Bme e3o turbo jetronic or metrnic system - BMW Forum -

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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post #1 of 3 (permalink) Old 08-04-2009, 07:48 PM Thread Starter
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Bme e3o turbo jetronic or metrnic system

hi to all users and to everyone who likes the e30
i installed turbo on my e30 a with jetronic system but i had some problem the car after 4000 rpm cuts off and some explosions from the exhaust , i changed to motronic system i made a test drive with metronic but i felt the car is not power as the jetroni so pls can any one help me
1- why on jetronic system the car cuts off after 4000 rps and i installed bigger injectors and frp
2- which is better for turbo jetronic or metronnic
thks all for u help i really appreciate that
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post #2 of 3 (permalink) Old 08-15-2009, 10:55 PM
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Considering your engine engine and electrical problems are in good order, explosions(backfiring) is ALWAYS an indication of wrong air-to-fuel ratio. The cut-off at 4000rpm to my mind is simply fuel starvation at higher rpm's. Imagine a swoosh of extra air from the turbo where there is just too much air compared to gas injection. Engine will burble out.

In practice, simply putting a turbo on top of an engine WILL NOT WORK unless mods are made to the compression ratio etc.... If I remember correctly there are several topics regarding turbo modifications in this forum if you will take the time to research.

Additionally, you cannot exchange Jetronic & Motronic parts where it is no cross reference specified. They are completely different systems and the sensors which act as inputs to the processor have different parameters & specs.


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post #3 of 3 (permalink) Old 11-04-2009, 01:39 AM
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save yourself the headache and get megasquirt!!!! 400$ problem solved....corectly
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