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What causes your 98 4Runner to sputter and die out when you first turn on the engine?
Wiki User
∙ 12y ago
I can think of several things off the top of my head from bad gas to clogged filters. Several things tho will pinpoint the area of concern. I make several assumptions from your question. 1 This only happens when cold. 2 Once its running it runs fine. 3 you checked and changed the obvious air filter, gas filter and refilled the tank at some time after the problem happened. If you didn't then also check those.
Next I would look at the temp sensor and see if its working. You probably have the V6 so its on the middle of the engine near the fire wall. Then I would remove and check the cold start injector. Its on the left side of the intake manifold. Has a bolted hard line from the injector manifold. Internally they get pretty clogged due to the dirt in this area.
Lastly check the emission system hoses for cracks or holes. Especially where they enter the engine. Take one end off follow to the other end and see if you can blow air thru them. Then check and ensure they are open going into the manifold. Again the environment they reside in can be dirty and clog the ports.
Wiki User
∙ 12y ago
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