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What would cause a 4Runner to start cold but not when warmed up?
Wiki User
∙ 12y ago
i need a year on this one.......there are different reasons for different systems.if it has a "check engine" light on though, have that fixed first!
AnswerIt could be a crack or hole in the air intake hose. Look in between the MAF and the throttle body. When there is a tear in the hose, the MAF gets all out of whack and will start when the motor is cold, but will die when it gets warm. Another symptom is if the motor is warm and you try to start it, it will start fine, but will not idle and will die very quickly. If you do find a tear or hole, all it takes to repair it is some electrical tape to seal the hole.=It took me almost a year to figure this one out! And not one mechanic could help me.My 1990 4runner would start great when cold, but after running a few miles (like going to the grocery store) when I would try to restart it, I would only get a single click from the passenger side of the engine compartment. I went over the entire starting circuit. Main areas to look are- ignition switch, neutral safety switch, and the starter and selenoid on top of the starter.After replacing the starter (not cheap) and a lot of frustration I found that the wire running from the battery to the main fuse box was corroded under the insulation. I slit the rubber with a razor blade, and found it corroded.I replaced it with a cheap battery ground wire (around 4 bucks) and it solved my problem.Note- You may want to get a replacement wire from Toyota, since it has a special connector attached to the fuse box. I just spliced mine where it was bad.
Wiki User
∙ 12y ago
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