Asha'man

My truck used to fire right up after a crank or two, even when cold, but lately it takes some serious cranking and usually a second try before it catches. After it's hot it starts up just fine. I seem to remember reading about a cold-start injector on these rigs - is it possible that this is going out on mine? What else could be causing this? I'm a bit worried as cooler weather is becoming the norm so hopefully it's nothing major.

Brian

mt_goat

The cold start injector was my first guess, check the wire going to it. This is for a 93 but your's may be similar http://personal.utulsa.edu/~nathan-b...sm/engine.html

4Hummer

The cold start injector is controlled by the cold start injector time switch, and is ground switched.

On my truck it was the switch that failed, not the injector, (Toyota wanted close to $200.00 cdn for it)

Simple fix, Ran a ground switch from the cab to the CSI Wire harness,

Also The CSI only fires when the starter is engaged so there are no worries about leaving the Switch in the on postion.

rdlsz24

A couple weeks ago the plug connected to my cold start injector sensor came loose and my truck became hard to start even though it was hot outside. It ran like crap before it warmed up too. Once I made sure the connection was sound, it started and ran like normal again.

On the 22RE, the sensor is on the front of the block to the left of the coolant sensor. I made a box around it in this picture:


Rob

Asha'man

I'll try to take a look tomorrow.

Brian

ToyYoda

I have the same problem. I'm going to check into the switch, sensor and connector? How many things are involved with cold starting?


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EDIT: I have found the cold start sensor and injector but can't seem to find the time switch. Anyone know where it's located?

shredder

bump,
For more info on how you did this

crackerjack

Me too... just got trk out of shop for electric fan install. Mech said cold start was staying on all the time. He suggested running switch to cab. So it's just a timed switch? not controlled by anything?

crackerjack

This implies that CSI fires "everytime" engine is cranked so why is it called a "cold" start injector"

NE4runner

Check the wires going into the cold start switch had to splice in a new one. I also bought a 87 cold start valve switch for like $90.00 buck at rockauto.com Locally they wanted like $160-$170.

crackerjack

Discovered problem...took cover off air flow meter there is a switch at end of flapper that controls fuel pump it was broken off so that fuel pump is on all the time with key on... so now I guess I'm in the market for a flow meter

Asha'man

Well, my truck finally quit starting entirely. It came about 2 in the morning at the train station, so I was lucky my friend drove me back to my rig (she took me home, truck is still there). It'll crank all day long but won't catch, and stinks of fuel after just a few cranks. I guess I'll try to check the connections at the CSI and the switch, see if anything obvious pops up.

Is it possible that the CSI is sticking on and dumping fuel into the intake, causing the instant-flood condition? I guess I could just pull power off it to see.

Sucks, I thought Toyotas were always supposed to start.

Brian

89-4Runner

another thing you want to check is your pressure fuel lines for any sign of a leak. i had two develop small leaks which made it harder to start, the fuel pressure in the line would drop while it was sitting, and took a couple of attempts to build up the pressure to fire the engine. this went on for a couple of weeks before the leak was noticeable and could be found - dripping gasoline near my fuel filter... this could be why you smell fuel...

Asha'man

So between work and school, I had not had a chance to even take a cursory look around the engine bay since Tuesday, and when it died Tuesday it was dark and cold so I didn't spend much time there. I went down today expecting to spend some time and probably money replacing parts. As I was checking connections initially, I noticed that the coil wire had come off the coil. D'OH! Cranked right up first time.

Cliff's notes: Check the basics immediately.

crackerjack

been there done that, I think the engine really rockinrolls while starting and my coil to distributer wire was too short
I took a screw driver and spread the plug in part so they held tighter

sleestak240

Might also want to check your idle air valve if you are running a 22R-E. I spent several weekends messing with the cold start system on my '87 and finally fixed it by readjusting the idle air valve opening amount.

shredder

What is the correct adjustment on the idle air valve. How many turns out ?

Thanks,
shredder