viperjng

Hi,

Just put together my engine which was built and assembled in the US and shipped to me in 2 separate boxes.

Installed my ITB's and tried out my new ECU P28 Neptune RTP Demon. Now am having a weird problem. As per the tuner he is unable to further lean out the mixture on idle(AFR 7.4-8.1) as injectors are running at just about 1 % duty cycle.

Overall the car is running very rich which is causing a concern to me. Have done about 200kms since the engine was installed and already consumed about 50 litres of fuel.

Any ideas on what the issue could be. The earlier setup almost identical only assembled in India but running on Chrome had no such issues.

What info do you guys need from me to trouble shoot the issue.

Jignesh

PS - The engine setup in discussion is the one in my signature line

GhostAccord

Injector size and fuel pressure?

viperjng

Precision 440 CC

Fuel Pressure was set at 40 psi which he has now reduced to I think about 30-35. The ITB's have been balanced as well .

Jignesh

viperjng

anybody pls help

nealnanoHX

Why are you running such large injectors on a NA build?? There is no need 310cc is plenty. Even so the tuner can tune for what ever injectors you run. Also could be a bad AF reading. I would get another tuner.

DDTECH

Half the crap you say, doesn't make any sense. Have you ever tuned a 2.0L motor with ITBS? Obviously not. I've seen mild cars do "ok" with 310s and around 7k start to max them out, @ 45 fuel pressure.

440cc's are fine for this motor.


check your overall fuel trim, should be around 25-28%

GhostAccord

Injector offset maybe..... I've had a few times using other injectors (DSM) that I was not able to bring the AFR's down without adjusting the battery or injector offset.

FlewByU352

Please stop posting because 2,000cc injectors can idle fine on a 140HP 1.8L. If you don't believe me then look at the videos of it on the dyno.

Fink29

I would get in contact with All Motor and send him the tune. i also run 440 injectors so that def not the issue.

GhostAccord

best option would be to have someone actually there to dial in the fuel for idle. It's hit and miss as to whether or not an online map will cure this issue. Unless the OP has a burner or an RTP that he can keep loading new maps onto.

OP needs a new tuner!

DDTECH

Obviously he needs a tune. But injector offset, overall fuel trim and what not, all play a roll.

This is obviously way over the head of the OP and he needs to have a experience person point him in the right direction.

Injector size has nothing to do with it, specially now since injectors are WAY more advanced then the older styles.. people run ID725 and ID1000s and they drive and run WAY better then the regular old 440cc RC's...

DDTECH

viperjng

Hi Guys thanks for all the answers. Now to clarify.

1> 440 CC injectors IMO are just right for this setup running Stage 2 cams and ITB's

2> Earlier setup had 85mm block and stock head with stage 2 valve train, ITB's but running Chrome with chipped ECU ( DO NOT HAVE THE SOFTWARE AND WAS TUNED BY THE EARLIER TUNER WHO SABOTAGED MY ENGINE). Could not read the maps or was given a copy.

3> Current setup race block built by Logic Motorsport and head by Portflow running Neptune RTP Demon so that whoever tunes the car does so on my laptop and I can get the map checked by someone.

4> Guy who tuned the car was using Neptune for 1st time which he told me but had no other option in my city.

Its obvious I need a good tuner which unfortunately do not have access to in Mumbai, India hence my post here. He has worked on Haltech , Motec, AEM etc

One thing i thought of but do not know if possible is tuning long distance via Team Viewer or similar software. If not I can mail the map to someone if they are willing to help me.

Lemme know if there is any other info that you guys need or want.

Jignesh

DDTECH

Send me the map - dereks.dunbar (at) Gmail.com

Let me look it over for you.

viperjng

Thanks man will mail it over to you tomorrow.

Jignesh

gstrudler

How rich does the car run otherwise? If it's rich everywhere, tune is either set for wrong injectors or your FPR is not set to what you think or is not working correctly.

viperjng

Hi,

The car is running rich overall. It idles between 7.4 & 8.0 when cold and after engine reaches 180*F goes to about 10.0. The car runs between 10-12.5 AFR. am 100% sure of the fuel pressure and have seen him enter the injector size correctly. Am guessing its something to do with the tune or fuel trim.(have no clue on tuning so pls ignore if i use the wrong terminology)

Jignesh

viperjng

Hi Guys,

What kind of cable do i require to datalog the MTX-L wideband with my Neptune ECU.

Data logging would help the tuner in knowing exactly how the car is behaving i guess.

Jignesh

viperjng

Guys,

Whilst am waiting for a solution to the issue (someone helping out with a map) want your advice on whether I should continue driving the car in current condition or wait till issue is sorted out.

Am currently get a FE of approx 4km/liter of petrol which is too less as fuel prices here are approx US$1.5/liter.

I heard someone mention that too rich a mixture would cause bore wash. Is that right.

This a new motor that's as of now clocked 350kms from the time it was fired up.

Jignesh

Fink29

Jignesh, dont drive the car like that. I went through the same issue and had to pull my motor apart. Did you send you map to ALL MOTOR?

viperjng

Hi,

Yup sent him the map 3 days ago which he recd and confirmed that it was a bad map. Guess he must be busy so will wait for him to make a map for me.

So i guess i'll just park the car and wait for the map before driving it around.


Jignesh

DDTECH

Viper, I'll be free tonight to send you a new map and discuss with you over the phone, been swapped here getting ready for some stuff.. I'll talk to you more on facebook.

viperjng

Sounds good Derek just buzz me and I'll call you.

Jignesh

q16racer

The engine would not hardly drive with a afr 10 and below. The fact that you have put that muxh mileage on it at that afr......your engine would be fried, especially the rings.. Is neptune properly setup? Wideband properly setup?

viperjng

Hi,

I could be totally wrong but isn't it the opposite. How would my rings get fried in a rich mixture.

I have no knowledge in tuning but that's what I was given to understand.

Jignesh