22re problems
#1
22re problems
while working on my truck today, running like crap, we noticed the engine was warming up but the radiator wasnt. we ran it for about 10 minutes when we noticed it. the temp gauge was showing it was warmn but radiator was ice cold until we took off the radiator cap then it started heating up. what would cause this and would it cause the truck to run bad. also the truck runs a hell of alot better with the tps sensor unplugged. what else would cause it to run lean?
#2
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The cooling issue you describe may just be a fluke, or stroke of luck as it would seem. My '92 4Runner don't open till its hot, which could take up to 20 mins depending on outside temp. But I know my thermostat sticks, this could also be the issue for you as well, or you could have something else restricting coolant flow (i.e. weak water pump). If you get this continuously, look into it further. This would not cause a poor operation or lean out, however a bad coolant temp sensor could.The TPS being unplugged will throw the computer into a default mode and depending on how the computers are programmed, this can effect multiple control systems, forcing the system to run at a factory preset to prevent engine damage. If you are running lean and that system is effected by the default parameters this will richen the fuel mixture and therefor making it run better. Its also possible the TPS's resistance values are out of spec. I'd manually Ohm the TPS to verify its within spec. If this doesn't help or after inspection, all is good, then your problem may be somewhere else
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feel the radiator hoses and see how "tight" they are along the surface. possibly the head gasket is leaking, pressurizing the cooling system so when u pop the cap, pressure is released and coolant is able to flow. And if it runs better w/o the tps, check its resistance/replace it. just a thought.
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Excellent point goodyota, I thought about the head gasket possibility shortly after posting.
Another possible way to check this is a gas analyzer or even checking the oil to see if there is coolant in it or if its milky. This is a good indication of a head gasket failure, BUT not always will this help.
Another possible way to check this is a gas analyzer or even checking the oil to see if there is coolant in it or if its milky. This is a good indication of a head gasket failure, BUT not always will this help.
#5
not a head gasket i wish it was that simple. checked the resistance on both the tps and air flow meter and both showed to be good. will the coolant temp sensor cause it to run lean. also what is the other sensor by the coolant temp sensor. thanks
#6
i just bought a 92 pickup for $3000. two days later now, the motor is making horrible knocking noises and is pretty much shot its sounding like, i dont know whats wrong yet. any suggestions for a good avenue to pursue towards getting a brand new 22re put in? i really like the truck and wanna get it running and keep it for a long time. Im from Oregon but im living in NorCal for another year now, thanks.
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Good Luck!
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#8
while working on my truck today, running like crap, we noticed the engine was warming up but the radiator wasnt. we ran it for about 10 minutes when we noticed it. the temp gauge was showing it was warmn but radiator was ice cold until we took off the radiator cap then it started heating up. what would cause this and would it cause the truck to run bad. also the truck runs a hell of alot better with the tps sensor unplugged. what else would cause it to run lean?
PM change the thermostat--fresh coolant
& yes a bad ECM temp sensor will make it run bad you have two sensors one for gauge one for ECM.
TPS can effect operation as well
are you running rich or lean?
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