Cold start problem/hesitation

[drdma]

Car type: 1991 Celica, 3S-GE motor, 2000 ccm, ST182, M/T, W/O A/C.

Symptom: When starting a cold motor, the motor spins up and works ok for a 1-2 second (rpm is around 1700-2000), then stalls (with the symptom of misfire). After that it doesn't start anymore; when the ignition key is turned on, every time it spins up, hears a normal motor noise for a second, the crankling stops, and the motor stalls again. After an 1-2 hour, I can start the motor normally, the idle is ok, but when I press the gas pedal, the motor is bogging. When it is warm, everything is ok. After ignition, the rpm is around 1600-1800 for a second, the normalizes around 1200. After warming up the motor, it falls to 800-900. Everything seems to normal.

When starting the cold motor, it doesn't react for the gas pedal. It stalls.

My questions: Is this model has EGR valve? Is the fuel evaporative system? What are the differences between the 3S-GTE and the 3S-GE, because my repair manuals are for the MR2?

The air filter is clean, fuel pressure is ok, no diagnostic code stored in computer, system seems to be ok.

Any hint? Whant can I check? I someone has the Haynes repair manual, please, inform me: is there any infos about the vacuum system/hoses/sensors?

Thanks!

[Deep]

Depends where you are for the egr, JDM cars don't have one and most Japan imports into other parts of Asia probably don't either. Have you checked voltage to the cold start injector?

[drdma]

I've disconnected the cold start injector for testing purposes, because it operates only in the temperature range < 10 C. No, here is about 20 C. The There was no difference. The voltage is not checked, I must to find first: where is the cold start injector time switch mounted?

Here, You can find some pics of my engine. Check them out, and if You know, give me the names of the the designated parts.

http://www.thurzol.org.yu/~drdma/post-22-1062578765.jpg
http://www.thurzol.org.yu/~drdma/post-22-1062587517.jpg
http://www.thurzol.org.yu/~drdma/post-22-1062579070.jpg
http://www.thurzol.org.yu/~drdma/post-22-1062579001.jpg
http://www.thurzol.org.yu/~drdma/post-22-1062578903.jpg

My engine is for Switzerland (I think); there are no catalytic converter, no EGR and no fuel evaporative system. But this engine has T-VIS system, which is, when its closed, makes a knocking noise. It opens fully about 4000-5000 RPM. So, the actuator operates and the VSV is operating.

I'm not checked the fuel pressure for now. I'll also check the compression and the timing.

Any other hint?

[drdma]

The problem is fixed: it was a low pressure fuel pump. Replaced.