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hard start 91 toyota 4 runner
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timjohnson
User
Dec 6, 2009, 7:38 PM
Post #1 of 2
(3346 views)
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hard start 91 toyota 4 runner
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1991 Toyota 4 runner
3.0 v6
214,xxx miles
This thing runs like a top once you get it started but if it has sat for a day or two it takes a minimum of 15 seconds of cranking to get it to start. Sometimes it is worse when it is very cold out. We have changed the following:
spark plugs
plug wires
distributor cap
rotor
air filter
Also I pulled the codes out of it and all I got was an o2 sensor and that turned out to be a broken wire.
I am thinking that the fuel pressure is bleeding off when it sits but I could be wrong. When the key it turned on I can not hear the fuel pump "cycle".
Any help would be greatly appreciated!
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Loren Champlain Sr
Veteran
/ Moderator
Dec 6, 2009, 7:53 PM
Post #2 of 2
(3340 views)
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Re: hard start 91 toyota 4 runner
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tim; Of course, fuel pressure is a concern. Connect a fuel pressure guage and check that. With the cold temps, I would be suspect of the coolant temp sensor. This sensor tells the computer engine temp and commands fuel delivery, accordingly. If you have an ohmmeter, we can supply you with a chart that shows what the resistance should be at varying temps.
Loren
SW Washington
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