New.... with a problem!! - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 01-30-2007, 02:28 AM
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New.... with a problem!!

Hi to all!

Iv been working on a project for the last two years. The original engine was a 323. I have now put in a 325 with a worked head

Gasflowed
278 Cam
Bigger VAlves

The motor turns and starts but as soon as you accelerate the engine dies.
Do i have to change the ECU box from 323 to 325.....is this the reason.

I really want to complete the project so any help would be great

Begining to think its a white elephantused:
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#2 (permalink) Old 01-30-2007, 09:35 PM
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What year motor did you put in?
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#3 (permalink) Old 01-30-2007, 09:49 PM
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if 325 then you need a 325 chip or whole ecu,
recommend you later models as on 1.3 Motronics, also know as # 173 and others.

stay away from early Motronic 1.1 also known as # 153 ecu's they give the worst idle.

cheers,
Frank
e30 parts

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#4 (permalink) Old 01-30-2007, 11:29 PM
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sounds like your fuel maps are totally off... which would make since if you didnt swap the ecu and all... its like telling a snowboarder to swim in a turniment... he'll A) make it, but barely, or B) just drown trying... listen to star marvin though... hes the true expert, and if its not ecu, then hes the man to talk to...
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