Happy new year too

Did you advance or recue it?

Any gains or dis advantage

Happy new year too

Is it possible i have turned the top cam around one full turn and mixed up my timing by mistake. Something is making this engine not run properly and ive done the dial gauge this to 1.03-1.09 a dozen times keeps running bad and chocking itself with smoke and stops.

In a Renault engine happened to me that the pulley tooth broke off, getting the cams off point, take a look and see if your pulley didn't spin on the pump shaft. Could be that, just taking a wild guess. Hard to believe that the pump internals could get damaged to the point of 6 tooth offset... Something would break because the metals in the pump are very stiff, not the bending type... That's my guess

You still have to tweak it by tilting the pump, but for so long as diesel in injected after atdc its ok even if you advanced it by one tooth.

Advance timing increases fuel efficiency and power output.

@@westendinventor364 from what I've seen, and experienced, diesel takes some time to burn that's why you start injection before TDC as compression raises then ignites the diesel, and you still pumping diesel in untill after TDC, because if you inject all the fuel after TDC at higher RPM is going to smoke because compression will decrease and burn will stop happening, heating up diesel causing black smoke. The point is to ajust timing so it injects somewhere between bTDC and aTDC, finishing injection aTDC. Somitimes injection is started 30° bTDC so it has time to dump all the fuel needed in time for the engine to burn it properly. Timing depends on engine load and RPM

I have the same question I quest just to make your own but I’m not sure is there tdc for each cylinder or for the whole engine?

Sometimes you cant mechanically rotate the pump enough to match the right timing, so you use the tooth trick and then rotate to ajust timing. Every pump is calibrated differently. Stock engine is calibrated for low emissions, not efficient power production.

Stock engine is tuned for emissions, this way you tune the engine to make more power from the same amount of fuel.

@@engenhokas69 Hugo, I'm in agreement with you there. The issue was to correct an engine running issue by advancing the diesel pump by 1 tooth to correct this fault. If 100% of motor vehicles are produced at a basic tune and are running properly then adjusting the pump to correct any fault is incorrect and will just cause further issues. This person just needs (first of all) to go back to the basics and correct the initial fault. Only then can you start changing setting to improve power/efficiency etc. Just my pov though. 👍

Usually retarded timing causes black smoke.

Yes, because diesel is injected until too late and doesn't burn, only gets hot and black like burnt food, that's the smoke. Heated up diesel until it turns into coal

Obviously.

Yes, stock engine is calibrated for emissions, this is for power efficiency. Get more power from the same fuel.

Check m boss magnetic sshut off valve ng injection pump

I've heard of offsetting by one tooth before with 1990s Lucas EPIC instead of keep replacing a good belt just because it stretches at high rpm. But can't see how that changes the timing (unless it's the mega-old open loop tech with mechanical IP) , The crank sensor and the ECU mapping does the timing, not the teeth. If timing went out of timing actuator control range then the PCM would light the EM light or go limp mode or stop immediately after starting.