for the ones that run into the problems i had. for me to actually be able to drive it it was the BASEMAP. i purchased an eprom chip from phearable.net and gave them the specs and put the chip in and WAHLAAA... i was driving around. still need a tune but i wasnt able to even drive out my garage.


specs: t3/t4 turbo, 38mm wastegate, fully rebuilt motor, JE pistons and rods, ecu was told to me tuned for this whole setup dont know the prog, 450cc inj, 255 fuel pump.

problems: after sitting for a couple hours it will start up and idle at 1500 but after warm itll get to 500 and eventually die. then wont idle that good and rev loopy. also if give gas itll either drop rpms or die.

what i tried: adjusted iacv and replaced. adjusted ignition time advanced and retard. put my aem fpr from my em1 adj that in all areas.

im done looking at forums cause ive tried everything ive read. only thing that is off is O2 sensor not plugged in


all in a nut shell...


no connection nearby to run this O2 sensor


pic of map incase someone wondering


question myself on how i ran this wastegate hose with xs boost controller to IM

 

I would say a combination of no tune and no o2

 

would virgin p75 or p74 ecu get it running some what properly u think?

 

not with the 450cc injectors, and no o2 sensor.

 

take WG spring out
hook up O2
put in factory injectors
put in P75 ECU

Drive it to the tuners and have them tune it and you shoudl be good-

 

u know a diagram that shows where to run that O2 cause i didnt see no where to run it

 

morning bump anyone else have any ideas.

 

I had the exact same idle/warmup problems with my single cam when I first put it back together.

Make sure the IACV plug is the right plug thats supposed to be there, I had mine switched around to the other sensor ( the one circled on the right ). They both have the same plugs thats why. Try switching them.

I did the same thing as you, bought a new IACV cleaned it many times. I switched the plugs around and everything was back to normal.

 

bump. what if the plugs dont reach to one another. going to work on the car in a week and want some ideas. thanks.

 

im on fmu,stock inj,no o2.Not a single problem

 

bump. anyone else any ideas?

 

any CELs? i assume you have to at least have one for the o2 sensor. you need to clear those up first. the factory o2 plug is probably under the IM somewhere, in the bunch of wires near the thermostat maybe. if you see any loose plugs you can check for continuity with the ecu to confirm its the o2.

also i would suggest moving the o2 sensor back to a more factory location. its too close to the turbo and is probably going to fail prematurely.

only other issues i can think of are with the map sensor or settings in the ecu. as suggested it needs to be tuned. since you are on an unknown ecu map, its possible the injectors and/or map sensor are scaled incorrectly.

 

does anyone think nytosc idea will work?

 

morning bump for a little more extra advise. thanks

 

What CEL are you throwing. the problem you described is most likely due to the motor running lean once fully warmed up. u need to get your car tuned, no ifs, whys, or buts about it.

 

not if you are still throwing CELs or have sensors wired incorrectly. it may help the issue of your injectors or map sensor are scaled wrong.

we have given you plenty of ideas, time to start troubleshooting

 

i will this weekend. thanks a lot guys.

 

o2's will not cause a car to **** up on idle, if it is unplugged and the ecu catches it (which it wont on startup) it'll go back to a base map. sounds like you have a vacuum leak

 

extend your 02 wires and plug it in, the stock 02 sensor plug is under the intake mani on obd1 cars, so extend the wires on the downpipe and plug it in. might help?

next thing i can think of is a vacuum leak or either that computer ur running on is ****.

 

connecting the O2 wont do much if the cars running pig rich right now. get the car tuned and have the O2 disabled

 

Exactly- Get the car to a tuner on a stock ECU/injectors with no WG spring in it-

As for the O2, I would definitely have it functioning properly- you need to find out where on the car the other side went (or where the wires went lol) and solder a connector on and plug it in

 

ok. so i took spring out wg and put stock ecu in. not injectors cause the clips did not clip in. but the car started up and was steady at idle and felt like i can drive but i didnt. so now im looking for a good tuner in east tn, west va, or nc. thanks guys.

 

i doubt the car is going to be driveable with 450's and a stock ecu. what injectors where you trying to clip in? any obd1 clips should work

 

i got the oem injectors and tried to clip on and didnt fit. they are the dsm clips with the metal ring around the clips.





this is what the stock injectors i got look like



oem injector clips do i need?



thanks guys.

 

the DSM injectors use obd0 clips....obd1 injectors use obd1 clips.

do you have the resistor box hooked up when you have the DSM injectors hooked up?

but if you want to put inthe stock injectors you need to get a set of obd0 injectors since you already have the resistor box hooked up.