[Zajac1]

My advice is just to take your car out from that shop. They sound like know only how to change brakes and oil in Toyota corolla 2003. Your car has to run smooth even without proper tune. I did 2 3im swap on pre lci an lci 328's with no problems to tune. Till this day I'm running without tune cause I'm waiting for some good discount from BPC

[3002 tii]

Originally Posted by N52UNED

I'm relying on the shop ... I don't have a reader, but after this will be picking one up.

The shop stated that they did a checked for a vac leak ... and are positive that it isn't a vac leak.

They didn't check the coils. Since there wasn't a cylinder attached to the code ... they dismissed it the code as a generic code due to the 3IM. They will be checking the coils and for anything loose on Monday when the mechanic (who I believe is their lead mechanic) is back from the weekend.

Basically the car ran like crap, the shop figured the car would adapt after some driving it a bit (as did I). Also that the tune would sort the issues. They did take it for a quick run, and stated that outside the rough idle, once it goes ,,,, 'it goes like a raped ape' according to the shop manager.


I agree ... I believe it's an install issue ... unfortunately I'm rather skeptical they'll admit it. They seem to be in "it's nothing we did" mode. They're just too quick to blame the 3IM and not their work. Hopefully they find the issue. When I spoke to the manager this afternoon, inquiring if they did a reflash of my ECU, he did seem to want to have it work. He does seem to want to find the issue. Hopefully they prove to be competent enough to sort the issue.


.

These guys sound like buffoons. A faulty ignition coil will of course set a [cylinder] misfire code.

Only thing I can think of outside of install are the donor parts you sourced, I take it these are used? Also I think it was Hass who said it but some of these hoses are really brittle especially when you factor the donor car may likely be 10 years old.

[N52UNED]

Originally Posted by 3002 tii

These guys sound like buffoons. A faulty ignition coil will of course set a [cylinder] misfire code.

Only thing I can think of outside of install are the donor parts you sourced, I take it these are used? Also I think it was Hass who said it but some of these hoses are really brittle especially when you factor the donor car may likely be 10 years old.

Agreed.

For clarification he did state there was a cylinder misfire code thrown ... but since it didn't specifically mention which cylinder (ex Cylinder #3) they dismissed the thrown code.

So surprised they're this ignorant / arrogant about the misfire. When I mentioned to the manager, that other than a vac leak; perhaps a coil was loosened during the install ... that those are the 2 big things to check if there's an issue with the install .... I did see a glimmer of 'that's possible' in his look. After I listed the issues: rough idle, lurching a bit when goosed, stalling at stop lights ... and mentioned those are spark issues not intake issues .. he then stated the code didn't show which cylinder, that it would show a cylinder number if it was a particular coil, and finally that they do a lot of coil jobs. Then blamed the Vanos.


Yes the donor parts are used. The 3IM with DISA's from Bimmer World in GA. Regarding the hose ... the mechanic elected to use my hose, although they purportedly ordered a new one. They said it was in good condition for the number of years. My car has only ~ 37,500 miles ... not sure if that came into play.

I was a bit surprised they just didn't use the part they stated they ordered. Why not cover their ass and bill me for a part I already okay'd? IDK. Before the install I spoke to the mechanic and he insisted we get a new one, and that my car was 10 years old ... so it's best to install a new one since they get brittle over the years. I agreed to do it right the first time and better to be safe than sorry. He also looked over the intake and said he like the condition.







.

[N52UNED]

Originally Posted by hassmaschine

I would check to see if any coils have popped loose. Also, they can say whatever they like - but those plastic hoses are brittle and easy to break. One of them could be cracked, causing a vac leak. You can't even tell by looking at them because they are wrapped with heat tracing and insulation.

Another possibility is something like the MAF might not have been plugged back in. I would just have a look under the hood and see if there's anything obvious like that.

Finally, it's probably worth resetting your adaptations if they flashed the car. This will also require a couple restarts to reset error codes for throttle position but it should go back to normal quickly. I would recommend resetting them after flashing to the BPC tune as well.

The shop will probably not be helpful since it's the manifold isn't "stock" to that car - but the manifold itself won't really change how the N52 runs without flashing it.

The shop found the issue .... it was the throttle body.

The donor 3IM throttle body is by a different manufacturer ... One was Siemens the other Continental.


The 3IM donor came with a throttle body, but not knowing there was a difference in manufacturer; I asked the mechanic to use my stock one since my car only has 37K. Although the mechanic noticed the difference, he did what he was asked. I'm a bit disappointed that the mechanic didn't bring this to my attention, as I would've stated to use the donor just in case. Plus that would've been helpful for me to fully understand any and all differences. I guess the mechanic didn't think it was a going to be an issue ... but once the car came back ... that was the first thing he though it might be.


Regardless ... the car runs like it should. I only took it for a quick spin (no speed over 50 mph).


Although they did figure out the issue ... I'm a bit hesitant using them again though.


.

[3002 tii]

Different manufacturer throttle bodies isn't a big deal. The issue is he probably didn't replace the green rubber o-ring / gasket with a new one. And between the 2 tb's your old one has a better seal.

[NiNeTyOne]

Originally Posted by N52UNED

The shop found the issue .... it was the throttle body.

The donor 3IM throttle body is by a different manufacturer ... One was Siemens the other Continental.


The 3IM donor came with a throttle body, but not knowing there was a difference in manufacturer; I asked the mechanic to use my stock one since my car only has 37K. Although the mechanic noticed the difference, he did what he was asked. I'm a bit disappointed that the mechanic didn't bring this to my attention, as I would've stated to use the donor just in case. Plus that would've been helpful for me to fully understand any and all differences. I guess the mechanic didn't think it was a going to be an issue ... but once the car came back ... that was the first thing he though it might be.


Regardless ... the car runs like it should. I only took it for a quick spin (no speed over 50 mph).


Although they did figure out the issue ... I'm a bit hesitant using them again though.


.

Why the hell didn't they use the original throttle body? Sure, you want to replace the gaskets, buy why change the TB? Was it faulty?

[N52UNED]

Originally Posted by NiNeTyOne

Why the hell didn't they use the original throttle body? Sure, you want to replace the gaskets, buy why change the TB?

I asked the mechanic to use my "stock" TB instead of the TB that came with the "used" 3IM (it included DISAs and TB). I didn't know there was a difference in manufacturers (if that came into play as they purported or not) ... I was figuring since my stock 2007 TB has 37K on it (which I've put on 8K since I got it) ... vs a 2010 TB with an unknown amount of miles/wear, etc ... although it looked in good working order. The mechanic didn't question the request ... figuring it didn't matter either. (I'm under the impression that most folks did not replace their stock TBs either)

All I really know is during the quick run I did ... it started and idled fine twice. Drove like before the install. The shop manager stated the mechanic mentioned the TB manufacturer difference could be a cause ... and once they swapped them out it ran as it should. He also mentioned they didn't even look at the coils.

Frankly I don't know if the manufacturer really made a difference; if they got a better seal with the "used" TB or a better seal the second time in general ... Heck, or if they're just shining me on. Honestly I'm more along the lines that is was an install error rather than parts. BUT with BMW I don't rule out seemingly trivial differences from coming into play.

.

[hassmaschine]

I don't think the TB made any difference. Most likely, the gasket was leaking or something causing a vac leak.

[N52UNED]

Originally Posted by hassmaschine

I don't think the TB made any difference. Most likely, the gasket was leaking or something causing a vac leak.

Agreed

[Terraphantm]

For whatever it's worth, Continental bought Siemens' automotive division in late 2007. That probably accounts for the TB labeling difference, but the actual units are likely identical.