1997 Toyota 4Runner does not start when hot

ALFRED JOVERO

MEMBER
1997 TOYOTA 4RUNNER

Engine Mechanical problem
1997 Toyota 4Runner 6 cyl Four Wheel Drive Automatic 180.00 miles

my forerunner does not start when hot, it starts fine when cold, such as in the morning and when it cools down after driving in traffic about an hour or so.
when it's hot it takes about 10 to 15 minutes to start again, with some popping in the exhaust it eventually starts
one technician couldn't find any codes that linked to the problem when he hooked up the scanner, so he suggested to change the crank sensor, which didn't solve the problem
one mechanic said to try to check the coolant temp. Sensor. Which I didn't yet.
pls. Help this has been happening for about 3 months now.

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Next time it refuses to start hot or cold- don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing