Owned my 22R (great engine, love it) for 2 years and the pinging has gradually gotten worse.
No pinging when I purchased the car. 6 months later I noticed it. It started off very very minor in 5th gear under load at roughly 2-2.5k RPM, but now it essentially does it under load in any gear at any RPM under 2k and it is quite bad, I’m afraid to put my foot down. The car also has started to occasionally diesel when shut off for a cough or two.
I’ve checked the timing, 5 degrees when plugged, and 12 when normal. I’ve even retarded it back to 0 degrees which is apparently the factory standard. It did fix the ping, but was very underpowered and hesitated when under load. I’ve since reverted it back to 5 degrees. It’s a nice amount of power at that.
91 octane in my country is the minimum and cheapest grade you can buy so I run it on that. 95 and 98 which are the only two other options stops the pinging but are far too expensive to justify running the car on all the time.
I’ve replaced the distributor, dizzy rotor, spark plugs and leads about 6 months after purchasing the car It ran like a champ when I did so!
My next step is the PCV valve (waiting on parts to arrive from Toyota) and giving the carb a clean with spray (possibly hot spots?). Will soon be replacing the timing chain too as for high mileage. Also I’m not sure any of that will sort it.
Any recommendations from here? Thanks.
Last edited by Tyz987; 05-24-2019 at 01:40 PM.