Thread: Swap= not running, misfire

got a 98, blew the motor and got an 03.. swap everything over that i needed to run..also installed headers, turn key and engine starts revs to 2500 and then dies...if you hold the pedal down to about 1100 rpms, missing like a mofo... now i was thinking maybe there was a vac leak, but i ruled it out... checked spark=good injectors=good the only thing i can think of is crank sensor or cam sensor....unless there is something im missing here or cant think of...someone please chim in and help out!

i was doing some thinking, if im right the 03 model is a genv and my old motor was a genIII now would the LIM on the genv motor be different then a GenIII LIM And i bolted my GenIII blower on, and thus would be making it run like crap?

i tryed both coils, used my old coils that i know for a fact worked.. and still no change... pretty much you start the car and it dies rightaway, starts then dies.. but if you hold the gas pedal down when you start the car it stays running, but has a very bad misfire...but let go and the car dies... pulled the maf and start it, it idles at 3000 pulled the tps idles at 3000. ill try and reset the ecm...but lets say that does not fix the problem, what am i left with? crank and cam sensor?

yes i have the 98 pcm...the 03 was different and didnt feel like rewiring it when its not needed to do so.... the only thing i swap out was the blower to my 98 blower.. the new one had a drive by wire throttle bodie and i cant use that... other then that all i did was hook up all the sensors and mount the blower and i was done. and yes i put a new gasket on. didnt have to take the throttle body off to take the blower off, you dont have to. and i know the throttle gasket is fine. it worked fine before it blew.
and how do you get a leak with a new blower gasket, and im sure you cant mount it wrong, unless your just plain stupid! so lets hear some more thoughts!

HA! ill send you my lim, and you send me the gen v. done.

If you look above on my other post, I typed 03 mistake, But did ask if the LIM of a genv be different from a genIII!! and that I bolted a genIII blower and that's my problem! All I get is there the same!! So if there indeed different and I didn't notice it, now on to gettine a throttle body for a cable and a lq4 maf...now where isthe write up for the maf and the map sensor? And sorry do not wish to sell the genv lim at this time.. Thanks for the help guys cuz I was stumped!

ok well from what ive gathered. he has a GenV LIM and a Gen3 blower. there is your first problem and the massive vac leak because the LIM is 1/2 inch longer opening for the blower. now onto problem 2 you need a regular throttle body that is not DBW. why are you running an LQ4 maf for? use your throttle body from the old engine. as blue stated you also need a tune for the LQ4 maf. let us know what is going on

Ok so your saying I can bolt on a throttle body from a genIII that has the maf already in it, and is a three bolt pattern to a genv blower that has a 4bolt pattern. Sorry I don't see that happening! I'm talking about getting a throttle body that is for a cable type not DBW so when I do that, what am I gonna do about a maf? So I was thinking ls1 type maf. Cuz that's the only way I see it working out! Unless there is some other way to do it. Sorry about my typing, I'm doing this all from my phone And it has a mind of it's own!