problem with iat corrections

[nayr_one]

serial number s300-11283
94 integra gsr
p28
turbo, 1000cc injectors


alright i cant get the injectors to fire on this car, i have tested everything the only thing that i can think of is for some reason as you can see in the log i am getting an iat.c-100% read out i have everything zeroed out in the comp tables and for some reason im still having the same condition. i have tryed adding 99% cranking and overall trim to see if i can overrun the correction but no luck. i have never seen this before, any suggestions?

[nayr_one]

i find it hard to believe that i am the only person that has even had this issue. I can answer any questions about what we have and or have not tested

[nayr_one]

Seriously? You would think the people that designed the thing would be able to point ne in the right direction.

[cruizinmax]

Is your IAT connected?

[Spunkster]

The injectos are at about 8ms which is about 1% duty cycle.

If this is a completely cold start then you have a problem as your ECT is at 54 degrees and your IAT is at 123 degrees.

Make sure you do not have the IAT and the Evap Purge control plugs swapped.

[nayr_one]

it was 54 degrees in the shop that day and as i crank and crank on it trying stuff it warms up a tad. that log was taken with the iat disconnected when it is plugged in it does the same thing and reads ambient temps just fine. i have tryed two sensors, different injectors and another s300. i have tested continuity from the injectors all the way into the ecu and they have 12 volts and the resistor box is wired correctly. i can add overall trim and cranking trim and the duty stays at 1% no matter what i do thats why i think the iat correction is killing the injectors. the tables are zeroed out so thats why i cant figure out why this correction is even happening.

[Spunkster]

Try a different ECU as the one you are using may be faulty.

There is no way that the IAT will get to 123 with water temp so low unless you live in arizona in the summer.

[nayr_one]

it read 123 with the sensor unplugged and about 56 with it plugged in... i have tryed another ecu and i have also tryed this ecu in another car and it ran great and the logs didnt have any of this stuff going on.

[Spunkster]

Then the issue is specific to your car. I would check over all your wiring as something is not right.

[nayr_one]

most likely yes but what would cause the iat.c to make this compensation?

[Spunkster]

It is hard to say, but if the ECU works ok on a different vehcile you have narrowed the problem down to something that is only happening on this specific vehicle.

[cruizinmax]

That is normal for the IAT comp to show -100 when the car is not running. Mine does the same thing and my car starts fine. The ECU is calling for the injectors to fire (the 8ms duty cycle) if they are not I believe it to be a wiring problem. Have you confirmed the injectors are not firing with a noid light?