Engine surges and misfires, cannot accelrate rpm anymore than 2200 rpm, engine boggs down and when cold engine does not rev up to warm itsself up.

Your automatic choke is in need of adjustment.

Should be about 2200 when cold and 900 when warmed up. It is not stepping down properly. EZ fix.

MDS

Your toyota technician should know what a "cold starting solenoid" is. It is the little thing that works your throttle until the motor warms up and something else takes over. I'd suggest going to another technician.

My vg30 dnt rev more than. 2200

Check & replace ambient air temperature sensor

The ideal idle rev rate for your vehicle should be approx 800 rpm. If the engine is surging in revs and then dropping off shortly after starting from cold, then it may be that your engine is trying to compensate for the fact that your thermostat has not yet opened. It would help to know if the engine revs settle down after the thermostat opens. Diesels do not have spark plugs, they have glow plugs that preheat the air within the piston chamber so that first starts will occur without a huge drain on the battery, this means that the engine relys on the compression of the diesel and air mixture going into the piston chamber to reach maximum compression and then explode thus causing the power stroke within your engine. But when an engine is cold the engine has trouble sometimes reaching that explosive temperature within the chamber and sometimes not all of the power is released with each stroke of the engine. When the temperature rises and the the thermostat opens the engine can reach the explosive temperature more efficiently and the revs settle down to a more even rate.

Check to see if your air is getting through the turbo alright, sometimes a simple thing like a blocked airfilter can cause symtoms such as what you describe, failing that I would get your Diesel pump checked out, that may have a slight blockage. As an afterthought, have you checked your diesel filter(s) and fuel lines, they may need cleaning out as well. That may cause the rough running until the diesel warms up and flows better through the fuel lines.

Hope that helps.

Change fuel filter.

vacuum advance working ? do manuel check with cap and rotor button off and see if it's moving. chris

Check your EGR or your Idle control Valve. This can cause a problem with your irratic idling

Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

dude seriously the oil is cold and cant circulate, all cars must warm up when their cold. if you dont let it warm up you could be damaging critical parts to your engine