AAN ECU eprom for the boost?

[jevrem]

Cam someone tell me on what side of a ECU is locate the boost eprom.
I know there is 2 eproms one is for motor and one is for boost.
The ECU is from urs4 AAN 1992.

[Pirvu Eugen]

Boost is on the side with the pressure sensor.
Hope this helps!

[jevrem]

Yes, thank you!

[newt]

87C257 Will be the one you're looking for.

[UrS4boy]

Cam someone tell me on what side of a ECU is locate the boost eprom. I know there is 2 eproms one is for motor and one is for boost.
The ECU is from urs4 AAN 1992.

As suggested, it's on the side with the Manifold Absolute Pressure (MAP) pressure gauge, which looks like this:



Source: http://www.sjmautotechnik.com/troubl.../20vpress.html

[jevrem]

I have a problem with some MRC chips I bought.
I put MRC chips in my ECU. But the car would't start. I hear the motor trying to star and i smell a gasoline, but still the motor would't start. When i put back my old chips the car start OK. Before i removed the ecu from a car i disconect the batery. Is there some other procedure how to chaning the eproms.
I double check the pins and the side of the eproms and everything is set Ok.
This is the picture of my ecu.
Does someone have any idea what can be the problem. Does I have to wait sometime with batery disconect to reset the ecu or else?

[Jas11n]

There is a "v" notch on the end of each chip, you did insert them the correct way round?

[porkkis]

AAN 551A is equipped with different type boost chips. Extremely rare 87c64 versus just rare 87c257.

[Ross]

As suggested, make sure the EPROM is the correct way round, make sure pins aren't bent etc so it seats properly. It should fire up immediately after the chips are fitted. Otherwise I'd suggest there is an issue, sure MRC would send out a replacement if you returned them.

[jevrem]

Yes i did. I put "V" notch like i put when i insert the stock chips. and the motor is starting with stock chips.

[jevrem]

i will send you the picture with eproms

[jevrem]

[20Vcqdriver]

Looks as though the fuel and boost chips need swapping over. Boost chip should be next to MAP sensor as already stated...

[jevrem]

I delete this picture because i did put eproms just for picturing. And when i look at picture i have seen i made a mistake. I will put the picture with corect place of the boost and fuel chips. When i try to start the engine the chips for boost and fuel was in corect place. Boost at the side where the MAp sensor is.

[jevrem]

This is the picture with MRC chips with the wright place of boost and fuel chips.