I HAVE A 2005 YARIS WITH A 1KR-FE ENGINE. IT WAS OVERHAULD BY A TOYOTA DEALER NOW THE CAR WONT START. THE CRANK SENSOR AND THE CAM SENSOR ARE NEW. THE ENGINE LIGHT IS ON. WHEN THE DIAGNOSTIC MACHINE IS PLUGGED IN IT SAYS THE CAM SENSOR NOT WORKING. ALL WIRING HAS BEEN CHECKED AND THE PROBLEM STILL IS THE SAME. THERE IS SPARK ON ONE CYLINDER ONLY. THE ENGINE HAS BEEN STRIPED DOWN AND TIMMING HAS BEEN CHECKED ALL TIMING MARKS LINE UP AND ENGINE REASEMBLED. STILL NO SPARK ON TWO CYLINDERS AND SAME FAULT COMES UP SAYING CAM SENSOR FAULT. MOTOR CRANKS BUT WILL NOT START. lOST FOR IDEAS AS TO WHAT TO LOOK FOR NEXT.

SOURCE: 1999 Toyota Camry V-6.

when starting push gas, if runs
idle valve (IAC) stuck,replace or disassemble and clean the burrs
has two time this promblem

SOURCE: 1996 Toyota Tacoma wont start when the engine is hot and sits a few minutes

I Hope You All Appreciate This FAST and EASY Inexpensive Repair That Even The Toyota Dealers Dont Seem To Know How To Fix !!! The Problem Is The Air filter temp sensor. Look On The Left Side Of the Air Filter Housing and Disconnect The Plug Thats Attached To The Spark Plug Like Plastic Sensor Mounted on The Side Of the Air Filter Housing, Now Go Start Your Truck !!! Your Truck Will Start And RUN Fine Now ! Replace The Sensor Approx $59 at Autozone... This Should Fix 90% Of Your Problems If your In the other 10% and it does not Fix it , Email Me and Ill See If I Can Help ! People Have Spent Hundreds and into The Thousand Dollar Area Trying to Resolve This Intermittant Problem At Inept Shops with Illiterate Mechanics ! If Your Happy With This Fix, BE Generouse ! I Do Accept Donations at Paypal Send to [email protected] Thank You JOE Mechaniac

SOURCE: had the head redone, new Carb fitted, new

Sounds like you have your timing off. If it is backfiring, that means that 2 of your wires are crossed, causing the plugs to fire on the exhaust stroke versus the compression stroke. Recheck your timing.

SOURCE: toyota wont start

EFI= to Electronic Fuel Injection. If you have sparks, check for fuel delivery. Another is the electronic module on your distributor, but you already said you have spark and hopefuly the right "timming" too. So you checked the current and is OK, what else do we have.The computer? Remeber that Camry,is the cadillac of the Toyota. Some even have Lexus parts. So expect parts to be rather expensive!.

SOURCE: 1996 Toyota Tacoma wont start when the engine is hot and sits a few minutes

Found this solution and it worked for me on my 1996 Toyota Tacoma and fixed the problem you described...!!! Here it is --------"I Hope You All Appreciate This FAST and EASY Inexpensive Repair That Even The Toyota Dealers Dont Seem To Know How To Fix !!! The Problem Is The Air filter temp sensor. Look On The Left Side Of the Air Filter Housing and Disconnect The Plug Thats Attached To The Spark Plug Like Plastic Sensor Mounted on The Side Of the Air Filter Housing, Now Go Start Your Truck !!! Your Truck Will Start And RUN Fine Now ! Replace The Sensor Approx $59 at Autozone... This Should Fix 90% Of Your Problems If your In the other 10% and it does not Fix it , Email Me and Ill See If I Can Help ! People Have Spent Hundreds and into The Thousand Dollar Area Trying to Resolve This Intermittant Problem At Inept Shops with Illiterate Mechanics ! If Your Happy With This Fix, BE Generouse ! I Do Accept Donations at Paypal Send to [email protected] Thank You JOE Mechaniac"
The answer (above) came from this link and was posted by joe the mechanic on this thread
http://www.fixya.com/cars/t890232-1996_toyota_tacoma_wont_start_when