suprasoup

just did this upgrade and I'm using the is300 coils with 660cc injectors and tuning with safc neo. I also have a 485lph walbro. However I cannot get the car started. I'm getting spark and gas. I'm getting way to much gas. I'll pull my plugs after a few test starts and they will be soaked with gas and black. Do I need to dial more gas out? I tried taking 35% & 40%out across the board and I do have it setup on pressure sensor 1in 1out. Am I missing something? I keep flooding the engine and then have to let everything dry before trying again.

Thanks for any help

suprasoup

Ok, so I have gone through the entire range of the map on the SAFC NEO and still no luck. I even tried pulling -50 and tried at 0 still no start and plugs continue to be black and covered in gas. I do have spark, gas, compression, oil pressure. On the SAFC NEO sensor check screen I can see it getting proper voltage for the tps and map and show it adjusting the output of the map. I cant figure out why its still getting to much gas. The car does try and start sometimes but it just wont fully kick over and just shoots out black smoke. Do I need to adjust the distributer in either direction to help with timing since the SAFC advances the timing if so which way should I rotate it? Does anyone have any recommended setting for SAFC NEO with 660cc injectors?

Thanks

gerrb

iTrader: (34)

to isolate the problem , do you have the 440cc injectors ?

install them and your car should start well. If not then you have a different problem .

suprasoup

haha that's funny I just posted a WTB on supraforums and you responded haha. You are a busy guy.

However I just realized that the JDM TT injectors are side feed so I can't use them. (Dang)

suprasoup

It sucks because I didn't want to have to spend more money on injectors when these 660cc's should work but I figured the same thing as far as isolating the problem since I have ran through a list of other things. I have checked the TPS/Map/Fuel Pump/Coils/Spark plug wires/Spark plugs gapped @ .030 I just completed the rebuild on the entire motor and this will be its first time starting up.

It has compression and oil pressure. All the connections have been triple verified and some haha. One thing I just thought
about is when I did first try and start the car I discovered the map input and output were tapped into the incorrect wires on the SAFC NEO maybe its possible the SAFC NEO sent a signal to the ecu that messed it up. When I get home from work I'm also going to check the power and ground wires to make sure they are in the correct order as far as which one is on the harness side and which is on the ecu side just incase those are off.

Another thought, could I be damaging the motor by trying to start it so many times and just dumping gas in it? because if that's the case I'm going to just bite the bullet and get the 440cc's just to be safe and get rid of the neo till I can get a standalone.

thanks

gerrb

iTrader: (34)

yes .. because too much gas means you are washing the cylinder walls and fuel going into your oil (pan) which eventually can lead to bearings failure

suprasoup

Ok yeah I don't want to do that anymore then as I have already tried way to many times. Do you think it would be ok to throw in my GE injectors just to try and diagnose or best bet to just grab some new 440's. I'm going to change the oil just for good measure before trying again.

One more thing is I noticed the denso 660's I put in have a different spray nozzle than stock it has 1 large hole with a metal tip sticking out of it. Could this be a problem?

Thanks for your help Gerrb.

gerrb

iTrader: (34)

Spray nozzle doesn't matter . Injector designs and spray patterns differ. What is important is the amount of fuel that is actually sprayed that matters.

you can throw in the GE injectors but you will be lean and can't run on them .. but just to see if it will start yes .

suprasoup

ok I may do that however I will need to break in the motor and would need to put it in a rev range of about 1800-2500 for about 20mins or so do you think it will be ok using the GE injectors for this if it does start.

Thanks

gerrb

iTrader: (34)

You will be taking a risk. I won't if it was me. Always do it right the first time is what I always say . I will rather wait till I have the right parts.

suprasoup

Ok, So I went ahead and bought some new bosch 440cc injectors from oside tiger on ebay. I will install once they arrive and report back.

thanks for the help

suprasoup

suprasoup

suprasoup

Update:
I replaced the spark plugs it did not help, tested for spark again and still got it on all 6 plugs and still to much gas. I did reset the ecu and try starting it and was able to have it produce code 31 which is low maf voltage signal. Im assuming this applies to the MAP sensor since i no longer have a MAF.

1 thing I have noticed is when the ecu is powered on it sends 4.22v through the map sensor signal wire (pin 62) when un plugged and I get 4.99v on the power wire and a good ground on the ground wire. Is it normal for the ECU to be sending 4.22v through the MAP signal wire when the MAP is un plugged

I read another post where someone asked this question however in there case they had 4.99v on both signal and power wire and for them ended up being a bad MAP so maybe my ECU is dead if its not sending out the same volts as the power wire.

In the mean time Im stumped and any help is always appreciated.

thanks

suprasoup

Update:

Something that just hit me, I remember when I was trying to start the car a few times it would occasionally go into positive pressure on my boost gauge which it tapped to the intake manifold and another thing I noticed was the intake manifold was getting hot but the exhaust manifold was still cold.

Now why would there be positive pressure in the intake? Could it be that I put the timing belt on incorrectly causing the intake valves to be open and letting pressure in. I think this can really be the only thing allowing pressure to build up while trying to crank the car. This could be my problem, if it is then I will feel like an idiot but will be super happy to finally drive her. I've been building the car for a full year. I'm ready to enjoy it.