90datech

me and my boy just did a swap on a 97ex. we swap in a 94 ls motor. we did the harness the way it needs to be done to run with the obd1 engine, also we got the jumper harness for obd2a to obd1 for the ECU. now the problem we are having is that the engine wont start, and when it does, it runs rough and stalls out when u hit the gas. now when we spray starter fluid in it which i know you shouldn't do the car will start up and will idle fine. the only thing is that it throws a check engine light and wont rev pass 4000 rpm. timing has been check, dizzy, and the wiring on the harness. anybody know what the problem may be????

ltrkstr2k

bump...... this swap is starting to stress me out too

Syndacate

Sounds like it's not firing right. Good plugs, wires, cap, and rotor? Timing is right? Dizzy timing is right?

PS:
What CEL is it throwing - go check that first, it's probably a good indication of what could be wrong.

Bakeoff

sounds like you wired teh dizzy wrong... Check back over the wiring.

97Ej6mike

Sounds dizzy related. Make sure all your grounds and connections are secure.

ltrkstr2k

we have been over all the wiring at least 3 times wire for wire. when you do get it started the w/ the fluid its ok to drive no hesitations or anything just wont rev past 4k. We tried another dizzy in it and put this dizzy in another ls and it worked fine

fmrprojects

do you have the right firing order? is the map sensor and tps plug switched? i did this before and the motor didnt rev pass 1200rpms

ltrkstr2k

yeah the firing order is correct and both the map and tps sensors are plugged in too. this has got me stuck

ltrkstr2k

bump for some help

Jax75z28

isnt there a wire you have to jump on ur ecu plug

http://www.ff-squad.com/tech/w...8.jpg

90datech

bump for help

MonkeyMagic

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fmrprojects &raquo;</TD></TR><TR><TD CLASS="quote">do you have the right firing order? is the map sensor and tps plug switched? i did this before and the motor didnt rev pass 1200rpms</TD></TR></TABLE>

also alot of people get the intake air temps confused... because of the extra in obd2 which is not used obd 1... so many headaches i just woke up or i'd explain more

but start with the cel light and let us know... if theres no cel

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fmrprojects &raquo;</TD></TR><TR><TD CLASS="quote"> is the map sensor and tps plug switched? i did this before and the motor didnt rev pass 1200rpms</TD></TR></TABLE>

ltrkstr2k

we tried it both ways with the IAT in the intake arm and now its in the manifold. I been reading alot about the O2 sensor could that make it not start though?

90datech

yeah the firing order is good, so is the tsp and map sensor..... anymore ideals on what it could be?

ltrkstr2k

morning bump i need this figured out by the weekend

tei344

I'm a little interested too. My brother swapped a new motor into his prelude. not sure the specs but his wouldn't rev over 4 either. ran started and idled fine. just would go over 4. seemed to me the gas was cutting out or something, kinda lie a rev limiter, but no matter what we did we couldn't figurer it out. long story short we will never figure it out because he blew a timing belt and that wrecked the head, so now we are going to get a new enging and pop it in this spring.

civic_coupe_585

its probably not this but do you know if the ecu is for an automatic? that may be the case. but i dont think that would cause it not to run. so idk just my 2 cents.

90datech

na its a 5 speed ecu, we had the whole car to take parts off of. this is gona take all the help we can get...

ltrkstr2k

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90datech &raquo;</TD></TR><TR><TD CLASS="quote">na its a 5 speed ecu, this is gona take all the help we can get...</TD></TR></TABLE>

Amen its killing me

90datech

bump for help

ltrkstr2k

ttt

EFLS89

i had a DC and had a motor swap done, and it wouldnt go past 4k, i check everything and it ended up being a fuel injector problem, my freind told me that the engine was being save from being blown becuase it was runing on 3 pistons and the computer limited the rev to 4k, check the fuel injectors, if they are not giving proper fuel, it wont start correctly, or run correctly. let me know, juz trying to give u an idea

90datech

thanks.... thats kinda what i been thinking could be the problem.....

boosted crx-r

your TPS and Map sensor plugs need to be switched around!!!!!!!!!!!!!!!

ltrkstr2k

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted crx-r &raquo;</TD></TR><TR><TD CLASS="quote">your TPS and Map sensor plugs need to be switched around!!!!!!!!!!!!!!!</TD></TR></TABLE>
read the rest of the post we have and thats not the problem.