Click on each picture for larger view.
Here are some pics of the parts. Hopefully they prevent you from getting the wrong stuff. I am too lazy to write the part numbers again here so you'll have to look at the diagrams above.
Fuel Injector. Notice the green connector. Image property of WitchHunter.com
Cold Start Injector
Water Thermo Sensor (right) and Start Injector Timing Switch (left).
Forgot where i got the below pic of Water Thermo Sensor from. The socket is not necessarily green as mine is grey, as seen on above pic.
EFI Vacuum Sensor, also called MAP Sensor. Also forgot where i got the pic from :P
Dad helped me with a little experiment back home. We have a Toyota Soluna with 5A-FE engine and it uses an EFI Vacuum Sensor also with part number 89420-16070. We borrowed from our usual spare parts seller, a few MAP sensors with the following part numbers: 89420-16050, 89420-12070 and 89420-12060 and another one was Turbo Pressure Sensor Assy part number 89420-16041. Here they are.
Notice how they all have similar connector shape. The experiment we did was replace our original 5A-FE MAP sensor with each of the sensors above and see if there's any difference in engine performance or, even worse, if the Check Engine lamp lits up. We found that the first three gave no problem at all. Idle and acceleration was fine and CEL lamp is off. The only problem we found was when we connect the last one, the Turbo Pressure Sensor Assy 89420-16041. The engine started only for a few seconds before it died. I've expected that since it's obvious from the writing on the sensor body that said sensor was for turbocharged engines while my 5A-FE is NA. All i am trying to say is based on the experiment, MAP sensors of different part numbers are interchangeable as long as they have the same working voltage (4A-GE smallport uses 5 volts, written on the sensor body) and not coming from a turbo engine if yours is NA (and vice versa).
Great write up bro, i had plans of explaining this later on in the months of my swap, dont know if i ever mentioned but we... meaning my friend and i, when doing his swap we were also without a MAP sensor, Igniter and coil, three key items to have a timely swap done, the MAP sensor connectors once the connectors match up should work as you mentioned, we once... before getting an NA map sensor were contemplating the use of a MAP sensor off a Toyota Starlet GT, the color of the label printed if i remember correctly was orange, opposed to the blue coding on the 4AGE, when consulting the electrician and also a tuner... they both say that it will work but the car will burn rich, i am not an electrician, mechanic or tuner myself but it made sense some where in there(my messed up head), the fuel settings if im not mistaken are stored in a map on the ecu and that in turn regulates voltage and intervals to the injectors..... im straying, in short the the sensors will work but because of the difference in aspiration the turbo MAP sensor may send a false signal. If i am wrong anyone, please let me know.
ReplyDeletehence your start and fall off with your experiment?, too much fuel and similar to a carburetor with too much fuel, flooding...
ReplyDeleteyup exactly Dereck, it's a problem of incorrect voltage reading if you use Turbo MAP sensor on NA car. I'll write about my view of how EFI sensors work, if i have the time (and mood of course) :)
ReplyDelete<Where could i find a left front turn signal for daihatsu charmant ?
ReplyDeletePlease give me map sensor number of 5afe engine.(toyota sprinter ae91)
ReplyDelete