Question about 1990 Toyota Pickup

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Runs poorly while warming up

My truck has a 3.0 V6. It starts great. High idle comes up just like it's suppose to. The problem is the intermediate warm up. It runs great when it is completely warm. It starts good, I can drive it 3 or 4 blocks, then it stumbles and has poor acceleration. After a few miles, when it completely warms up, it runs great. It kind of runs like the choke came off too soon.(old car problems) I know this doesn't have a choke, but I'm not sure how the cold start system works on this vehicle.

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  • jmcdaniels Feb 26, 2009

    186K on the 3vze engine. It suddenly began running very rough in high idle. It smooths out after the idle goes down a notch. I have a problem with the radiator leaking, so maybe the hot water, Solution #1 has something to do with it.

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Auto choke controled by the hot water system,sounds like someone has disconnected the pipes somewhere along the line as they were leaking,on or around the carb should be a round thing with two water pipes and inside is a bi-metal strip,which is most likely working but with no water through it or through the inlet manifold to preheat the petrol vapour hence your problem.soloution buy a small engined europen type vehiclelike a kangoo or berlingo and recycle the gas guzzler you have now.

Posted on Jan 15, 2009

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