Brick In Hand

Ok folks. My son purchased a 94 Toyota 4wd, 22re, 5spd in Nov. 2010. I have been driving it all winter with no problems at all (I live in W.Va.). A few weeks ago it wouldn't start on a cold morning but that evening it fired up immediately without even popping the hood.
I have replaced the in tank fuel pump,filters, rotor button, cold start injector, and the cold start timing switch. I also jumper tested the ECU and it is good. But it still will not start on a cold morning. I can open the hood and allow the sun to hit the engine for 30 mins and it hits on the first crank and away I go.
Also, I can smell gas like it is flooded if I crank it over for a few minutes in the mornings when it won't start. Then when it finaly does try to start (around noon when it warms up) it takes it a while to "catch up" or something and smokes for a few seconds. It runs a little rough while driving until it warms up like it doesn't want to take much throttle or like it will miss when I give it too much throttle.

I replaced the cold start timing switch this morning thinking for sure it would be the fix..my spirits sank when it didn't happen. Fuel is good, spark is good, I haven't chkd timing but that wouldn't be an intermittent problem, would it?

Anyway, I have read so many threads here and have tried many of the suggestions but I wanted a case specific post..so here it is. Thx in advance for your insights.
*EDIT: I forgot to mention it is fuel injected.

sebastianholmes

okay you have fuel and you have spark, so youre clearly not getting air. check your IACV

swampfox

You might check the temp sending unit for the ecu , if it bad the truck will flood . I had this happen on a chevy I owned.

Lawman65

How about your coolant level. If level is too low the sensors won't give an accurate reading to the ECU.

RPlais12

Try putting a drop light next to the kick panel where the ECU is located and see if it will start after 30 minutes while its cold. I had a buddy who had to do that because a power wire to the ECU had a touchy connection. A guy had to run him a new wire, Said it was one little strange wire,

scope103

You know, you might be getting too much cold start injection. This seems like a long-shot (since you replaced the timer and the injector), but smelling fuel, and having to run it up once it starts, sounds a little like its flooded.

But it might be worth a quick check. When it's cold, crank it for 10 seconds. Pull off the electrical connector to the cold start injector, and try again. If it starts (even if it only runs for 60 seconds), you might be onto something.

The MAN

I would look into a bad coolant sensor too.. check the resistance on it... sometimes old sensors "shifts" out of spec and the ECU may think it's 20 degrees when it's really 60, flooding the engine!

sebastianholmes

he has a lack of air, everythign mentioned up there ^^^ are things that can cause it. test things before you just throw parts at a truck.

The MAN

if he has a lack of air, don't you think his face will be turning blue?

like I said... the coolant sensor has a lot to do with how much fuel the ECU decides to use for cold starting... if the sensor is screwed up, the ECU will think it needs more fuel than it needs and the engine gets flooded

even with a bad IAC and everything else is ok, the engine should run if you have crack the throttle open a bit...

Sportsmanphil

For kicks and giggles, bump the air intake off the throttle body just a small bit and shoot some starter fluid in there while cranking.

The MAN

yes, but he's getting fuel (flooding from what it sounds like)... so I don't think that's going to do much except make things worse

vital22re

iTrader: (2)

I agree with the coolant temp sensor. Check resistance. Pull the plugs and see how they look, I wonder if you have leaky injectors. Lack of air would mean he's got a squirrel in the intake. Iac deals with the idle when hot or cold, not if it runs cold or hot. How does the coolant look? If it hasn't been flushed or replaced in a loooooooong time you could get build up around the sensor causing false readings.

fjfodee

Man, I wish the OP would have followed up on this. I'm having the exact same issue.