english is a crazy langauge , and I really have been learning to be careful with what I say since having this channel. Cheers
so the engine will still run perfectly normal with only 1 crankshaft sensor?
So my car isn't starting it started with starting fluid for a second I changed fuel pump and sending unit still no luck what would you recommend it's a 1uzfe on a Lexus gs400
Hi Kelvin! My 1992 Lexus SC400 has been jerking when going from Neutral to Drive. When looking at the RPM's I noticed the RPM's are ~200 lower in Neutral when compared to Drive. This consequently causes the car to jerk when going into Drive when shifting down from Park to Drive. I have calibrated both TPS sensors with the method you showed in your other video, Additionally have replaced all spark plugs & wires, rotors & caps. Before tearing into the crankshaft sensors for diagnosis, have you potentially came across this issue and think it might be a electrical problem (maybe crankshaft position sensor or bad MAF sensor) rather than a mechanical problem in the transmission? Any advice or guidance would be very appreciated.
i have a 1UZ with spitronics standalone. i have the issue that the engine at around 3k rpm has power loss and does not want to rev higher.. any idea what that could be?
Could be lots of things from a crappy tune , to a mechanical tune issue. I recommend diagnosing correctly. Cheers Kelvin
Hello! Just got a lexus with the 1uz, i have a code 13 which seems to be either the cam sensors or timing belt. Timing belt is spot on and isn’t off any teeth. But the cam sensors have a cut in them and the metal shielding is messed up inside the wires. Car drives great,idles great, starts everytime. Could the cut in the wire cause the code? Im assuming from watching your video the signal isnt clean due to the cut in my wire. Let me know what you think :)
yes cut wires could cause this code. Cheers Kelvin
@@CartuneNZ I ordered 2 new cam sensors, I’ll let you know ty for your awesome video!
@@user-fo7jd8be8gdid it fix it?
@@Kristophuh yes it did. I replaced both cam sensors and it did the trick.
That didn’t have a 1uz vvti inlet on it??!! Great vid Kelvin!
I think we can have a little gap. Its in a video which I predict to be popular , COP conversion in Non vvti engines. Slow internet , big video. Maybe next weekend. Cheers Kelvin
Hey man really looking for some guidance here. I put a 96 1uz into my Nissan Silvia and I have fuel, spark, but no start. The engine harness and ecu were tested on another motor right before I got them and they worked fine. Any ideas as to what else I can try or test to get my engine running? Thanks
Can i get a similar ECU out of a another car and just plug in and start it. Or does the key have to be programed ? on a 96 sc400
Some of the later sc400 have immobilizer from factory and while I suspect yours falls outside the immo units I would recommend checking. If its non immo then another ecu should plug in and run provided the correct ecu is selected
@@CartuneNZ i have a ongoing problem. It will start by giving it some throttle. Sometimes it runs perfect for 10-30 seconds then breaks up and stalls when the airbag light starts flickering.. I have a engine light on but the 2 readers i have tried won't link to the ECU. :( any suggestions? Almost seems like a loose connection somewhere but i haven't found anything wrong. Thanks!!
👍👍👍👍👍🔥🔥
Thanks. Cheers Kelvin
So, I'm needing help with this resistance test; I'm not sure where the pinout locations are, for G1 and G2? I'm also, uncertain exactly how you're placing the blk and red meter probes, i.e. blk @G1 and red @ G2? I'm certain, I'm at the correct ECU connector, but, then I'm lost.. unable to find accurate pinout diagrams for SC400 96 model. Thanks for sharing!
I have correct info in the wiring instructions which I sell. Cheers Kelvin
Hi i have a 1uzfe engine conversion when i start it i should give it a few revs to idle and it revs up to 3000rpm and sputtering dont go above 3000 after a minute of idle it revs perfect trow the range anny suggestions what it might be thanks
I'd be testing it, check live data , confirm wiring, check sensors, check ecu, check fuel flow etc etc.
im about to pick up a right side cam position sensor tomorrow, do i need to turn the engine to TDC before bolting in the new sensor? or will the computer figure out were its at?
Just bolt it up. When done correctly only goes in one place.
Kelvin, I have a 2006 Lexus gs430 and I’m thinking about swapping a 1997 1uz fe in it of course non vvti. Will it bolt on directly? And how much do you think it will cost for the build?
Hello. This suggested setup has the possibility to cause lots of issues to someone without suitable knowledge. Not enough information to offer a price. I have more info coming an such a swap which might give you some more ideas of whats involved. It is possible with the correct knowledge. Cheers Kelvin
My car does the exact same now i can go fix it
Glad to help. Cheers
Cool. Glad to help.
So I’m having a problem with my 1uz first gen I’m not getting spark on 4 of the cylinders I’ve change the packs wires plugs and still don’t have spark on 4 of the cylinders could the cam-position sensor be the problem ?
Did you fix this?
Hey! Where is the first gen. camshaft timing sensor located?
On brackets behind the distributor caps.
@@CartuneNZ can I write you personally somewhere.... instagram...FB?
Mine is like that too intermittent all crank and nonstart.. then i let it sit and fire up next day
Hi how are you my car lexus sc400 not start cam sensor wair tastar tasing car start I don't no why problem pls tall me ungkal
When cars dont start I get out my test equipment and find the issue. You can do the same. Cheers Kelvin
@@CartuneNZ pls Ur whotssap nambar gev me
@@mohmmdsakilbahicholutcanak294 I charge for my time for online assistance. Better to massage The Cartune Company 2003 facebook page for details. Cheers Kelvin
Test tools! Not testicles 🤣
Haha, make sure you use the correct ones.
I got a 97 ls400 that will start and run but as soon as I put ti in gear it dies out
ok. Might be best to do some testing to diagnose the issue. Cheers Kelvin
great job Kelvin.can you tell me how much for a complete set of plugs for the injectors,coil packs,tpc etc.for a 1999 lexus ls 400.thank you from tom from the epicenter of this shit virus.long island NEW YORK.
Hello Tom. We can sort if you still need them. Flick me a message at info@thecartunecompany.co.nz and we can sort it. Cheers Kelvin
Hello my 94 ls400 has a intermittent slow crank issue and a code 13 for crank sensor. Is the code and crank issue related? Half the time it cranks fast as hell and starts up. Other half it cranks as if the battery is low but still starts and runs good
Code 13 is cam or crank phasing or sensor issue. Incorrect cam timing is one common fault
@CartuneNZ thanks. Engine runs great and smooth plenty of power so I feel like the timing isn't off, but that's just mostly me being optimistic. I think I'm just gonna leave the car be and hope it's just a sensor
hi its crank sensor ac or dc on 1991 lexus ls400 1uz ? and cam sensor is it ac or dc ? thanks !