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 Posted: Sat Jun 22, 2013 6:43 am |
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Joined: Nov 21, 2010
Posts: 515
Trade Rating: 0
Location: Oxford
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Right I've been putting up with this problem for a while but now it's got a lot worse. It doesn't like cold starts. When I pull away it really struggles and when I push the accelerator slightly the revs drop. Now it's banging and sounds like a misfire. When the cars warm it runs normally with no issues.
Any ideas? I thought coil pack maybe
Thanks
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Posted: Sun Jun 23, 2013 1:19 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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I believe that the GTI like most has two temp sensors. One is for the gauge and one is for temp to ECU to ensure correct fuelling. If the sensor is defective it might be sending a signal to the ECU saying the engine is already hot so for a cold engine it would under fuel the car and run lean when cold so it could be that sensor.
Personally though I am with you and would suspect coil pack. Can you swap with a mate?
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| Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm)
Why isn't my daughter an Alfaholic? | |
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Posted: Sun Jun 23, 2013 2:04 pm |
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Joined: May 25, 2011
Posts: 1025
Trade Rating: +1
Location: south coast
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personally i would be looking at the temp sensor first before spending out on a new coil pack.
both of my 180's used to run rough from cold but changed the sensors and it has made a big diffrence to them.
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Posted: Sun Jun 23, 2013 2:20 pm |
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Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece
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| broadblaster wrote: |
personally i would be looking at the temp sensor first before spending out on a new coil pack.
both of my 180's used to run rough from cold but changed the sensors and it has made a big diffrence to them. |
This is absolutely correct. Thermistors in temp sensors 'wear-out' by changing slightly in resistance from repeated cold-hot cycles.
Check for yourself by comparing Ω of a brand new one to an aged used one.
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| 1.4i, 2001, 3-door, China Blue
Repair safely - Drive safely | |
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