Problem....

i would check your coolant temp sender ( ohm it out ) ill get back to ya on the spec. Or could be an iac problem(idle air control) does it still have high idle when cold? if so iac is prob functioning.

 

welcome to the site im a newbie as well...but ive been working on toyotas for 15 years.

 

sorry tried adding the specs via image couldnt figure out how ....if you could guide me on how to upload an image i could help u

 

you need to add them using an IMG code

 

you have to upload your pics via an external site. then use the img html code to put them on here.

 

ok thanx i had a graph to share about the temp vs ohm reading on that temp sender for ecu , i have to get back to work but i will try to post it within a couple of hours.....and any cheapie meter will do the trick but i love my fluke ...money well spent.

 

could also be cold start time switch those were very common testing those is virtually the same but you can actually pull the cold start inj and watch it to see if it is over active it should only spray for 1 to 2 secs when dead cold on a warm start i believe they arenot needed thus reving high helps clean out the unneeded fuel. On a cold engine in cold temps engines like lots of fuel thats why summer time or hotter weather your problem gets worse....of course this is just pattern failures and common problems im sharing hard to diag a car i cant see....but let me know if you need any specs ill just type them manually i gave up trying to up load pics today..

 

^Are you referring to the fan switch sensor? On the 3SGE, it's on mounted on the T-stat housing:

 

The coolant sender is on the water neck coming off the cylinder head.



View from underneath:

 

coolant temp sender:
bottom shiny one with blue plug. it could be on anywhere around the coolant neck as it differs on each car:

 

-the coolant temp sender is only linked to the gauge, so if your gauge is incorrect this would be the one to replace.

-for starting problems like stated above, youd want to replace the start time injector switch. ricks is an 89 so if you have an 86,87,88 the plug will be square. the start time injection switch controls the duration of time that the cold start injector is used and when. it determines this by monitoring the coolant temp.

-if the switch is bad or reading an incorrect temperature, the csi system will not work properly. this will show up more dramatically in warmer temps since the coolant will take longer to cool and "reset" the system to a temp where the csi will fire or give a proper volume.

:thumbsup:

 

30 to 50 ohms below 50 degrees f 70 to 90 ohms above 77 degrees f and the brown square sensor 2 pin is time switch and the green 2 pin is the coolant sender for computer the one pin as stated above is for guage....good luck i hope this helps

 

By golly this is clever stuff dudes, I had no idea these sensors on the coolant neck could affect so many 2nd and 3rd 'operations'......... as I look in my Haynes repair manual I can now see how these sensors work........... if I start having these issues I'll now know where to start looking............ I reckon spiedr is close to solving his starting probs :thumbsup: