Problems after ECU reset. Help PLEASE !
04 November 2011, 01:31 PM
#1
Scooby Regular
Thread Starter
iTrader: (14)
Join Date: Nov 2010
Location: Bedford
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
Problems after ECU reset. Help PLEASE !
Right.V2 Sti 96. I've recently fitted Harvey's ported headers with matching uppipe, drove the car for couple of days and everything was absolutely fine, spot on, till I decided to reset the ECU. Straight after that car started choking on a low throttle between 1500-2000 revs. The symptoms are like the petrol runs out. It's choking but only in that range of revs on light throttle. Above that range is absolutely fine. If I'll put my foot down is OK. Never happened before !
Any ideas ???
Any ideas ???
04 November 2011, 03:28 PM
#3
04 November 2011, 04:54 PM
#5
Scooby Regular
Thread Starter
iTrader: (14)
Join Date: Nov 2010
Location: Bedford
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
Hmm... Cheers guys.
Would faulty/bad coil pack give similar symptoms ?
This is very weird 'cause it only does that at low revs 1000-2500 when just touching acceleration pedal. When pushing it "harder" is OK. To me it looks like something is wrong with ignition.
Would faulty/bad coil pack give similar symptoms ?
This is very weird 'cause it only does that at low revs 1000-2500 when just touching acceleration pedal. When pushing it "harder" is OK. To me it looks like something is wrong with ignition.
04 November 2011, 07:01 PM
#7
Scooby Regular
Thread Starter
iTrader: (14)
Join Date: Nov 2010
Location: Bedford
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
Just came back from shopping, driving through town centre in big traffic is a real nightmare. The car behavious like a Kangaroo !!!
Can somebody tell me the symptoms for faulty coil pack and fuel pump ? I've got a feeling it's due to ignition or fueling.
Can somebody tell me the symptoms for faulty coil pack and fuel pump ? I've got a feeling it's due to ignition or fueling.
Trending Topics
04 November 2011, 07:45 PM
#8
Scooby Regular
iTrader: (7)
Join Date: Sep 2004
Location: Devon
Posts: 1,115
Likes: 0
Received 0 Likes
on
0 Posts
did you put the lambda sensor in the new headers, and have plugged it in ? headers wont cause that problem at low/load revs.
If its all as it should be i would test the sensor is working if i were you
If its all as it should be i would test the sensor is working if i were you
Last edited by P1Drifter; 04 November 2011 at 07:47 PM.
04 November 2011, 08:19 PM
#11
Scooby Regular
Thread Starter
iTrader: (14)
Join Date: Nov 2010
Location: Bedford
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
Yes, it's standard ECU (6K) with Major_Sarcasm chip. I'm running fully decat system without lambda sensor. I own this car for nearly 3 Years now (with no lambda) and NEVER had such a problem.
04 November 2011, 08:44 PM
#13
Scooby Regular
Thread Starter
iTrader: (14)
Join Date: Nov 2010
Location: Bedford
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
Believe me or not but it's Very Good. I'm doing 250 miles on a full tank. Mainly going to work and back (5 miles each way). If you'll drive my car without looking at the fuel gauge, you would say that petrol is running out. Everything is back to norm above 3000revs - kicks as normal. Only does it at low range, on every gear. Let say rolling on 4th at around 2000 revs if you want to accelerate it start choking for few seconds and when you reach 3000 is OK.
Last edited by ScoobyForLife27; 04 November 2011 at 08:45 PM.
04 November 2011, 08:50 PM
#14
Scooby Regular
Thread Starter
iTrader: (14)
Join Date: Nov 2010
Location: Bedford
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
1st, 2nd and 3rd gear are the worst ones. It does it really bad and I think it's getting worst. It feels like running on 3 cylinders for few seconds and then everything coming back to norm.
