Question about 1995 Toyota 4Runner

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Hard cold start , coolant temp replaced , start injecter rigged with remote switch , it still floodes out

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  • Toyota Master
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If you disconnect the wiring for the injector and it still floods, the injector is usually stuck open.

Posted on Jan 06, 2014


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Toyota Ed

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SOURCE: car seems to not shift into 3rd when cold

The transmission will NOT shift into the final gear (overdrive) when the coolant temperature is below 177 degrees F. The OD is coolant temperature controlled. In short, the colder it is outside, the colder the engine is, and takes longer to warm up to operating temperature. The coolant, when it reaches 177 degrees F, satisfies the temperature sensor, which allows the final shift. Assuming that you do not have a thermostat that is stuck slightly open, this is a normal occurance. Thanks for choosing FixYa for assistance.

Posted on Apr 01, 2009


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2 Answers

Will not start when engine is warm sounds like it is flooded cold engine OK

Bad coolant temp sensor--makes ECU think engine is still cold so sends too long injector pulse flooding engine. Very common, and easy fix.

Apr 02, 2016 | Cars & Trucks

2 Answers

What does faulty temp sensor has to do with starting of the car?

When a temp sensor goes bad, it usually fails to a setting that makes the ECM think the coolant temperature is about -40 degrees F. This makes the ECM send MASSIVE amounts of fuel to the injector(s) in what it thinks is an extremely cold start. This causes the engine to flood and makes for a hard start. You may be able to get the car started if you do a "Clear Flood" procedure, which is to hold the gas pedal to the floor while cranking until the car starts. Even then, though, the car will run so rich that you may have to keep revving the engine to keep it from stalling out at idle. On the road, it may seem better, but your fuel mileage will be awful.

Oct 10, 2015 | Cars & Trucks

1 Answer

Where is the thermo time switch located

On thermostat housing there are three compmnents. One has a yellow wire going to it. That is the coolant temperature sending unit for the temperature guage. The second unit above it is a coolant temperature sensor which relates to the fuel injection system to tell the compueter what temperature the coolant is. The third switch is the thermal time switch and is the largest of all of the switches in the housing. This feeds information to operate the cold start injector which is operated for a "very" brief period of time (or window in which the circuit to the cold start valve wil energize) and is not quite the same as a choke. Just because the engine is cold doesn't guarantee that the cold start valve is going to energize. The sensor is more like a buackup to keep the cold start valve from opening every time you turn the key. The engine temperature just insures that this will not cause an accidental occurance flooding condition. It will not operate even it you have let your car sit for hours after having driven it. Usually it takes all day unless in a very cold climate, or over night before it will operate again. The coolant has to be stone cold.

Apr 29, 2014 | 1983 Nissan 280ZX

1 Answer

My 1998 tj jeep is hard to start, i replaced fuel pump because the filter had come off the end of it. and replaced the crank position sensor because i got a code po320 It ran fine for a while and then...

try to give it a little more gas it sputters an back fires! In the first place your not giving it more gas unless it running ! If just cranking all your doing is letting more air in . Your vehicle has electronic fuel injection , not a carbuerator . Till the computer see's a RPM over 300 rpm , it's going by programming installed in the PCM - engine computer . It sputters an back fires because of a lean condition , low fuel . When starting a fuel injection engine you don't touch the throttle pedal . And if you were to push it to the floor and hold it , the computer goes into clear flood mode. If the vehicle were flooded that is what you would want to do .
P0320 OBD II Trouble Code
You may have O2 sensor problem or a map sensor or coolant temp . sensor . Your best take it an have a qualifiedd repair shop diagnose it .

Apr 27, 2017 | Cars & Trucks

1 Answer

1989 mpv mazda does not start on cold mornings and days

I'm assuming the engine cranks with the starter but does not start and run.

check the operation of the cold start injector. This is a separate fuel injector that injects fuel into the intake manifold to help richen up the mixture for cold starts. It operates on a timer that is linked to a sensor that measures engine coolant temperature. Once warm or the timer runs out, the cold start injector is turned off. Other things to check:

Fuel pressure too high (floods engine through cold start injector), engine coolant temp sensor or intake air temp sensor is stuck at full hot (doesn't allow enough fuel for cold starts), fuel injectors are leaking (floods engine with fuel).

Feb 10, 2011 | 1989 Mazda MPV

1 Answer

I have a 1990 c1500 4.3 tbi when it is cold starts up fast and after it warms up it floods and is hard to start. In both cases after it starts it runs very good.I replace all the sensors and it did not...

If the connector to the coolant temperature sensor is loose, that could be causing the problem since that controls certain functions of the computer when the vehicle is warm vs. cold.

Sep 24, 2010 | 1991 Chevrolet C1500

3 Answers

97 Saturn sl2. Won't start after it gets warm. If you drive it for 15-20 minutes and try to restart it will not engage the starter. Wait a couple hours and it will start fine

It is your engine coolant temp sensor (ECTS). 99.9%. the saturn made them with a plastic tip, so they crack over time. A replacement should be about 15 bucks and not too hard to replace. You'll notice your engine temp gauge not working (always cold).

I don't know much about cars, but here's what happens. When your car is cold, the fuel runs rich. Your broken sensor is always reading that the engine is cold, but when it is warm, it runs too rich and floods your engine, not allowing it to start. When your engine is actually cold, everything is fine.

Mar 31, 2010 | 1997 Saturn SL

1 Answer

1997 Mitsubishi Montero Sport LS raditor fan

they rigged the fan directly because the temp sensor is defective. nothing wrong. just don't forget to turn on always the fan switch. or if you want, replace the temp sensor.

Sep 23, 2009 | 1997 Mitsubishi Montero Sport

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