My Car Feels Like It's Hitting R&r But It's A Remaped Ecu

[WogsRus]

Ok so today i had my bin file from the CENTRAL 20 ECU looked at, and apparently it has no boost cut, and speed cut removed (knew that one) and 6900 rpm limit.

However what is happening, at 15 psi, the car feels like it is hitting a brick wall, and jolting, and then above 3500rpm takes of fine, no issues what so ever.

Below 12 psi, the car feels fine, a little retard posible but otherwise ok.

This ecu pulle 217 rwkw on my current setup, but over the past 4 months the car just has not felt right. I have done heaps of test for stuffed sensors and consults ect. and nothing there. Car usesd about one tak per 300 km in town.

The car developed a cold start issue, where as it started on 3 cylinders, cleared it throat, and then all 6 fire up. I have checked everything as per this post.

http://www.skylinesaustralia.com/forums/in...820&hl=cold

Can somone tell me what i might need to look for.

I will get the car tested soon, but need some ideas in the mean time.

HELP ME, AGAIN. LOL>

[paulr33]

i had this issue when i tried a remap

i had a series 2 R33 and i got a s1 remap ecu and it ran like bozz

it was something about the MEC chip being the wrong one

sorry i cant be of much help. it was from a guy on the forums, tashi i think his name was

[WogsRus]

yeah the funny thing is mine ran great and then something happend and it ran like shit.

[MANWHORE]

paul, wog's car's been working all this time. it's only now.

It sounds like it could be a spark issue like coilpacks or sparkies. I know you got splitos, but have you got new sparkies? what gap?

I remember reading a thread where people had problems with highboost and splitos. could be that?

[paulr33]

well he could have said that, i was reading as if he had just tried this new remapped ecu

[WogsRus]

plugs are relatively new, and gap is 1mm, i have had 0.8mm but made no differance, it is being a dog at low rpm not high, humm who knows, but it is certainly strating to piss me off.

oh yeah sorry Paul, the ecu has been in for ages and ran great, only last 4 months being crap.

Edited May 24, 2007 by WogsRus

[STATUS]

who did the remap? i have been fixing quite a few lately.

Edited May 24, 2007 by URAS

[enilyks33r]

It may be ignition, close the plug gap down to .65 and see how it performs.

I have seen this fix what feels like R&R.

Give it a try.

[T04GTR]

R and r? cmon mate. sreiously. what about l and a? lol

[Rolls]

Was it done specially for your car or was it just a random chip?

If so get it on a dyno and get a proper remap its probably running way rich.

[WogsRus]

Ok so i should have clarified eaven further.

The computer has been on the car for ages, and running with the SAFC II to bring the power up eaven more. The ECU is a generic one that is put out with Central 20 cars, so it uses all stock componenst and sensors, with new maps and so forht,

The car made in the current form, with Central 20 ecu and the SAFC II as per my sig 217 rwKw.

The car ran fine for agen but one hot day something went funcy, and every since it is hard to start cold, and the car feels the way it does.

The car WAS tuned in teh car with an SAFC II on a dyno, with perfect AFR's

The car was running fine for ages, say 6 months, only a recent thing.

Nothing has changes in the car mod wise.

DOES that clarify anything?

[WogsRus]

ok so i gapped the car down to .6mm gap and DAM it goes EAVEN WORSE. I mean below 4000rpm it's like a tracktor, the thing missfires and shit, compleat shit, and then bag wheel spin. I downloaded the rom and yeah i have no airflow limit, so the ecy should be fine.

What can couse missfire/splutering at low rpm.

This suxxxxxx.

Is it possible an airflow meter or a cam angle sensor.

Could it be a knock sensor?

HELP ME PLEASE

[enilyks33r]

If is got worse with a smaller gap it sounds like the plug's heat range is too cold and its fouling.

What spark plug are you running?

[fr0st]

It'd say its probably the AFM, give it a decent clean and hopefully you'll see some improvement.

Otherwise the knock sensor could be faulty and making it run on the lower octane maps. Do you have a consult cable to check?

[WogsRus]

The plugs are 6's and are spot on to look at.

Yeah got consults, pickes up nothing. My voltage on the AFM at 750 rpm is 1.2V i think that is OK.

I did a log of the car this morning and noticed that as soon as it does this and goes funny, the oxygen sensor drops to zero and then bounces back then back to zero,

WHAT THE????

[Rolls]

Probably just because its running so rich when it misses, if its faulty it shouldn't cause problems like that anyway. Nothing to lose, unplug it and see how you go for a day. It will run richer and use a lot more fuel at idle/cruise though.

[WogsRus]

Ok got new AFm and CAS and nothing. New plugs and still there.

I think it's time to go to the shop and let them strip me of my money to fix it.

[SECURITY]

have you checked your silicon hoses on your intercooler for small cracks or leaks?

i had this and the car flat spotted high in the rev range.

go around while the car is on and spray some detergent onto your silicon hoses and see if it bubbles up anywhere.

[WogsRus]

car is fine in high revs THE LOW REVS ARE THE PROBLEM below 3500rpm.

[SECURITY]

try it anyway.