Running rough with Flash ECU

**Chris@Rvengeperformance** · 04-17-2013, 05:16 PM

Originally Posted by ChargerX3

Who does a 5 min log?

Its the V2 rom. He shot it my way but i couldn't see any issues with it. Sent him in the direction to disable the emissions peripheries and set proper timing latencies for 1st gen. About as far as i got with it.

It would take very little logging to possibly spot the issues as his issues are immediate.

**HardProvidence** · 04-18-2013, 02:07 PM

I did get some logging done last night but boy is it hard to find a road with a long enough stretch to top out the 3rd gear, in my area.
There are a few spots where I could easily go over 130 comfortably and safely but that's including going through first and second gears first.
With out compromising safety even further outside my comfort zone and cutting it close to the end of the road, I've barely managed to get my 3rd gear up to 6000RPM at which my speedometer was showing me a little over 120mph.

There is so much lag up until 2500rpms in every gear. If I floor it before that area there is just no power and once it reaches 2500 rpm it kick in like a mule. (Under normal driving it still kicks just not as hard)
Once I floor it and my turbos eventually spool up my boost spikes to 15psi at 2500rpm on my after market gauge and then comes down to the usual 9psi by 3500rpm.

Originally Posted by Forest Gump

could you post a 5 minute log?

I'm not sure what you mean by a 5 min log. I've got a few logs of my 3rd gear pull from 35,40 mph to 120mph and a few of me driving normally in the city and the freeway.

I'm not sure how to post logs on here: copy and paste from excel as text? Screen shot it and post it as a pic? Any other ways?

Originally Posted by Forest Gump

was your idle super low?

A pic of my stock ECU idle fully warmed up
https://sphotos-b.xx.fbcdn.net/hphot...82800261_n.jpg
A pic of my Chromed ECU idle fully warmed up
https://sphotos-a.xx.fbcdn.net/hphot...21241756_n.jpg

Here is a video of my clutch chatter/knocking at idle
http://www.youtube.com/watch?v=9ZExT...ature=youtu.be

Thank you guys for looking.

**Chris@Rvengeperformance** · 04-18-2013, 02:25 PM

All I needed was a snapshot of evoscan when the problem is happening. I wouldn't beat on the car with something wrong like this.

log the o2 sensors, rpm, tps, isc counts, etc and just post a csv file as an attachment here. Just log it ideling for for a minute or so.

**Chris@Rvengeperformance** · 04-18-2013, 02:26 PM

you're idle is very low with the chrome ecu

**Greg E** · 04-18-2013, 02:41 PM

Looks like the front and rear o2 sensors are swapped on the jesters chip.

**Jesters Deadd** · 04-18-2013, 02:47 PM

This sounds odd. I will PM you my number and we can try a couple things.

Originally Posted by HardProvidence

I've got a 1st gen Plug and Play ECU for my 91 stealth rt tt
My mods are intake and a down-pipe with no main cat and no front pre-cat.
I've wired the Flash ECU just like it says on chromedecu.org I've double checked all the wires and then checked them again few more times to make sure I've installed them correctly.

The car ran great with the flash ECU until she warmed up. Once warmed up the following happens:
-When starting from a stop I give it gas and engage the clutch, once I start to roll and my foot is off the clutch the car stutters and jerks as if its my first time driving a manual.
-Also sometimes it feels like there is no power even when I floor it, but once I floor it for a few sec eventually the power comes in.
-There is also a very loud knocking sound coming from the engine bay when I'm in neutral. The sound goes away when I push in the clutch pedal.

Only thing I've done to the ECU is disabled Periphery 2 bits 15, 14, 13, 11, 10, 9, 3 and 1.
I've also changed Periphery 0 Bit 2.
But no changes to how my car behaved.

I don't feel save driving around with these issues. I've put the stock ECU back in, and she runs like a champ, no issues what so ever.

I've asked about this on a local forum and they recommended me posting this thread on this site.

I'm still new to this and need some guidance, any input would be much appreciated.

Thank you for reading.
-Nick.

**Jesters Deadd** · 04-18-2013, 02:52 PM

Originally Posted by Greg E

Looks like the front and rear o2 sensors are swapped on the jesters chip.

Hmmm, I doubt it but if it is we can just turn the jumpers.
@ Hard anyway give me a call we can get this fixed.

**Greg E** · 04-18-2013, 02:59 PM

Originally Posted by Jesters Deadd

Hmmm, I doubt it but if it is we can just turn the jumpers.
@ Hard anyway give me a call we can get this fixed.

Front and rear low trims are opposite maxed. What little I could make out from the log, the issue occurrs during closed loop. The brief times I could see the ECU in this mode, the sensors were opposite maxed and didn't move.