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Old 05-26-2013, 11:03 PM   #1
M_South_Afrikanna
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engine swap major problems help

Alright so I did an engine swap and based on what info I found, all I needed was a maf and the swap would work. but Im getting misfire errors and stuff. so far I've I figuared I will have to change out the tubing from the throttle body, and the air intake to the bigger one. I was wondering does the 330 motor have a bigger injectors? also I was told the motor should run without the flash just not optimally. I really need to get this thing running again.
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Old 05-26-2013, 11:36 PM   #2
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In order for anyone here to be able to help you, we need to know what you started with and what you swapped in. I'm guessing an M54B25 to an M54B30, but you never said exactly what.
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Old 05-27-2013, 09:24 AM   #3
M_South_Afrikanna
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sorry yes thats what i swapped with. Im thinking that the problem was my intake manifold. since we put the 325 manifold on the 330. yah dumb mistake. so we're swapping the 330 one on and we're gonna see if that fixes the problem
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Old 05-27-2013, 09:55 AM   #4
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I don't think the issue is with the intakes, if the maf's were not the same I don't think they can just interchange. I'm sure it can't be just a direct engine swap but I may be wrong. It'll be nice to here the outcome for future reference.
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Old 05-27-2013, 10:00 AM   #5
M_South_Afrikanna
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supposedly it is. i need to get hold of someone who has done this before so I can talk to them but supposedly it is. well actually it is ive got everything in and it does start and idle. just not properly. im thinking its the injectors on the manifold and the shorter ram intake the manifold on the 330 has compared to 325.
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Old 05-27-2013, 09:33 PM   #6
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There are a lot of people who swap their 325 intakes for 330 intakes for more power. I don't think it'd affect the motor running wise, to have a 330 with a 325 intake maybe a couple ponies less but nothing you'd notice. You may check vacuum hoses or something might not have been plugged in from the swap but I don't think the intake is your issue. I have no idea about the injectors though. What codes is it throwing?
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Old 05-27-2013, 11:09 PM   #7
M_South_Afrikanna
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will its not the intake its the manifold. where the injectors go. thats the part im swapping out. I put the 325 manifold with injectors on the 330 so im thinking thats where the problem is coming from. so im changing the whole thing for the one that came with the motor. just means a lot of unplugging and replugging. fml
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Old 05-28-2013, 06:02 AM   #8
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that's only the beginning. lol. you have only touched base on mechanical complications. wait until the electronics and software mess with you. are you using the ecu from the 330?
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Old 05-28-2013, 06:16 AM   #9
DarkSyde330ci
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Re: engine swap major problems help

These are almost the exact same engine I wouldn't think there would be any wiring conversion for a 330 motor. Dme and injectors not so sure

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Old 05-28-2013, 08:46 AM   #10
M_South_Afrikanna
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darksyde is right actually numbaone. you dont need to swap the dme for it to work with the motor. actually you dont even have to flash the dme to 330. its a loss of responsiveness but the motor will still run.
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Old 05-28-2013, 08:48 AM   #11
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like I posted originally i did have it running just a rough idle and an error code throwback. ill post up if the injectors are gonna be the problem. though its gonna be a week before i get to it i dont have time during the week
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Old 05-28-2013, 08:53 AM   #12
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What are the actual codes? Misfires with a bad coil or two can cause rough idle. Post the specific codes and I think more people can help.
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Old 05-28-2013, 09:15 AM   #13
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The 3.0L needs 20% more air and 20% more fuel at WOT than the 2.5L. So, you should put on the 330 intake manifold and fuel injectors. At lower throttle positions, I would assume that the 2.5L injectors and manifold can keep up. You probably just have a massive vacuum leak from something you forgot to connect.
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Old 05-28-2013, 12:43 PM   #14
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right.my bad,brain fart. question. what year bmw did motor come from
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Old 05-29-2013, 09:29 AM   #15
M_South_Afrikanna
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Quote:
Originally Posted by NumbaOneNewb View Post
right.my bad,brain fart. question. what year bmw did motor come from
lol its cool. the engine is the same year as the car though. I know that there is a difference between every motor after feb 03 and before tht date so I got the same year just to make sure it compatiable

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Originally Posted by WDE46 View Post
The 3.0L needs 20% more air and 20% more fuel at WOT than the 2.5L. So, you should put on the 330 intake manifold and fuel injectors. At lower throttle positions, I would assume that the 2.5L injectors and manifold can keep up. You probably just have a massive vacuum leak from something you forgot to connect.
yah I was thinking that. were gonna check it this weekend with some break cleaner and see if this the problem. that along with checking all the connections at the dme. and maybe swapping the injectors. though i found out from a fellow fanatic that did the swap that he is running all stock 325 manifold, intake, and injectors on his 330 swap with no problems or fault codes. so im thinking my problem is something else
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Old 05-29-2013, 10:41 AM   #16
WDE46
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I'm kind of curious as to why your 330 engine came without the intake manifold and TB. Did someone beat you to it?
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Old 05-29-2013, 01:37 PM   #17
M_South_Afrikanna
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actually it did come with it. but im not installing it until i buy the air intake whch is a different size to the 325 air intake and costs a bit of cash. but if things dont work out i might have to go ahead and pay the cash and spend the time swapping the whole manifold over
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