dasoftest

Hey guys my a/f ratio is at like 10.2 when I drive on the highway. I just swapped the motor due to a hole in the block caused by my axle. My mechanic said it's a turbo engine and not supercharged my like old one. So the lnf not the lsj. Is there any way I could tell. And if he's right would it effect my a/f. And could this be a reason why my car won't start until the 10th crank?

yellowsupercharged06

iTrader: (3)

Ohhh boy im jus going to wish you good luck with it all.

Sl0wbaltSS

Does lnf/ldk even fit in a lsj??

dasoftest

Why? I'm new to the cobalt lol. Sorry if I don't know.

Snail_SS

iTrader: (3)

Well i have a lnf and i dont run that afr. You should be close to 14.7 but then again it should be fluctuating from lean to rich everytime

southal cobalt

iTrader: (3)

man, we are gonna need more detail. could be a million things. pictures of the engine in your car currently. was the ecu changed out?

you should never be cruising that rich though. i cant believe a mechanic would switch out to an lnf and hand you your car back. one member on here did a lnf swap into an lsj, and he had lots of problems to overcome

blueLNFftw

iTrader: (16)

Post Pics of the motor.

Mechanic could have figured out the b207r swap.

If he put an LNF motor in the car wouldn't be driving at all. It's far from a straight swap and a random mechanic just figuring out.

southal cobalt

iTrader: (3)

could even just be an lnf block, right? i may be wrong, but i think the blocks are interchangeable. as stated pics and check engine light codes will be needed

KMO43

Bluelighting is running a Gen 3 LDK bottom end with a lsj head. There are mods you have to do to make it work in the LSJ like putting in the correct reluctor wheel and I believe that the dipstick is different. The piston design is totally different but Blue made over 400hp on E47 with the S252et.

The A/F ratio is off possibly because of the tune did you go back to a stock ECU but have larger injectors?

dasoftest

Ok then yeah its gotta be an lsj then. I put in the same ecu that was in it before i jacked my old engine up. It never ran at 10.2 usually around 14.5 or 14.6 idk what could be different. also takes multiple cranks to get it started. could this be related?

will post pics tomorrow. also cel is on then flashes then stays on then flashes and keeps doing this. took it too autozone and their code reader wasnt getting anything. same results at advanced auto, even with my code reader.

blueLNFftw

iTrader: (16)

Where are you in Florida?
If you are near Flager County/Palm Coast then you can come over and we can get it together. I already have one SS on jack stands at my house, what is another? lol

blueLNFftw

iTrader: (16)

This is what I mean though, you have to modify the bottom end to make it work. I highly doubt that joe-shmo mechanic figured this out.

CobaltSS 16

iTrader: (3)

post pics of engine bay

KMO43

Check the for a leak that can throw the ecu off and run rich

tomj77

iTrader: (2)

To answer ur first question, no regardless what motor ud have in the car, u should not be running 10.2 or whatever it was a/f at cruise. It should be 14.7ish. Ur a/f is pig rich. Did this sale mech put the motor in the car? And this is what he is telling u or what's the story ?

dasoftest

It's actually a friend if mine. He works for BMW and is a mechanic there. Idk what I would need to check but I know something is definitely wrong. Anyone got any ideas where to start. It's annoying as hell to try to get it started.

And I live in port saint Lucie Florida.

tomj77

iTrader: (2)

First thing first, go out to ur car and take a pic of the engine and post it here. That will start us off helping u.

blueLNFftw

iTrader: (16)

Bit of a drive. Right around 3 hours.
Try and help you the best I can online unless you wanna bring it up here.

Shanedude

The suspense for pictures is killing people. Please post!

KMO43

first I'd check for a boost leak

dasoftest

I'll post a pic when I get home from work. Can't post one on my phone. And no boost leak. Checked it already. any help is greatly appreciated.

Shanedude

Should be any minute now...

dasoftest

Hahaha. Sorry guys been busy with college and work. Let's see if I can figure out how to do this.

<a href='https://i.imgur.com/hU3gPVg' title=''><img src='https://i.imgur.com/hU3gPVg.jpg' alt='' title='Hosted by imgur.com' /></a>

http://imgur.com/hU3gPVg

I tried two different things so hopefully this works.

CobaltSS 16

iTrader: (3)

yea you still have an lsj lol

tomj77

iTrader: (2)

lol yes what ^ said. and might I add ur mechanic should be fired or is not a real mechanic and knows little about cars if he thinks that's turbo'd. never take ur car to that guy again, please. If u cant figure this out, take ur car to a REAL mechanic.