04 November 2011, 09:00 PM
#16
Scooby Regular
iTrader: (7)
Join Date: Sep 2004
Location: Devon
Posts: 1,115
Likes: 0
Received 0 Likes
on
0 Posts
if it were an ignition or fuel pump fault you would expect it to show up worse in the higher load/boost areas, the lambda is only used in the areas of low load/revs you describe and is ignored above that
05 November 2011, 08:02 PM
#22
Scooby Regular
Thread Starter
iTrader: (14)
Join Date: Nov 2010
Location: Bedford
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
Hi. I reset the ECU again and... STILL SAME :-(
I also noticed that it doesn't do that when engine is cold. It starts doing it after a few hundred meters when starts getting warm and warmer the engine is, it seems to be worst and worst. Also, the idle is steady, I mean it holds it revs (around 800) but you can feel that engine is not running smooth.
Please HELP !!!
I'm going Wales on Saturday so I need a car in fully working order.
Thank You
I also noticed that it doesn't do that when engine is cold. It starts doing it after a few hundred meters when starts getting warm and warmer the engine is, it seems to be worst and worst. Also, the idle is steady, I mean it holds it revs (around 800) but you can feel that engine is not running smooth.
Please HELP !!!
I'm going Wales on Saturday so I need a car in fully working order.
Thank You
06 November 2011, 02:47 PM
#25
Scooby Regular
Thread Starter
iTrader: (14)
Join Date: Nov 2010
Location: Bedford
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
SORTED :-) !!!!!!!!!!!!!
It was a Lambda sensor. Time I was changing headers I unplugged it thinking it was a EGT sensor (exhaust gas temperature sensor) and left it hanging on a side. I thought my car hasn't got a lambda 'cause the hole in the downpipe was blanked off. I didn't know that Classics 93-96 have lambda in headers. So, I plugged it in to the downpipe (luckily the wires were enough long) and my Beauty is back to Live :-)
Every day is a new experience, isn't it ?
Thank You guys for all the replies.
It was a Lambda sensor. Time I was changing headers I unplugged it thinking it was a EGT sensor (exhaust gas temperature sensor) and left it hanging on a side. I thought my car hasn't got a lambda 'cause the hole in the downpipe was blanked off. I didn't know that Classics 93-96 have lambda in headers. So, I plugged it in to the downpipe (luckily the wires were enough long) and my Beauty is back to Live :-)
Every day is a new experience, isn't it ?
Thank You guys for all the replies.
06 November 2011, 04:22 PM
#27
Scooby Regular
Thread Starter
iTrader: (14)
Join Date: Nov 2010
Location: Bedford
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
:-) P1 Drifter
Yes, Thank You !
I'm so glad it was that, otherwise I'll have to take my wife's car (going Wales next weekend) but definitely NOT same fun and pleasure as going by Impreza :-)
Yes, Thank You !
I'm so glad it was that, otherwise I'll have to take my wife's car (going Wales next weekend) but definitely NOT same fun and pleasure as going by Impreza :-)
06 November 2011, 04:55 PM
#28
SORTED :-) !!!!!!!!!!!!!
It was a Lambda sensor. Time I was changing headers I unplugged it thinking it was a EGT sensor (exhaust gas temperature sensor) and left it hanging on a side. I thought my car hasn't got a lambda 'cause the hole in the downpipe was blanked off. I didn't know that Classics 93-96 have lambda in headers. So, I plugged it in to the downpipe (luckily the wires were enough long) and my Beauty is back to Live :-)
Every day is a new experience, isn't it ?
Thank You guys for all the replies.
It was a Lambda sensor. Time I was changing headers I unplugged it thinking it was a EGT sensor (exhaust gas temperature sensor) and left it hanging on a side. I thought my car hasn't got a lambda 'cause the hole in the downpipe was blanked off. I didn't know that Classics 93-96 have lambda in headers. So, I plugged it in to the downpipe (luckily the wires were enough long) and my Beauty is back to Live :-)
Every day is a new experience, isn't it ?
Thank You guys for all the replies.
Thread
Thread Starter
Forum
Replies
Last Post
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
18 November 2015 07:03 AM
MightyArsenal
Wheels, Tyres & Brakes
6
25 September 2015 08:31 PM
