Almera Hie there, kindly advise. I have a Nissan almera 1.6.The vehicle used to stall at stop signs and traffic lights. We opened the throttle body cleaned it because it was so so dirty, had some brownish powder like exhaust smoke.Now it doesn't want to rev. Every-time you rev it shakes the engine badly and dies. One thing we noticed is that you can unplug your MAF switch and your throttle switch and start the car and it starts. I thought with your MAF and throttle sensors disconnected the engine shouldn't run.

Clean Throttle Body and MAF. Check for DTC trouble codes.

https://www.google.com/search?q=2005+nissan+almera+clean+throttle+body

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Clean the Throttle Body and MAF.

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year make model (the job)

1. Purchase "02 Sensor Safe" throttle body cleaner spray;
2. Drive the vehicle a few miles, bringing it to full operating temperature, then park it in your driveway with the engine still running;
3. Gain access to the throttle body, and hold your thumb on the butterfly linkage so that you can open the throttle butterfly when the engine begins to load;
4. Begin by spraying throttle body cleaner spray on all linkages around the throttle body. If the engine begins to bog because it is aspirating throttle body cleaner, quickly open the throttle butterfly to keep the engine running.
5. Once you have cleaned all around the throttle body, spray cleaner DIRECTLY INTO THE THROTTLE BODY, opening the throttle sufficiently to keep the engine running. It will run rough during this process but try not to let the engine stall.
6. If the engine stalls, restart it, and continue cleaning the throttle throat until you see clean metal.
7. Pour some fuel system cleaner into the gas tank and drive the car a little more before parking it. Try to find an excuse to accelerate hard, WIDE OPEN THROTTLE momentarily if safely possible (as when accelerating to merge into traffic on a highway).
8. Drive back home.
9. Done.

Clean throttle body and idle speed control valve.
Re- learn the idle speed control valve.

Having a restoration shop and running several newer Jaguars I have seen similar situations. Intermittent multiple errors such as these can be caused by a low battery (or corroded connections) that "fool the computers". Also had a '99 XJ8 VDP have exactly the same issues over several months. Issue was a manufacturing fault in the sensors on the throttle body that caused the "limp home" mode - usually in stop and go traffic. Jaguar had an inspection and recall on the throttle bodies but that vehicle had gone through 3 different Jaguar dealers for service and none looked at TSB/Recall or performed the necessary checks on the throttle body. Tried cleaning the throttle several times (per Jaguar TSBs) but no change. Had to replace throttle body & problem solved (over 30,000 miles since then). Recommend making sure all air connections to throttle are clean and open and cleaning the throttle area to see if that helps.

On newer Jaguars (and other Al bodied cars) similar problems occur when the "ground" connections to the body become poor (usually through corrosion but sometimes through collisions). Connections may look perfectly normal but have high resistance. Careful when working with the connections - the posts are usually very loosely fastened to the bodies. Good luck.

try cleaning out the throttle body. you will need some throttle body cleaner. use a rag to wipe out all the carbon from the throttle bore and around the throttle plate

Try cleaning the throttle body and checking the air filter

Start with the simple and replace your fuel filter and clean your throttle body, When cleaning your throttle body pay attention to your IAC (Idle Air Control) valve passage way with is located on the back side to your throttle body air intake barrel.
Just follow the instructions on the spray can of throttle body cleaner and be safe. This should address your stalling issues from a dirty IAC valve.
Thank you for suing Fixya and be safe.

I would clean the throttle body before spending more money on finding a solution. Carbon build can cause stalling or idling issues at low speeds.
So cleaning it is pretty easy and cheap. You can use an old toothbrush and dip it in some gas or use aerosol throttle body cleaner. When you've loosened up the buildup just wipe it off with a rag that doesnt rip easily.
You can get to the throttle body by disconnecting the intake tube that starts from the air filter.

Battery not charging well when airconditioner on ( also engine speed not increase when air conditioner on )