Gojira san wrote:Timing belt. +valves/valvesprings. is my guess from the vid. and a mechanic recently mentioned something about a knock related to low fuel quality at high rpm, so if you have been running poor fuel, try a fuel system cleaner, and refil with premium. -no dice? my first stop would be a new timing belt.
Tomorrow, i can show the vid to the smartest mechanic i know. (30+years building racecars a HKS dealer, and a Toyota specialist) if he shakes his head? your wallet is about to get lighter. here's hoping..........
Also, a ECU reflash never hurts when weeding out engine issues.
Thanks, that would be great if you can show him and ask him what he thinks
The belt was changed at the right interval so wouldn't have thought it was that (is there any way to check?) Could be coming from valve or camshaft area though and the frequency is about right for that (rather than more regular like a rod or crank etc) Ive only ever run it on 99 RON fuel (and so has the previous owner from what he said)
With regards to the cam gears, mlcoolj, is there any way to check these or rule them out easily? Will have a search on here for threads related to that though
Thanks for all the help
There is no engine light on the dash. I haven't got a Toyota reader but I have got a bluetooth OBDII reader that seemed to show some stuff when I tried it a month or so ago (eg. Voltage seemed right but though weirdly the water temperature showed 160°! LOL). If that method doesn't work, is there a way of jumping the connector to show codes? (obviously I will have a search for it but thought I would ask in the meantime
Worth a go to see if it shows anything, so I'll do that first
My next plan is to start it and listen to the exhaust to see if there is any missing at that end.
Then do the same at the intake end with the air filter out briefly (as a side note, I've got the air box loose temporarily cos after I took the engine cover off to listen at the noise I dropped one of the bloody bolts down behind it! LOL I haven't run the engine like this though so that's not connected to the issue. Also need to drill the bolt out on the slam panel that holds the air scoop on cos that snapped
) Hopefully after listening to both sides it might maybe give a clue as to whether it's exhaust or intake side if there's a missing being heard?
After that I suppose it makes sense to clean the MAF and reset the ECU while the air scoop is off just in case. Does the engine check light usually come on with MAF issues.