dutchboy

Recently,about a month ago. Here in Pennsylvania the temp. started to get rather cold outside. Since this temp. change,my Yota 4runner (3.0) has been taking a lot longer to start. Long cranking before it fires. Long cranking as in almost a full minute. After about 30 seconds,it starts chugging(trying to fire,then it fires. When it finally does start it stumbles a bit for a few sec's,then hi idles fine and from their on it runs and starts fine.
It's always the 1st fire of the day,no matter what time of the day,it does this. I changed the fuel filter a few days ago,the starter is new 1 month ago. The battery tested fine ad is cranking strong. Just takes forever before it fires.
If tried turing the key on just to the run posoition several times,"thinking" it needs primed more,but doesn't help any.
Is their some sort of sensor somewhere that tells the brain box it's colder out and to supply more fuel,that might be not working proprly?
Is their something I'm missing?
Doesn't matter if it's below freezing or not. It's done this ,long crank even when it was around 40-45 degreees out.
I've owned the rig 5 years now and this is the first it's ever done this.
I hope to solve this soon,before it either kills the battery or wipes out my new starter.
Any help is greatly appreciated. Thanx all!
Dutch

a4runnerfreak

Check your Cold Start Injector, and the Cold Start Injector Time Switch. Had this problem on my old '91 v6 truck

toyota4x4907

Wow...40-45 degrees? Thats warm for it to not want to start! My 22re takes like 30 seconds to start from sitting over night if its below 0. Maybe try a different oil viscosity? Like 0x-30 instead of 5w-30. maybe invest in an oil pan and block heater? Perhaps the cold start injector isn't spraying enough fuel...? Just throwing ideas out there...

dutchboy

Cold Start Injeector. That was mentioned to me a few days ago as well. Now for the tricky question?
Where is it on the 3vze engine? Might you know "a4runnerfreak"?
Along with the Cold Start Injector Time Switch location? I don't mean to sound like a newb,but Cold Start Injector and it Time switch are all new to me.
Dutch

1styota4X4

not sure of switch location but the cold start is on the passenger side of the upper intake and has a metal fuel line going to it Kinda in the middle. It has a plug that looks like an injector connector....hope this helps

a4runnerfreak

It's where 1styota said, just above where the EGR pipe bolts to the intake. Thats the CSI. As for the time switch, it is on the backside of the engine, on the left side (near the firewall) next to the Water Temp Switch. There are only 2 switches there, right next to each other. The switch closer to the passenger side of the engine bay is the CSI Time switch.

dutchboy

Im in the process of the download now. if I cant find or figure it out. I'll get back to ya and ask ya to scan for me,but lemme see how I make out with the download. Thanx for the tip!
:>)

abecedarian

cold start injector:
http://personal.utulsa.edu/~nathan-b...88coldstar.pdf
cold start injector time switch:
http://personal.utulsa.edu/~nathan-b...ne/97colds.pdf

a4runnerfreak

Thanks Abe. I scanned the location from my FSM anyways....the red line shows the CSI Time Switch

dutchboy

Thanx abe...
Abe...the diagrams you linked,are they for the 1990 3vze? Just double checkin...

SOMETHING I FORGOT TO MENTION...I recently bypassed my ignition switch,to a starter button,direct to the battery and to the starter.
Could this be a reason why Im having cold start problems? I noticed in the diagram that abe linked,it shows the cold start injetcor and time switch wired in with the ignition switch. That's what reminded me of the ignition switch bypass.
Reason for the bypass was,the switch "we think" went bad as I was having to jump my rig constantly,before and after a starter replacement. Figured a push button switch was cheaper than the ignition switch.
If this is the case,of my cold start problem...would I be correct in thinking that if I just replace the original key ignition switch,my cold start problem would go away and return to normal starting?

Now that I think about it,the cold start issue came about right after the starter button install.

???

abecedarian

actually a 93, but the test procedures are the same.

and absolutely your ignition switch mod is probably the cause.

abecedarian

if you check the starter wire for voltage when you turn the key, and get it, then you may be able to wire in a relay that the key triggers, then have the relay apply battery voltage to the starter. alternatively, you may be able to wire your pushbutton to the ignition switch wiring that you've bypassed... applying voltage through the 'back-door' so to speak.

dutchboy

Ok...makes sense. Im gonna price a new key switch.
To be continued...
Thank you for your knowledge!!!

a4runnerfreak

Duh! I forgot all 'bout your previous ignition problems, and that you were going to try that suggestion. Ok, feel dumb now, gonna go sit in a corner........lol
thanks for showin me up, Abe

BrownsfaninMN

See thread "Cold start 1991 P/U" on previous page (likek page 3), your problem is pretty common, especially now that it's getting colder outside.