Hard to start when ambient temperature rises
03-12-2012, 06:23 PM
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Hard to start when ambient temperature rises
So i've got a 91 4runner, v6 that lives in the cold. In the morning, when it's below freezing, it starts right up and idles well. After it has been sitting in the sun all day like at work or school, I go to start it and it cranks and cranks and cranks. It's turning over but not catching. When it finally does catch, it sputters at about 200 RPM until I give it some gas. When it cranks like this, I get the smell of gas as well. The hotter it is outside, the harder it is to start. It's getting spark and it's getting fuel, new plugs and wires, the pick up coil, ignitor and cap all check out. Any suggestions???
P.S I am not very good with cars so the best way to describe something to me is with a colored picture if possible. . .
P.S I am not very good with cars so the best way to describe something to me is with a colored picture if possible. . .
03-13-2012, 10:42 AM
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Check the cold start injector and time switch:
http://personal.utulsa.edu/~nathan-b...29coldstar.pdf
http://personal.utulsa.edu/~nathan-b...ne/39colds.pdf
http://personal.utulsa.edu/~nathan-b...29coldstar.pdf
http://personal.utulsa.edu/~nathan-b...ne/39colds.pdf
03-13-2012, 04:19 PM
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Hey man the links aren't working, and if i'm looking at the right part, couldn't I just pop off the cold start injector harness and test it that way? In my repair manual, it tells me to do a lot of stuff that doesn't seem necessary, but i'm most likely wrong. . .
03-13-2012, 05:19 PM
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Sweet, way different than my manual but looks easier. I'll be giving that a try. . . Where is the time switch located?
I have also been leading to the ECT sensor as well? What do you think?
I have also been leading to the ECT sensor as well? What do you think?
03-13-2012, 05:40 PM
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Sounds to me like the switch is stuck causing the CSI to fire when it's warm, hence the hard warm starts and stong fuel smell. CSI could also be leaking.
For a super easy test, you could unplug the CSI and see if it's still hard to start when warm.
For a super easy test, you could unplug the CSI and see if it's still hard to start when warm.
Last edited by BMcEL; 03-13-2012 at 06:32 PM.
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03-13-2012, 05:51 PM
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Last edited by BMcEL; 03-13-2012 at 06:32 PM.
03-13-2012, 05:55 PM
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Brain fart, CSI = cold start injector, I know where that is and I popped the connector off and the problem persisted. Since the time switch and ECT sensor are next to each other, i'll give both of them a test while i'm there.
03-13-2012, 06:01 PM
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03-13-2012, 06:29 PM
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So something else just happened, well actually it happens quite a bit but it's hard to explain when it happens. So I just drove to the store and back and when pulling into the parking spot, going, you know, slow it was idling at 800-900 which is good IMO but it felt rough. It started sputtering. Same thing happened when I backed into my driveway, going slow, good RPMs but sputtering. . . To me that sounds like off timing, could timing be affecting my start problem?
03-13-2012, 06:40 PM
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Well i put a paperclip in the two and no codes, or are you saying put the paperclip in and pull the connector off of the CSI? Sorry, it's late and i'm spacy. . .
03-31-2012, 06:41 AM
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Hey guys, is the cold start injector the true scientific name? I came to the conclusion that mine is sticking open so I am in the process of looking for a new one. I cannot find a"cold start injector" anywhere. Is there another name for them or do I just need to look harder? I have found a couple used ones on eBay but I do not want a used one. Any suggestions?
03-31-2012, 07:03 AM
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Injector Assy, Cold Start Fuel
http://www.toyotapartseast.com/Page_...3522,3523,3524
http://www.utoyot8.com/Picture.aspx?...ccode=&ppName=
http://www.toyotapartseast.com/Page_...3522,3523,3524
http://www.utoyot8.com/Picture.aspx?...ccode=&ppName=
